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1
3
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2.
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ates t
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3.
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F
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WAR
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NT
AT
I
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3
.
1
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Appl
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un
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T
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alit
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Fi
g
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4
.
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h
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u
n
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s
o
f
t
h
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ap
p
licatio
n
,
n
a
m
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y
:
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n
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a
f
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to
i
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s
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f
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2
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t
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Fig
u
r
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.
5
.
On
t
h
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h
er
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ar
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alr
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d
y
m
en
u
s
f
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o
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,
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n
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s
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ap
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an
d
e
m
ail
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eli
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y
.
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ter
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p
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e
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al
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u
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RE
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ter
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.
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.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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d
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721
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ile
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t
r
a
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t
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Ty
p
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(
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)
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p
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(
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p
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0
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7
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5
√
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z
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p
0
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2
0
9
5.
C
ON
C
L
USI
ON
T
h
is
p
ap
er
h
as
p
r
esen
ted
an
i
m
ag
e
-
s
teg
a
n
o
g
r
ap
h
y
tec
h
n
i
q
u
e
to
co
n
ce
al
f
ile
b
lo
ck
ed
b
y
G
m
ail
.
T
h
e
E
OF
alg
o
r
ith
m
is
i
m
p
le
m
en
ted
b
y
i
n
s
er
ti
n
g
th
e
o
r
ig
i
n
al
f
ile
to
co
v
er
im
a
g
e
f
i
le.
R
es
u
lts
s
h
o
w
ed
th
at
t
h
e
g
en
er
ated
s
te
g
o
-
i
m
a
g
e
d
eliv
er
ed
s
u
cc
ess
f
u
ll
y
v
ia
G
m
ai
l
w
it
h
o
u
t
b
ein
g
b
lo
ck
ed
.
T
o
r
ed
u
ce
th
e
co
m
p
u
ta
tio
n
al
ti
m
e
an
d
th
e
f
in
a
l
f
ile
s
ize,
f
ir
s
t
t
h
e
o
r
ig
in
al
f
ile
w
as
co
m
p
r
e
s
s
ed
s
o
th
at
th
e
f
ile
s
iz
e
w
ill
b
e
s
m
aller
.
Var
io
u
s
test
in
g
w
er
e
co
n
d
u
cted
o
n
th
e
ap
p
licatio
n
i
n
ter
f
ac
e,
s
teg
a
n
o
p
r
o
ce
s
s
,
f
ile
s
e
n
d
i
n
g
,
a
n
d
u
n
s
te
g
an
o
p
r
o
ce
s
s
.
RE
F
E
R
E
NC
E
S
[1
]
F
.
J.
M
a
b
ry
,
J.
R.
Ja
m
e
s,
a
n
d
A
.
J.
F
e
rg
u
so
n
,
"
Un
ico
d
e
S
teg
a
n
o
g
r
a
p
h
ic
Ex
p
lo
it
s:
M
a
i
n
tain
i
n
g
En
te
rp
rise
Bo
rd
e
r
S
e
c
u
rit
y
,
"
IEE
E
S
e
c
u
rity
&
Priva
c
y
v
o
l.
5
,
p
p
.
3
2
-
3
9
,
2
0
0
7
.
[2
]
T
.
S
.
G
u
n
a
w
a
n
,
M
.
K.
L
i
m
,
N.
F
.
Zu
lk
u
rn
a
in
,
a
n
d
M
.
Ka
rti
w
i,
"
On
th
e
Re
v
ie
w
a
n
d
S
e
tu
p
o
f
S
e
c
u
rit
y
A
u
d
it
u
sin
g
Ka
li
L
in
u
x
,
"
In
d
o
n
e
sia
n
J
o
u
r
n
a
l
o
f
El
e
c
trica
l
En
g
in
e
e
rin
g
a
n
d
Co
mp
u
ter
S
c
ien
c
e
,
v
o
l
.
1
1
,
p
p
.
5
1
-
5
9
,
2
0
1
8
.
[3
]
J.
Ko
u
r
a
n
d
D.
V
e
rm
a
,
"
S
te
g
a
n
o
g
ra
p
h
y
T
e
c
h
n
iq
u
e
s
–
A
Re
v
ie
w
P
a
p
e
r,
"
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
Eme
rg
in
g
Res
e
a
rc
h
in
M
a
n
a
g
e
me
n
t
&
T
e
c
h
n
o
l
o
g
y
,
v
o
l.
