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t
he
hi
d
d
e
n m
e
s
s
a
ge
i
n
t
h
e l
en
g
t
h
b
et
w
een
w
o
r
d
s
[
4
]
.
F
i
gu
r
e
1.
Maj
o
r
cat
eg
o
r
y
o
f
s
t
eg
an
o
g
r
ap
h
y
F
o
r
f
eat
u
r
e
-
b
as
ed
t
ech
n
i
q
u
e,
i
t
al
t
er
s
t
h
e f
eat
u
r
e o
f
t
h
e l
et
t
er
b
y
m
an
i
p
u
l
at
i
n
g
i
n
t
h
e s
h
ap
e,
s
i
ze,
an
d
p
o
s
i
t
i
o
n o
f
t
he
f
o
nt
i
n t
he
t
e
xt
.
T
he
f
e
a
t
ur
e
-
b
a
s
ed
t
ech
n
i
q
u
e
m
ak
e
s
t
h
e
r
ead
er
d
i
f
f
i
cu
l
t
t
o
r
eco
g
n
i
ze
t
h
e
h
i
d
d
en
in
f
o
r
m
a
tio
n
i
n
th
i
s
te
x
t [
5
]
.
T
h
e
n
,
d
u
e
to
th
e
c
h
a
r
a
c
te
r
is
tic
o
f
th
is
te
c
h
n
iq
u
e,
f
eat
u
r
e
-
b
a
s
ed
can
b
e u
s
ed
b
y
m
an
y
r
e
s
ear
ch
er
s
b
as
ed
o
n
t
h
e
ch
ar
act
er
o
f
l
a
n
g
u
a
g
e
i
n
t
h
e
w
o
r
l
d
.
B
as
ed
o
n
c
u
r
r
en
t
e
f
f
o
r
t
r
es
ear
ch
ab
o
u
t
f
eat
u
r
e
-
b
as
ed
t
ec
h
n
i
q
u
e,
i
t
c
o
n
s
i
s
t
s
o
f
t
w
o
ca
t
eg
o
r
i
es
;
l
a
n
g
u
a
g
e b
as
ed
t
h
at
ca
n
b
e
u
s
ed
o
n
l
y
i
n
cer
t
ai
n
l
a
ng
ua
ge
a
nd
l
e
t
t
er
b
as
ed
t
h
a
t
can
b
e u
s
ed
i
n
a
n
y
l
a
n
g
u
a
g
e t
h
at
u
s
es
A
u
n
t
i
l
Z
l
et
t
er
.
T
h
e cl
a
s
s
i
f
i
cat
i
o
n
o
f
wo
r
d
-
r
u
l
e b
as
ed
an
d
f
eat
u
r
e
-
b
a
s
e
d
a
s
t
e
xt
s
t
e
ga
no
gr
a
p
h
y s
h
o
w
s
i
n F
i
g
ur
e
2
.
F
i
g
u
r
e 2
.
M
aj
o
r
cat
eg
o
r
y
o
f
i
m
p
l
e
m
e
nt
a
t
i
o
n o
f
s
t
e
ga
no
gr
a
p
h
y
F
i
g
ur
e
2
ha
s
s
ho
w
n
t
h
e
c
a
t
e
gor
y
of
t
e
xt
s
t
e
g
a
n
og
r
a
phy
t
h
a
t
i
s
t
h
e
f
oc
us
of
s
t
u
d
y
i
n
t
h
i
s
pa
pe
r
.
I
t
cl
as
s
i
f
i
ed
an
y
k
i
n
d
o
f
t
ech
n
i
q
u
es
i
n
w
o
r
d
-
r
u
l
e b
as
ed
an
d
f
e
at
u
r
e
-
b
as
ed
b
as
ed
o
n
cat
eg
o
r
y
,
t
h
e
n
i
d
en
t
i
f
y
t
h
e
i
s
s
ue
i
n t
he
t
e
c
hni
q
ue
.
T
e
x
t
S
t
e
g
an
og
r
ap
h
y
W
o
r
d
-
r
u
l
e b
a
s
ed
L
i
ne
-
sh
i
ft
c
o
di
ng
W
or
d
-
s
h
i
ft
C
o
di
ng
F
ea
t
u
r
e
-
b
a
s
e
d
L
a
n
g
gu
a
g
e
-
ba
s
e
d
L
e
tte
r
-
ba
s
e
d
Evaluation Warning : The document was created with Spire.PDF for Python.
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s
i
a
n J
E
l
e
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E
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&
C
o
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p
S
c
i
I
SSN
:
2502
-
4752
E
v
al
uat
i
on
R
evi
ew
o
n
E
f
f
ect
i
ven
es
s
a
n
d
S
ecu
r
i
t
y
P
er
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(
R
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749
2.
EV
A
LU
A
TIO
N
R
EV
I
EW
I
N
TEX
T S
TE
G
A
N
O
G
R
A
P
H
Y
E
s
s
en
t
i
al
l
y
,
t
h
e cr
i
t
i
ca
l
i
s
s
u
e o
n
t
h
e e
x
i
s
t
en
ce o
f
t
ex
t
s
t
e
g
an
o
g
r
ap
h
y
m
et
h
o
d
i
s
eas
i
l
y
d
i
s
co
v
er
ed
[
6
]
.
T
he
d
e
t
e
c
t
o
r
s
c
a
n d
i
s
c
o
ve
r
t
he
hi
d
d
e
n
m
e
s
s
a
ge
s
e
xi
s
t
i
n
t
he
t
e
xt
,
i
f
t
he
y
no
t
i
c
e
t
he
c
ha
nge
s
o
f
t
he
l
e
t
t
e
r
i
n t
he
an
al
y
s
ed
t
ex
t
[
7
]
.
A
l
s
o
,
t
h
e
h
i
d
d
en
m
es
s
ag
e
s
w
h
i
ch
h
av
e b
e
en
e
m
b
ed
d
ed
w
i
l
l
b
e l
o
s
t
,
i
f
t
h
e d
et
ect
o
r
ch
an
g
es
th
e
te
x
t [
8
]
.
T
h
e d
et
ect
o
r
s
can
d
o
s
o
i
f
ch
a
n
g
es
ar
e d
o
n
e t
o
t
h
e t
ex
t
s
u
c
h
as
d
el
et
i
n
g
s
o
m
e l
et
t
er
o
r
w
o
r
d
s
,
m
o
d
i
f
yi
ng i
t
s
c
o
nt
e
nt
,
r
e
t
y
p
i
n
g,
a
nd
o
t
he
r
c
ha
n
ge
s
t
ha
t
d
i
r
e
c
t
l
y
m
a
ke
t
he
h
i
d
d
e
n
m
e
s
s
a
ge
va
ni
s
h i
n t
he
t
e
xt
.
A
cco
r
d
i
n
g
t
o
t
h
i
s
i
s
s
u
e,
t
h
er
e ar
e t
w
o
p
r
o
b
l
em
s
d
i
s
co
v
er
ed
b
y
p
r
ev
i
o
u
s
r
es
ear
ch
er
s
i
n
l
e
t
t
er
-
b
as
ed
t
e
c
hn
i
q
ue
,
w
h
i
c
h a
r
e
t
he
l
a
c
k o
f
e
f
f
e
c
t
i
ve
ne
s
s
i
n d
e
ve
l
o
p
i
ng
t
he
t
e
xt
s
t
e
ga
no
gr
a
p
h
y
m
e
t
ho
d
[
9
]
a
nd
l
o
w
s
e
c
ur
i
t
y f
o
r
c
o
ve
r
i
ng t
e
xt
i
n o
r
d
e
r
t
o
hi
d
e
hi
d
d
e
n
m
e
s
s
a
ge
[
1
0
]
.
T
hus
,
t
hi
s
p
a
p
e
r
c
o
nc
e
r
ns
ho
w
t
he
i
n
f
l
ue
nc
e
s
o
f
t
he
e
f
f
e
c
t
i
ve
ne
s
s
a
nd
s
e
c
ur
i
t
y
i
n t
e
r
m
o
f
d
e
ve
l
o
p
m
e
n
t
o
f
t
e
xt
s
t
e
ga
no
gr
a
p
h
y
i
m
p
l
e
m
e
nt
a
t
i
o
n.
2
.1
E
f
f
e
c
t
i
ve
n
e
s
s
of
S
t
e
gan
ogr
ap
h
y P
e
r
f
or
m
an
c
e
T
h
e
ef
f
ect
i
v
e
n
es
s
p
er
f
o
r
m
a
n
c
e i
s
t
h
e
i
n
d
i
cat
o
r
s
t
o
ai
m
ac
h
i
ev
e
m
en
t
b
as
ed
o
n
s
o
m
e
m
ea
s
u
r
e
m
en
t
s
u
c
h
a
s
ap
p
r
o
p
r
i
at
en
es
s
,
acce
s
s
s
y
s
t
e
m
an
d
q
u
al
i
t
y
p
er
f
o
r
m
a
n
ce [
1
1
]
.
I
n
t
er
m
o
f
co
m
p
ar
i
s
o
n
,
ef
f
ect
i
v
e
n
es
s
i
s
a cl
ai
m
ed
t
h
e ap
p
r
o
p
r
i
at
e r
es
u
l
t
i
n
o
n
p
er
f
o
r
m
a
n
ce s
y
s
t
e
m
h
a
s
i
m
p
r
o
ve
d
t
ha
n o
t
he
r
p
r
e
vi
o
us
s
ys
t
e
m
s
.
I
n o
t
he
r
w
o
r
d
s
,
i
f
t
h
e q
u
al
i
t
y
p
er
f
o
r
m
an
ce i
s
b
et
t
er
t
h
an
o
t
h
er
s
ar
e,
i
t
m
ea
n
s
t
h
e s
y
s
t
e
m
u
s
ed
i
s
ef
f
ec
t
i
v
e a
n
d
m
o
r
e
d
es
er
v
ed
t
o
b
e u
s
ed
i
n
a s
p
eci
f
i
c ap
p
l
i
cat
i
o
n
[
1
2
]
.
I
n t
e
xt
s
t
e
ga
no
gr
a
p
h
y
,
e
f
f
e
c
t
i
ve
ne
s
s
i
s
c
r
itic
a
ll
y
i
m
p
o
r
ta
n
t
f
a
c
to
r
to
r
e
v
ie
w
i
n
o
r
d
e
r
to
d
e
v
e
lo
p
th
e
t
e
c
hn
i
q
ue
[
1
3
]
.
I
t
i
s
b
e
c
a
us
e
s
t
e
ga
no
gr
a
p
h
y c
a
n b
e
t
he
o
p
t
i
o
ns
f
o
r
p
r
o
c
e
s
s
i
n
g i
n
s
e
c
ur
i
ng
m
e
s
s
a
ge
s
.
T
he
r
e
f
o
r
e
,
i
t
ha
s
t
o
r
e
c
o
gni
z
e
f
ur
t
he
r
t
ha
t
s
t
e
ga
no
gr
a
p
h
y i
s
e
f
f
e
c
t
i
ve
t
o
us
e
i
n s
e
c
ur
i
ng
m
e
s
s
ag
e
s
as
p
ar
t
o
f
i
n
f
o
r
m
a
t
i
o
n
hi
d
i
ng.
S
p
e
c
i
f
i
c
a
l
l
y
,
f
o
r
t
e
xt
s
t
e
ga
no
gr
a
p
h
y
b
e
c
a
us
e
c
o
ve
r
i
n
g
m
e
s
s
a
ge
i
n
t
e
xt
d
o
m
a
i
n
i
s
m
o
r
e
u
s
e
f
u
l
t
h
a
n
ot
h
e
r
m
e
di
um
[
9]
.
T
h
os
e
a
r
e
v
i
e
w
i
n
g
f
r
o
m
m
o
s
t
of
i
m
por
t
a
nt
i
nf
or
m
a
t
i
on
i
n
bus
i
n
e
s
s
a
n
d
e
d
u
c
a
tio
n
u
s
u
a
ll
y
is
i
n
d
o
m
a
in
o
f
te
x
t
[1
3
].
T
h
e
r
e
f
or
e
,
on
e
of
c
on
s
i
de
r
i
n
g
of
t
hi
s
pa
pe
r
i
s
a
bou
t
r
e
v
i
e
w
e
d t
h
e
pe
r
f
or
m
a
n
c
e
of
t
e
x
t
s
t
e
ga
n
og
r
a
phy
t
h
at
m
ea
s
u
r
e
t
h
at
r
el
at
e
w
i
t
h
ef
f
ec
t
i
v
e
n
e
s
s
o
f
d
ev
el
o
p
m
e
n
t
t
ech
n
i
q
u
e
f
r
o
m
t
h
e p
r
ev
i
o
u
s
r
es
ear
ch
er
s
ef
f
o
r
t
.
T
he
e
f
f
e
c
t
i
ve
ne
s
s
o
f
t
e
xt
s
t
e
g
a
no
gr
a
p
h
y
p
er
f
o
r
m
an
ce
i
s
b
e v
i
e
w
ed
i
n
s
i
d
e
o
f
accu
r
ac
y
i
n
h
i
d
e t
h
e
h
i
d
d
e
n
m
es
s
ag
e,
q
u
al
i
t
y
p
er
f
o
r
m
an
ce
an
d
ap
p
r
o
p
r
i
at
en
es
s
d
ev
el
o
p
m
en
t
t
ech
n
i
q
u
e.
2
.2
S
e
c
u
r
i
t
y of
S
t
e
gan
o
gr
ap
h
y P
e
r
f
or
m
an
c
e
S
t
eg
a
n
o
g
r
ap
h
y
a
s
a
p
ar
t
o
f
i
n
f
o
r
m
at
i
o
n
s
ec
u
r
i
t
y
al
s
o
i
n
f
l
u
en
ces
i
n
t
h
o
s
e
as
p
ect
s
i
n s
e
c
ur
i
t
y
[
1
4
]
.
S
ecu
r
i
n
g
t
h
e
h
i
d
d
en
m
es
s
ag
e
t
h
at
e
m
b
ed
s
i
n
t
h
e t
e
x
t
t
o
t
r
a
n
s
m
i
t
t
o
w
ar
d
t
h
e e
x
act
r
ecei
v
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7
.
D
is
t
r
i
b
u
tio
n
w
h
i
te
s
p
ac
e [
2
0
]
ju
s
tif
ie
s
th
e
d
o
c
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m
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n
t
a
n
d
n
o
t
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i
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I
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f
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c
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:
l
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m
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d
p
o
r
tio
n
to
h
i
d
e
i
n
f
or
m
a
t
i
on
.
8
.
E
n
c
o
d
e
m
a
t
r
i
x f
o
r
i
n
s
t
an
t
m
es
s
a
g
e (
I
M
)
[
2
1]
E
n
c
o
d
e
of
m
a
t
r
i
x
ba
s
e
d
on
o
n
l
i
n
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c
h
at
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f
er
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o
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c
o
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d
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p
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g
a
d
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c
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t
l
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t
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f
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d
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n
m
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n
E
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s
h t
e
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.
I
n
e
f
f
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c
t
i
v
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s
:
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d
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d
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d
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n
g
m
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a
g
e ea
s
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h
a
p
p
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9
.
I
n
te
g
r
a
te
d
in
te
r
ch
ar
ac
t
e
r
[
2
2
]
A
d
j
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s
t
s
t
h
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c
h
a
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a
c
t
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r
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a
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b
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o
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f
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d
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y
.
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n
e
f
f
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c
tiv
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s
s
:
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m
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d
p
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to
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n
f
or
m
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t
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on
.
1
0
.
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d
v
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d
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p
t
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t
a
n
d
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rd
(A
E
S
)
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l
go
r
i
t
h
m
[
2
3
]
r
ep
r
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t
s
b
i
n
a
r
y
f
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m
t
h
e s
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o
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a
n
c
e d
ep
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d
o
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t
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f
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b
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d
a
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a
I
n
e
f
f
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c
t
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v
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s
s
:
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o
w
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d
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o
m
p
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x
a
l
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o
ri
t
h
m
p
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rfo
rm
a
n
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e
B
as
ed
o
n
T
ab
l
e
1
,
wo
r
d
-
r
u
l
e
b
as
ed
t
ech
n
i
q
u
e ca
n
d
ev
e
l
o
p
w
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t
h
o
t
h
er
ad
d
i
t
i
o
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al
t
ech
n
i
q
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es
.
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h
o
s
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t
ech
n
i
q
u
es
h
a
v
e o
w
n
p
r
o
ces
s
o
f
e
m
b
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d
d
i
ng a
nd
s
o
m
e
d
r
a
w
b
a
c
k t
ha
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l
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t
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w
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t
h e
f
f
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t
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ve
ne
s
s
a
nd
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c
ur
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t
y
p
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o
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m
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nc
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i
n i
m
p
l
e
m
e
nt
a
t
i
o
n o
f
t
hi
s
t
e
c
hn
i
q
ue
:
1.
I
n
t
er
m
o
f
ef
f
ect
i
v
e
n
es
s
p
er
f
o
r
m
an
ce,
i
n
w
o
r
d
-
r
u
l
e
ba
s
e
d
h
a
s
t
a
k
i
ng
a
l
ong
t
i
m
e
i
n pr
oc
e
s
s
e
m
be
ddi
n
g i
n
c
o
ve
r
i
n
g hi
d
d
e
n
m
e
s
s
a
ge
[
5
]
.
T
h
en
,
t
h
e t
ech
n
i
q
u
e al
s
o
h
a
s
i
s
s
u
e i
n
p
r
o
ces
s
d
ev
el
o
p
m
e
n
t
p
r
o
ces
s
h
as
c
om
pl
e
x
e
m
be
ddi
ng
a
n
d e
xt
r
a
c
t
i
ng
,
r
e
dun
da
n
c
y
h
a
ppe
n
e
d a
n
d h
a
s
l
i
m
i
t
e
d por
t
i
on
f
or
c
ove
r
i
n
g
m
e
s
s
a
g
e
[
15,
19,
20,
21,
22,
23]
t
h
a
t
po
s
s
i
bl
y
i
nf
l
u
e
n
c
i
ng
t
h
e
qu
a
l
i
t
y
pe
r
f
or
m
a
n
c
e
of
e
f
f
e
c
t
i
v
e
n
e
s
s
t
e
c
hni
q
ue
.
2.
I
n t
e
r
m
o
f
s
e
c
ur
i
t
y t
he
w
o
r
d
-
r
u
le
b
a
s
e
d
te
c
h
n
iq
u
e
h
a
s
e
v
a
l
u
a
tio
n
d
r
a
w
b
a
c
k
i
n
c
o
n
f
id
e
n
tia
lit
y
th
a
t
c
la
i
m
h
a
s
l
o
w
s
e
c
u
r
i
t
y
i
n
e
m
be
ddi
ng
t
h
a
t
pos
s
i
bl
e
c
a
n
be
de
t
e
c
t
by
t
hi
r
d
pa
r
t
y
[
5,
14]
.
I
n
a
v
a
i
l
a
bi
l
i
t
y
s
o
m
e
t
ech
n
i
q
u
es
i
s
eas
y
t
o
at
t
ack
t
h
at
p
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s
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bl
y
m
a
k
e
h
i
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n
m
e
s
s
a
g
e
l
os
t
a
f
t
e
r
e
m
be
ddi
ng
pr
oc
e
s
s
[
14]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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o
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s
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a
n J
E
l
e
c
E
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&
C
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p
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SSN
:
2502
-
4752
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v
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751
4.
F
EA
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eat
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f
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he
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t
ech
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n
in
f
o
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m
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in
th
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s
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ex
t
[
5
]
.
T
h
en
,
d
u
e t
o
t
h
e ch
ar
act
er
i
s
t
i
c o
f
t
h
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s
t
ech
n
i
q
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f
e
at
u
r
e
-
b
as
ed
h
as
u
s
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b
y
m
a
n
y
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ch
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s
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as
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ch
ar
act
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f
l
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g
u
ag
e i
n
t
h
e
w
o
r
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d
n
a
m
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l
an
g
u
a
g
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b
a
s
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d
.
I
n t
hi
s
p
a
p
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r
,
t
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l
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b
a
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d
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ab
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m
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m
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T
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h
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qu
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J
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s
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E
v
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lu
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d
(
E
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u
a
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e
)
1
.
Ma
c
h
in
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tr
a
n
s
l
a
tio
n
[
2
4]
T
r
a
n
s
l
a
te
s
t
h
e
tr
a
n
s
m
it
te
d
t
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.
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s
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k
ey
id
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to
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tio
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.
In
e
f
f
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ti
v
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s
:
H
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2
.
Ma
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k
u
p
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tte
r
[
2
5]
M
a
r
k
u
p
l
et
t
er
r
es
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l
v
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h
e s
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r
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b
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t
h
e f
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a
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b
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m
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t
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I
n
s
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c
u
r
ity
(
in
te
g
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ity
)
:
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o
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c
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d
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d
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s
s
a
g
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3
.
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et
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t
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n
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a
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c
o
d
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f
o
r
e
m
b
e
d
d
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n
g
(
SSC
E
)
[
2
6]
S
u
b
s
t
i
t
u
t
e
vo
w
e
l
s
a
n
d
c
on
s
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d
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m
m
a
t
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c
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en
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e f
o
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ex
t
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d
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d
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m
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[
2
7]
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m
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[
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[
2
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[
2
9]
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Ar
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3
3]
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3
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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02
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4752
I
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11
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2018
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[
3
5]
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[
3
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T
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3
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[
3
9]
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[
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[
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[
7
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E
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H
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[
4
3]
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d
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s
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d
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b
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b
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s
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o
r
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a
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l
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n
v
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n
m
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n
t
2
3
H
u
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f
m
a
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C
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p
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s
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n
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n
E
m
ai
l
B
as
e
d
[
4
4]
S
e
t
t
h
e
h
i
d
d
e
n
m
e
s
s
a
ge
i
n f
o
u
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f
on
t
s
b
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f
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b
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I
n
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f
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t
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v
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s
:
O
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a
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v
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m
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2
4
A
l
p
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b
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P
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T
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[
2
]
A
r
r
a
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g
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i
t
h
ac
r
o
s
s
t
h
e m
es
s
a
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h
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c
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s
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f
4
p
a
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ts
t
h
a
t
h
a
v
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2
b
in
a
r
y
b
its
I
n
ef
f
ec
t
i
v
en
es
s
:
A
l
g
o
r
i
t
h
m
C
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m
p
l
ex
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n
d
D
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p
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g
w
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t
h
A
S
C
I
I
.
B
a
s
e
d
o
n
T
a
b
le
2
,
it is
s
h
o
w
e
d
th
e
lis
t o
f
f
e
a
tu
r
e
-
b
as
ed
t
ec
h
n
i
q
u
e t
h
at
an
a
l
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s
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t
h
e p
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f
o
r
m
a
n
ce i
n
t
er
m
o
f
e
f
f
ect
i
v
e
n
es
s
an
d
s
ec
u
r
i
t
y
:
1.
I
n
t
er
m
o
f
e
f
f
ect
i
v
en
e
s
s
p
er
f
o
r
m
a
n
ce
f
eat
u
r
e
-
b
a
s
e
d
t
e
c
h
ni
q
ue
s
,
t
he
r
e
vi
e
w
o
f
e
va
l
ua
t
i
o
n
h
a
s so
m
e
dr
a
w
ba
c
k
s
u
c
h
a
s
i
t
h
a
s
pr
o
bl
e
m
i
n
a
l
g
or
i
t
hm
de
v
e
l
op
m
e
n
t
[
25]
,
[
36]
,
[
38
]
,
de
pe
n
da
bl
e
w
i
t
h
s
o
m
e
re
q
u
i
re
m
e
n
t
[6
,
2
8
,
30
]
,
a
n
d
s
o
m
e
t
e
c
hn
i
qu
e
onl
y
a
bl
e
t
o
u
s
e
i
n
s
o
m
e
e
nv
i
r
onm
e
n
t
[
43,
44]
T
h
os
e
a
r
e
e
va
l
ua
t
i
o
n i
t
i
s
p
o
s
s
i
b
l
y
i
n
f
l
ue
nc
i
n
g t
he
q
ua
l
i
t
y p
e
r
f
o
r
m
a
n
ce
o
f
ef
f
ect
i
v
en
e
s
s
t
ec
h
n
i
q
u
e.
2.
I
n
s
ec
u
r
i
t
y
,
t
h
e
ev
al
u
at
i
o
n
p
er
f
o
r
m
a
n
ce o
f
f
eat
u
r
e
-
ba
s
e
d t
e
c
hn
i
qu
e
h
a
s
qu
i
t
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s
i
m
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l
a
r
w
i
t
h
w
or
d r
u
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ba
s
e
d
l
i
k
e co
n
f
i
d
en
t
i
al
i
t
y
t
h
at
cl
ai
m
l
o
w
s
ec
u
r
i
t
y
an
d
eas
y
t
o
d
et
ect
o
f
h
i
d
d
en
m
es
s
ag
e e
x
i
s
t
i
n
t
h
e t
ex
t
[
7
,
2
7
,
33,
3
5,
4
1
]
.
T
he
n,
i
n
s
e
c
ur
i
t
y
a
b
o
ut
vi
a
b
i
l
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t
y
c
o
m
p
o
ne
nt
t
h
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xi
s
t
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nc
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s
c
r
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t
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c
a
l
ha
s
t
he
p
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b
l
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m
w
h
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l
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r
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t
y
pi
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pr
oc
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s
s
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a
k
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t
h
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h
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d
de
n
m
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s
s
a
g
e
l
os
t
or
do n
ot
e
x
i
s
t
t
h
e
t
e
x
t
[
31,
32,
38]
.
5.
CO
NCL
U
S
I
O
NS
T
hi
s
p
a
p
e
r
i
s
e
va
l
ua
t
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t
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c
a
t
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go
r
y
o
f
t
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t
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x
t
s
t
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ga
n
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r
a
phy
t
h
a
t
c
o
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s
i
s
t
s
o
f
t
w
o
g
r
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t
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a
t
a
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e
wo
r
d
-
r
u
l
e b
as
ed
a
n
d
f
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b
as
ed
t
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n
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q
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.
I
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d
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t
i
f
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b
o
t
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n
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q
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e
s
w
h
er
e t
h
e
w
o
r
d
-
r
u
l
e b
as
ed
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u
ag
e
-
b
as
ed
a
n
d
l
et
t
er
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b
as
ed
.
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h
i
s
p
ap
er
ev
al
u
at
es
t
h
e
p
er
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o
r
m
a
n
ce o
f
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o
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e
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ech
n
i
q
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er
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s
o
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e
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ect
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n
d
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ec
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r
i
t
y
.
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t
i
s
b
ec
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s
e
t
h
e
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al
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at
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o
n
o
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e
f
f
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s
e
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l
t
o
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s
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ov
e
r
pr
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v
e
l
opm
e
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t
pr
oc
e
s
s
of
t
e
c
h
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i
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O
n
t
h
e o
t
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er
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a
n
d
,
t
h
e s
ec
u
r
i
t
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s
p
er
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m
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ce ar
e co
n
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t
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o
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o
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f
i
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e
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t
i
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l
i
t
y,
i
nt
e
gr
i
t
y
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a
nd
a
va
i
l
a
b
i
l
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t
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w
h
i
c
h
ha
ve
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n e
va
l
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e
d
i
n o
r
d
e
r
t
o
a
na
l
y
s
e
t
he
e
xi
s
t
e
nc
e
s
o
h
hi
d
d
e
n
m
e
s
s
a
ge
.
T
hus
,
i
n
f
ut
u
r
e
w
o
r
k,
i
t
i
s
a
nt
i
c
i
p
a
t
e
d
t
ha
t
a
t
e
xt
s
t
e
ga
no
gr
a
p
hy
t
e
c
h
ni
que
w
i
l
l
be
de
v
e
l
ope
d
w
h
i
c
h
h
a
s
p
r
o
p
er
p
er
f
o
r
m
a
n
ce
b
as
ed
o
n
ev
al
u
at
i
o
n
o
f
t
h
e ef
f
ect
i
v
e
n
es
s
a
n
d
s
ec
u
r
i
t
y
.
ACK
NO
W
L
E
DE
M
E
N
T
W
e
w
ou
l
d
l
i
k
e
t
h
a
nk
t
o
P
r
of
.
D
r
.
H
u
da
I
br
a
h
i
m
,
D
e
a
n
of
S
c
h
ool
of
C
o
m
pu
t
i
ng
,
U
n
i
v
e
r
s
i
t
i
U
t
a
r
a
M
a
la
y
s
ia
(
S
o
C
C
A
S
U
U
M
)
an
d
D
i
r
ect
o
r
o
f
A
w
a
n
g
H
ad
S
al
l
eh
G
r
ad
u
at
e
S
ch
o
o
l
(
A
H
S
G
S
)
f
o
r
t
h
e
i
r
m
o
r
a
l
s
u
p
p
o
r
t
f
o
r
t
h
e r
eal
i
zat
i
o
n
o
f
t
h
i
s
w
o
r
k
.
T
h
i
s
r
es
ear
ch
i
s
j
o
i
n
t
l
y
s
u
p
p
o
r
t
ed
b
y
t
h
e F
u
n
d
a
m
e
n
t
al
R
es
ear
ch
G
r
an
t
S
ch
e
m
e (
F
R
G
S
)
,
Mo
H
E
u
n
d
er
S
O
C
o
d
e 1
3
5
7
6
U
n
i
v
er
s
i
t
i
U
t
ar
a M
al
a
y
s
i
a
a
n
d V
ot
1557 U
n
i
v
e
r
s
i
t
i
T
u
n
H
us
s
e
i
n O
n
n M
a
l
a
ys
i
a
.
R
EF
ER
EN
C
ES
[
1
]
M
M
A
m
i
n,
S
I
bha
r
a
hi
m
,
M
S
al
l
eh
,
MR
K
a
t
m
i
n,
“
I
nf
or
m
a
t
i
on us
i
ng
s
t
e
g
a
nog
r
a
phy
”
.
Re
s
e
a
rc
h
re
p
o
rt
,
U
n
i
v
e
rs
i
t
i
T
e
k
nol
og
i
M
a
l
a
y
s
i
a
,
J
ohor
B
a
hr
u
,
M
a
l
a
y
s
i
a
,
2003.
[
2
]
SS
I
ye
r
,
K
L
ak
t
ar
i
a
,
“
N
e
w
r
obus
t
a
nd s
e
c
ur
e
a
l
p
ha
be
t
pa
i
r
i
ng
t
e
x
t
s
t
e
g
a
nog
r
a
phy
a
l
g
or
i
t
hm
”
.
I
nt
e
r
nat
i
o
nal
J
our
na
l
of
C
ur
r
e
nt
T
r
e
nds
i
n
E
n
gi
ne
e
r
i
n
g
&
R
e
s
e
ar
c
h
,
201
6
;
2(
7)
:
15
–
21
.
[
3
]
C Ch
a
n
g
,
S
Cl
a
rk
,
“
P
r
ac
t
i
c
al
l
i
n
gui
s
t
i
c
s
t
e
ga
no
gr
ap
hy
us
i
ng
c
on
t
e
x
t
ual
Sy
no
ny
m
S
ubs
t
i
t
ut
i
on
a
nd
V
er
t
ex C
o
l
o
u
r
C
odi
ng
”
.
P
r
oc
e
e
di
ng
s
of
t
he
C
o
n
f
er
en
ce o
n
E
m
p
i
r
i
cal
M
et
h
o
d
s
i
n
N
at
u
r
al
L
an
g
u
ag
e P
r
o
ces
s
i
n
g
,
20
10
:
11
94
-
12
03
.
[
4
]
R
K
u
m
ar
,
A
M
al
i
k
,
S
S
i
n
g
h
,
S
C
ha
nd,
“
A
h
i
g
h c
ap
ac
i
t
y
e
m
ai
l
b
as
e
d t
e
x
t
s
t
e
gan
ogr
a
phy
s
c
he
m
e
us
i
ng
huf
f
m
a
n
c
o
mp
re
ssi
o
n
”.
3
rd
I
nt
e
r
na
t
i
ona
l
C
onf
e
r
e
nc
e
on S
i
g
na
l
P
r
oc
e
s
s
i
ng
a
nd I
nt
e
g
r
a
t
e
d
N
e
t
w
o
rk
s
(S
P
IN
),
20
1
4:
53
-
56
.
[
5
]
S
R
o
y,
M
M
an
as
m
i
t
i
,
“A
n
o
v
el
a
p
p
r
o
ach
t
o
f
o
r
m
at
b
as
ed
s
t
eg
an
o
g
r
ap
h
y
”.
ICCCS
’1
1
,
20
11
: 5
1
1
-
5
17
.
[
6
]
S
B
h
at
t
ach
ar
y
a,
P
I
n
d
u
,
D
u
t
a,
S
A
B
i
s
w
as
,
G
S
a
n
y
a
l,
“
H
id
in
g
d
a
ta
in
te
x
t th
r
o
u
g
h
i
n
a
lp
h
a
b
e
t
le
tte
r
p
a
tte
r
n
s
(CA
L
P
)”
.
J
our
nal
of
G
l
ob
al
R
e
s
e
ar
c
h i
n
C
om
p
ut
e
r
Sc
i
e
nc
e
,
20
11
;
2(
3)
:
33
-
3
9.
[
7
]
S
D
u
l
er
a,
D
J
i
n
w
al
a,
A
D
a
s
g
upt
a
,
“
E
x
pe
r
i
m
e
nt
i
ng
w
i
t
h t
he
nov
e
l
a
ppr
oa
c
he
s
i
n t
e
x
t
s
t
e
g
a
nog
r
a
phy
”
.
I
n
t
e
r
na
t
i
on
al
Jo
u
r
n
a
l
o
f
N
et
w
o
r
k S
ecu
r
i
t
y &
I
ts
Ap
p
lic
a
ti
o
n
s
,
20
11
;
3(
6)
:
21
3
-
225
.
[
8
]
A Od
e
h
,
A
A
l
z
u
b
i
,
QB
Ha
n
i
,
Q,
K
Elle
ith
y
,
“
S
te
g
a
n
o
g
r
a
p
h
y
b
y
m
u
ltip
o
in
t A
r
a
b
ic
le
tte
r
s
.
S
y
s
te
m
s
,
A
p
p
lic
a
tio
n
s
an
d
T
ech
n
o
l
o
g
y
C
o
n
f
er
en
ce (
L
I
S
A
T
)
”,
I
E
E
E
L
o
n
g
I
s
l
a
n
d
,
20
12
: 1
-
7
.
[
9
]
P
K
R Re
d
d
y
,
C N
a
g
a
ra
j
u
,
N
S
u
b
r
a
ma
n
y
a
m,
“
T
e
x
t
e
nc
r
y
pt
i
on t
hr
oug
h
l
e
v
e
l
ba
s
e
d pr
i
v
a
c
y
us
i
ng
D
N
A
s
t
e
g
a
nog
r
a
phy
”
.
I
nt
e
r
nat
i
on
al
J
o
ur
nal
o
f
E
m
e
r
gi
ng
T
r
e
nds
&
T
e
c
hno
l
o
gy
i
n
C
om
put
e
r
Sc
i
e
nc
e
(
I
J
E
T
T
C
S)
,
20
14
;
3
(
3
)
:
1
68
-
17
2
.
[
1
0]
X
S
u
n
,
P
M
e
n
g
, Y
Y
e
, L
H
a
n
g,
“
St
e
g
an
ogr
a
phy
i
n C
hi
ne
s
e
t
e
x
t
”
.
I
nt
e
r
na
t
i
ona
l
C
on
f
er
en
ce o
n
C
o
m
p
u
t
er
A
p
p
lic
a
tio
n
a
n
d
S
y
s
te
m
M
o
d
e
lin
g
(
I
C
C
AS
M
),
201
0
; 8
:
6
5
1
-
65
5.
[
1
1]
P
r
o
d
u
ct
i
v
i
t
y
C
o
m
m
i
s
s
i
o
n
S
t
af
f
R
es
ear
ch
N
o
t
e,
“O
n
e
f
f
i
ci
en
c
y
a
n
d
ef
f
ect
i
v
en
es
s
:
s
o
m
e d
e
f
i
n
i
t
i
o
n
”.
P
r
o
d
u
c
tiv
ity
C
om
m
i
s
s
i
on,
20
12
: 1
-
14
.
[
1
2]
M
H Jo
p
r
i
,
A
R
A
bdul
l
a
h,
M
M
a
na
p,
M
R
Y
us
of
f
,
T
S
ut
i
k
no,
M
F
H
a
bba
n,
“
A
n I
m
pr
ov
e
d D
e
t
e
c
t
i
on a
nd
C
la
s
s
if
ic
a
tio
n
T
e
c
h
n
iq
u
e
o
f
H
a
r
m
o
n
ic
S
ig
n
a
ls
in
P
o
w
e
r
D
is
tr
ib
u
tio
n
b
y
U
tiliz
in
g
S
p
e
c
tr
o
g
r
a
m
”
,
I
nt
e
r
nat
i
on
a
l
J
our
n
al
o
f
E
l
e
c
t
r
i
c
al
an
d C
om
pu
t
e
r
E
ngi
ne
e
r
i
ng (
I
J
E
C
E
)
,
20
17
;
7
(
1
):
12
-
20
.
[
1
3]
M
K
at
h
u
r
i
a,
S
G
a
m
bhi
r
,
“
I
m
pr
ov
e
m
e
nt
of
Q
ua
l
i
t
y
o
f
S
e
r
v
i
c
e
P
a
r
a
m
e
t
e
r
s
i
n D
y
na
m
i
c
a
nd H
e
t
e
r
og
e
ne
ous
W
B
A
N
”,
I
nd
one
s
i
a
n J
o
ur
na
l
o
f
E
l
e
c
t
r
i
c
al
E
ngi
ne
e
r
i
ng
an
d I
nf
or
m
at
i
c
s
(
I
J
E
E
I
)
.
20
16
;
4
(
4
)
:
29
9
-
3
06
.
[
1
4]
M
V Na
sa
b
,
B
M
S
h
af
i
ei
,
“
S
t
e
g
a
nog
r
a
phy
i
n pr
og
r
a
m
m
i
ng
”
.
A
us
t
r
al
i
a
n J
o
ur
n
al
of
B
as
i
c
an
d A
pp
l
i
e
d S
c
i
e
nc
e
s
,
200
9
;
5(
1
2)
:
14
96
-
1
49
9.
[
1
5]
P
M
ah
aj
an
,
H
G
upt
a
,
“
I
m
pr
ov
i
s
i
on
of
s
e
c
ur
i
t
y
i
n
i
m
a
ge
s
t
e
ga
no
gr
ap
hy
us
i
ng D
W
T
,
H
uf
f
m
a
n e
n
c
odi
n
g &
R
C
4
bas
e
d L
SB
e
m
be
ddi
ng
”.
3
rd
I
n
t
e
r
na
t
i
ona
l
C
o
nf
e
r
e
nc
e
on C
om
put
i
ng
f
or
S
us
t
a
i
na
bl
e
G
l
o
b
al
D
ev
e
lo
p
m
e
n
t
(IN
D
IA
Co
m
),
2016
: 5
2
3
-
5
29
.
[
1
6]
S
D
T
o
r
vh
i
,
K
B
S
h
i
va
ku
m
a
r
,
R
Da
s,
“
A
n uni
q
ue
dat
a s
e
c
ur
i
t
y
us
i
ng t
e
x
t
s
t
e
ga
no
gr
ap
hy
”.
3
rd
I
n
t
er
n
at
i
o
n
al
C
onf
e
r
e
nc
e
on C
om
put
i
ng
f
or
S
u
s
t
a
i
na
bl
e
G
l
oba
l
D
e
v
e
l
o
p
m
e
n
t
(IN
D
IA
Co
m
).
2016
:
38
34
-
38
38
.
[
1
7]
A
M
o
h
am
ed
D
i
v
an
M
a
s
ood
,
S
K
M
ut
hus
un
da
r
,
“
C
r
y
pt
og
r
a
phi
c
H
a
s
hi
ng
M
e
t
h
od
us
i
ng
f
or
S
e
c
ur
e
a
nd
S
im
ila
r
it
y
D
e
t
e
c
tio
n
in
D
is
tr
i
b
u
t
e
d
C
lo
u
d
D
a
ta
”
,
I
nd
one
s
i
an J
o
ur
nal
of
E
l
e
c
t
r
i
c
al
E
n
gi
ne
e
r
i
n
g
an
d C
om
p
ut
e
r
S
ci
en
ce
.
20
18;
9
(
1
):
1
07
-
1
10.
[
1
8]
D
P
opa
,
E
S
im
io
n
,
“
E
n
ha
nc
i
n
g s
e
c
ur
i
t
y
c
om
bi
ni
n
g
bi
om
e
t
r
i
c
s
a
nd c
r
y
pt
ogr
a
phy
”.
I
n
t
er
n
at
i
o
n
al
C
o
n
f
er
en
ce o
n
E
l
ect
r
o
n
i
cs
,
C
o
m
p
u
t
er
s
an
d
A
r
t
i
f
i
ci
l
a I
n
t
el
eg
en
ce (
E
C
A
I
)
.
2017
: 1
-
7
.
[
1
9]
H
S
i
n
g,
P
K
S
i
n
g,
K
S
o
r
ah
a,
“
A
Sur
v
e
y
on t
e
x
t
s
t
e
gano
gr
a
p
hy
”.
P
r
o
ceed
i
n
g
o
f
3
rd
Na
t
i
ona
l
C
onf
e
r
e
nc
e
;
IN
D
IA
Co
m
-
C
o
m
put
i
ng
f
or
N
a
t
i
o
n D
e
v
e
l
opm
e
nt
,
20
09
: 1
-
6
.
[
2
0]
L
L
i
, L
H
u
a
n
g
, X
Z
h
a
o
, W
Y
a
n
g,
Z
C
he
n,
“
A s
t
a
tis
tic
a
l a
tt
a
c
k
o
n
k
in
d
o
f w
o
r
d
-
s
hi
f
t
t
e
x
t
s
t
e
gan
ogr
ap
hy
”
.
I
nt
e
r
na
t
i
o
na
l
C
onf
e
r
e
nc
e
on I
n
t
e
l
l
i
g
e
nt
I
nf
or
m
a
t
i
on H
i
di
ng
a
n
d M
u
l
t
i
m
e
di
a
S
i
g
na
l
P
r
oc
e
s
s
i
ng
,
20
08
:
15
03
-
15
07
.
[
2
1]
M
L
i
u,
Y
G
uo,
L
Z
h
ou,
“
T
e
x
t
s
t
e
gan
ogr
ap
hy
b
as
e
d o
n
onl
i
ne
c
ha
t
” .
F
if
th
I
n
te
r
n
a
tio
n
a
l C
o
n
f
e
r
e
n
c
e
o
n
I
n
te
llig
e
n
t
I
n
f
o
r
m
a
tio
n
H
id
in
g
a
n
d
M
u
ltim
e
d
ia
S
i
g
n
al
P
r
o
ces
s
i
n
g
,
20
09
:
8
07
-
811
.
[
2
2]
H Ya
n
g
,
A
C
Ko
t
,
“
T
e
x
t
d
oc
um
e
n
t
a
ut
he
n
t
i
f
i
c
at
i
o
n B
y
i
nt
e
gr
at
i
ng
i
nt
e
r
c
har
a
c
t
e
r
an
d
pp
ac
e
w
at
e
r
m
ar
k
i
ng
”.
I
E
E
E
I
nt
e
r
na
t
i
o
na
l
C
onf
e
r
e
nc
e
on M
ul
t
i
m
e
di
a
a
nd
E
x
p
o
(ICM
E
).
20
04:
955
-
9
59.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
25
02
-
4752
I
nd
o
ne
s
i
a
n J
E
l
e
c
E
ng
&
C
o
m
p
S
c
i
,
V
o
l.
11
, N
o
.
2
,
A
ug
us
t
2018
:
7
47
–
754
754
[
2
3]
A
A
lta
g
a
n
i,
B
B
a
r
y,
“
A
hy
br
i
d
appr
oac
h t
o s
e
c
ur
e
t
r
ans
m
i
t
t
e
d
m
e
s
s
age
s
us
i
ng a
dv
a
nc
e
d e
nc
r
y
pt
i
o
n s
t
a
nd
ar
d
(
A
E
S)
an
d w
or
d
-
s
hi
f
t
c
od
i
n
g p
r
ot
oc
ol
”
.
I
nt
e
r
na
t
i
ona
l
C
o
nf
e
r
e
nc
e
on C
om
put
i
ng
,
E
l
e
c
t
r
i
c
a
l
,
a
nd E
l
e
c
t
r
oni
c
E
n
g
i
n
e
e
ri
n
g
(ICCE
E
).
20
13
:
13
4
-
140
.
[
2
4]
R
S
tu
ts
m
a
n
,
M
J
A
ta
lla
h
,
C
G
r
o
th
o
f
f
,
K
G
r
ot
hof
f
,
“
L
o
s
t in
ju
s
t
tr
a
n
s
la
tio
n
”
,
P
r
oc
e
e
di
ng
of
t
he
2
1
st
An
n
u
a
l
AC
M
S
y
m
pos
i
u
m
on A
ppl
i
e
d c
om
put
i
n
g
(
S
A
C
)
,
D
ijo
n
,
F
r
an
c
e
,
20
06
:
338
-
34
5
.
[
2
5]
X
G S
u
i
,
H
L
uo,
“
A
N
e
w
s
t
e
ga
nog
r
a
phy
m
e
t
hod ba
s
e
d on H
y
pe
r
t
e
x
t
”
N
at
i
on
al
K
e
y
L
ab of
M
ode
r
n Si
g
na
l
P
r
oc
e
s
s
i
ng,
So
ut
hw
e
s
t
I
ns
t
o
f
e
l
e
c
t
r
on &
t
e
l
c
om
,
200
4
:
1
81
-
18
4
.
[
2
6]
I
B
an
er
j
ee,
S
B
h
at
t
ach
ar
y
a,
G
S
yn
a
l
,
“
N
ov
e
l
t
e
x
t
s
t
e
gano
gr
a
phy
t
hr
ou
gh
s
p
eci
a
l
co
d
e g
en
er
a
t
i
o
n
”
.
I
n
t
er
n
at
i
o
n
al
C
o
n
f
er
en
ce S
y
s
t
e
m
at
i
c,
C
y
b
er
m
e
t
i
cs
an
d
I
n
f
o
r
m
at
i
cs
,
201
1
:
2
98
-
30
3
.
[
2
7]
A
O
de
h,
E
K
ha
l
e
d,
M
F
eazi
p
o
u
r
,
“
T
e
x
t
s
t
e
gan
ogr
ap
hy
us
i
n
g
l
an
gu
age
r
e
m
ar
k
s
”.
A
S
E
E
N
o
r
t
h
e
as
t
S
ect
i
o
n
C
o
n
f
er
en
ce,
201
3
: 1
-
7
.
[
2
8]
A
O
de
h,
E
K
ha
l
e
d,
M
F
eazi
p
o
u
r
,
“
St
e
ga
no
gr
a
phy
i
n t
e
x
t
by
us
i
ng M
S W
or
d s
y
m
bo
l
s
”.
P
r
o
ceed
i
n
g
o
f
zo
n
e 1
co
n
f
er
en
ce o
f
t
h
e A
m
er
i
can
S
o
ci
et
y
E
n
g
i
n
eer
i
n
g
E
d
u
cat
i
o
n
,
20
14
:
1
-
5
.
[
2
9]
S
K
at
ar
i
a,
K
S
i
n
g
,
T
K
u
m
ar
,
M
S
N
eh
r
a,
“
E
C
R
(
E
nc
r
y
pt
i
on
w
i
t
h C
ov
e
r
T
e
x
t
and R
e
or
de
r
i
ng)
b
as
e
d t
e
x
t
s
t
e
gan
o
gr
a
phy
”
.
P
r
oc
e
e
di
ng
of
t
he
I
E
E
E
S
e
c
ond
I
nt
e
r
na
t
i
o
na
l
C
onf
e
r
e
nc
e
on I
m
a
ge
I
nf
or
m
a
t
i
on
P
r
oc
e
s
s
i
ng
(ICIIP
-
20
13
)
.
20
13
:
6
12
-
61
6.
[
3
0]
AAA
G
u
t
u
b
,
M
M
F
at
t
ah
.
“
A
nov
e
l
A
r
a
bi
c
t
e
x
t
s
t
e
ga
nog
r
a
phy
m
e
t
hod us
i
ng
l
e
t
t
e
r
poi
nt
a
nd e
x
t
e
nt
i
on
”
.
I
nt
e
r
nat
i
o
nal
J
our
n
al
of
C
om
p
ut
e
r
,
I
nf
or
m
at
i
o
n,
Sy
s
t
e
m
s
an
d C
o
nt
r
ol
E
n
gi
ne
e
r
i
ng
,
20
07
:
1(
3)
:
48
3
-
486
.
[
3
1]
A
O
de
h,
A
A
lz
u
b
i,
Q
B
.
H
a
n
i,
K
Elle
ith
y
.
“
S
te
g
a
n
o
g
r
a
p
h
y
b
y
m
u
ltip
o
i
n
t A
r
a
b
ic
le
tte
r
s
”
.
S
y
st
e
ms,
A
ppl
i
c
at
i
o
ns
a
nd
T
ech
nol
ogy
C
onf
e
r
e
nc
e
(
L
I
SA
T
)
,
I
E
E
E
L
o
n
g
I
s
l
a
n
d
,
20
12
: 1
-
7
.
[
3
2]
J
A
M
e
m
on,
K
K
how
a
j
a
,
H
K
azi
,
“E
v
al
u
at
i
o
n
o
f
s
t
eg
an
o
g
r
ap
h
y
f
o
r
U
r
d
u
/
A
r
ab
i
c t
ex
t
”.
J
our
n
al
o
f
T
he
or
e
t
i
c
al
a
n
d
A
ppl
i
e
d I
n
f
or
m
at
i
o
n T
e
c
h
nol
ogy
,
200
8
:
2
32
-
23
7
.
[
3
3]
M
T
a
lip
,
A
J
a
m
a
l,
G
W
Qi
a
n
g,
”
A
pr
op
os
e
d s
t
e
ga
no
gr
a
phy
m
e
t
h
o
d t
o U
y
gh
ur
s
c
r
i
pt
”.
I
n
t
er
n
at
i
o
n
al
C
o
n
f
er
en
ce o
n
C
yb
e
r
-
E
na
bl
e
d D
i
s
t
r
i
b
ut
e
d C
om
put
i
ng
a
nd
K
n
o
w
l
ed
g
e D
i
s
co
v
er
,
201
2
:
1
25
-
12
8
.
[
3
4]
W
Z
h
a
n
g
, Z
Z
h
e
n
g
, G
P
u
,
H
Zh
u
o
.
“
C
hi
ne
s
e
t
e
x
t
w
at
e
r
m
ar
k
i
n
g bas
e
d on oc
c
l
us
i
v
e
c
om
p
one
n
t
s
”
. 2
nd
I
nf
or
m
a
t
i
on
a
nd C
om
m
uni
c
a
t
i
on T
e
c
hnol
og
i
e
s
(
I
C
T
T
A
)
,
200
6.
[
3
5]
X
S
u
n
,
P
M
en
g
,
Y
Y
e,
L
H
an
g
.
“
St
e
ga
no
gr
a
phy
i
n C
hi
ne
s
e
t
e
x
t
”.
I
nt
e
r
na
t
i
o
na
l
C
o
nf
e
r
e
nc
e
on
C
om
put
e
r
A
p
p
lic
a
tio
n
a
n
d
S
y
s
te
m
M
o
d
e
lin
g
(
I
C
C
AS
M
).
201
0
; 8
:
6
5
1
-
65
5.
[
3
6]
S
C
D
G
hos
h,
N
C
D
e
bna
t
h.
“
L
C
S bas
e
d
t
e
x
t
s
t
e
ga
no
gr
a
phy
t
hr
ou
g
h I
nd
i
a
n l
a
ng
ua
ge
s
”
.
I
nt
e
r
na
t
i
ona
l
C
onf
e
r
e
nc
e
on
C
om
put
e
r
T
e
c
hnol
og
y
a
nd D
e
v
e
l
opm
e
nt
.
20
10
:
53
-
57
.
[
3
7]
S
C
ha
ng
de
r
,
N
C
D
e
b
na
t
h,
D
G
ho
s
h,
“
A
ne
w
ap
pr
oac
h t
o
hi
n
di
t
e
x
t
s
t
e
ga
no
gr
ap
hy
by
s
hi
f
t
i
n
g m
at
r
a
”
.
I
nt
e
r
na
t
i
ona
l
C
onf
e
r
e
nc
e
on A
dv
a
nc
e
s
i
n
R
e
c
e
nt
T
e
c
hnol
og
i
e
s
i
n C
om
m
u
ni
c
a
t
i
on a
nd
C
om
put
i
ng
.
20
09
:
1
99
-
20
2
.
[
3
8]
M
P
a
t
ha
k
,
“
A
ne
w
a
ppr
oa
c
h f
or
t
e
x
t
s
t
e
g
a
nog
r
a
phy
us
i
ng
H
i
ndi
n
um
e
r
i
c
a
l
c
ode
”
.
I
nt
e
r
nat
i
o
nal
J
our
nal
of
C
om
put
e
r
A
pp
l
i
c
at
i
on
.
20
10
;
1
(
8
):
56
-
59
.
[
3
9]
S
S
C
Da
s,
G
D
e
bna
t
h,
“
T
e
x
t
s
t
e
g
ano
gr
a
phy
t
hr
o
u
g
h I
n
di
a
n l
an
gu
age
us
i
ng
f
e
at
ur
e
c
odi
ng m
e
t
hod
”
.
I
nt
e
r
na
t
i
ona
l
C
onf
e
r
e
nc
e
on C
om
put
e
r
T
e
c
hno
l
ogy
a
nd D
e
v
e
l
opm
e
nt
(
I
C
C
T
D
)
.
201
0
; 2
: 5
0
1
-
50
6
.
[
4
0]
M
N
A
l
a
m,
M
A
N
as
er
,
“
R
e
-
e
v
al
uat
i
ng C
ha
i
n
-
C
ode
as
a F
e
at
ur
e
B
an
gl
a
Sc
r
i
pt
”.
I
n
t
er
n
at
i
o
n
al
C
o
n
f
er
en
ce o
n
E
l
ect
r
i
cal
I
n
f
or
m
a
t
i
on a
n
d C
om
m
uni
c
a
t
i
o
n T
e
c
hnol
og
y
(
E
I
C
T
)
.
2013
: 1
-
5
.
[
4
1]
T
P
N
ag
ar
h
al
l
i
,
J
W
B
ak
al
,
N
J
ai
n
,
“A
S
u
r
v
e
y
o
f
H
i
n
d
i
t
ex
t
s
t
e
g
an
o
g
r
ap
h
y
”.
I
n
te
r
n
a
tio
n
a
l J
o
u
r
n
a
l o
f S
c
ie
n
tif
ic
&
E
ngi
ne
e
r
i
ng R
e
s
e
ar
c
h
.
20
16
;
7
(
3
):
55
-
6
1.
[
4
2]
S
M
ah
at
o
,
D
K
Y
ad
av
,
D
A
K
ha
n,
”
A
m
odi
f
i
e
d a
ppr
o
ac
h t
o t
e
x
t
s
t
e
gano
gr
a
phy
us
i
ng H
y
pe
r
T
e
x
t
m
ar
k
up l
a
ng
ua
ge
”.
T
hi
r
d I
nt
e
r
na
t
i
o
na
l
C
o
nf
e
r
e
nc
e
on A
dv
a
nc
e
d C
om
put
i
ng
&
C
om
m
un
i
cat
i
o
n
T
ech
n
o
l
o
g
i
es
.
20
12
:
40
-
44
.
[
4
3]
R K
u
m
a
r,
S
C
h
an
d,
S
S
in
g
,
“
A
n e
m
ai
l
b
as
e
d
hi
g
h c
a
pac
i
t
y
t
e
x
t
s
t
e
gan
ogr
a
phy
s
c
he
m
e
us
i
ng
c
o
m
bi
na
t
o
r
i
al
c
o
mp
re
ssi
o
n
”.
5
t
h
I
nt
e
r
na
t
i
ona
l
C
onf
e
r
e
nc
e
-
C
onf
l
ue
nc
e
T
he
N
e
x
t
G
e
ne
r
a
t
i
on I
nf
or
m
a
t
i
on T
e
c
hnol
og
y
S
u
m
m
it
(
C
onf
l
ue
nc
e
)
.
20
14
: 3
6
-
33
9.
[
4
4]
R
K
u
m
ar
,
A
M
al
i
k
,
S
S
i
n
gh
, S
C
ha
nd,
“
A
h
i
g
h c
ap
ac
i
t
y
e
m
ai
l
b
as
e
d t
e
x
t
s
t
e
gan
ogr
a
phy
s
c
he
m
e
us
i
ng
huf
f
m
a
n
c
o
mp
re
ssi
o
n
”.
3
rd
I
nt
e
r
na
t
i
ona
l
C
onf
e
r
e
nc
e
on S
i
g
na
l
P
r
oc
e
s
s
i
ng
a
nd I
nt
e
g
r
a
t
e
d
N
e
t
w
o
rk
s
(S
P
IN
).
2
014
:
53
-
56
.
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