3
,
p
p
.
1
3
2
-
1
3
5
,
2
0
1
4
.
[4
]
M
.
Ka
u
r
a
n
d
V
.
K.
S
h
a
rm
a
,
"
En
c
ry
p
ti
o
n
b
a
se
d
L
S
B
S
te
g
a
n
o
g
ra
p
h
y
T
e
c
h
n
iq
u
e
f
o
r
Dig
it
a
l
I
m
a
g
e
s
a
n
d
T
e
x
t
Da
ta,"
IJ
CS
NS
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
Co
mp
u
ter
S
c
ien
c
e
a
n
d
Ne
tw
o
rk
S
e
c
u
rity
,
v
o
l.
1
6
,
p
p
.
9
0
-
9
7
,
2
0
1
6
.
[5
]
M
.
Ra
m
k
u
m
a
r
a
n
d
A
.
N.
Ak
a
n
su
,
"
Ca
p
a
c
it
y
e
sti
m
a
tes
f
o
r
d
a
ta
h
id
in
g
in
c
o
m
p
re
s
se
d
i
m
a
g
e
s,
"
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Im
a
g
e
Pr
o
c
e
ss
in
g
,
v
o
l
.
1
0
,
p
p
.
1
2
5
2
-
1
2
6
3
,
2
0
0
1
.
[6
]
R.
J.
M
sta
f
a
,
K.
M
.
El
leit
h
y
,
a
n
d
E.
A
b
d
e
lf
a
tt
a
h
,
"
A
Ro
b
u
st
a
n
d
S
e
c
u
re
V
i
d
e
o
S
teg
a
n
o
g
ra
p
h
y
M
e
th
o
d
i
n
DW
T
-
DCT
Do
m
a
in
s Ba
se
d
o
n
M
u
lt
i
p
le Ob
jec
t
T
ra
c
k
in
g
a
n
d
ECC,
"
IEE
E
Acc
e
ss
,
v
o
l.
5
,
p
p
.
5
3
5
4
-
5
3
6
5
,
2
0
1
7
.
[7
]
M
.
Kh
o
d
a
e
i
a
n
d
K.
F
a
e
z
,
"
Ne
w
a
d
a
p
ti
v
e
ste
g
a
n
o
g
ra
p
h
ic
m
e
th
o
d
u
sin
g
lea
st
sig
n
if
ica
n
t
-
b
it
su
b
stit
u
t
io
n
a
n
d
p
ix
e
l
-
v
a
lu
e
d
if
fe
re
n
c
in
g
,
"
IET
Ima
g
e
P
ro
c
e
ss
in
g
v
o
l.
6
,
p
p
.
6
7
7
-
6
8
6
,
2
0
1
2
.
[8
]
A
.
T
i
w
a
ri,
S
.
R.
Ya
d
a
v
,
a
n
d
N.
K.
M
it
tal,
"
A
Re
v
ie
w
o
n
Diff
e
r
e
n
t
Im
a
g
e
S
teg
a
n
o
g
ra
p
h
y
T
e
c
h
n
iq
u
e
s,"
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
E
n
g
in
e
e
rin
g
a
n
d
I
n
n
o
v
a
ti
v
e
T
e
c
h
n
o
l
o
g
y
(
IJ
EIT
)
,
v
o
l.
3
,
p
p
.
1
2
1
-
1
2
4
,
2
0
1
4
.
[9
]
Ra
k
h
i
a
n
d
S
.
G
a
w
a
n
d
e
,
"
A
Re
v
ie
w
o
n
S
teg
a
n
o
g
ra
p
h
y
M
e
th
o
d
s,"
I
n
ter
n
a
ti
o
n
a
l
J
o
u
r
n
a
l
o
f
A
d
v
a
n
c
e
d
Res
e
a
rc
h
i
n
El
e
c
trica
l,
El
e
c
tro
n
ics
a
n
d
I
n
stru
me
n
ta
ti
o
n
E
n
g
in
e
e
rin
g
,
v
o
l.
2
,
p
p
.
4
6
3
5
-
4
6
3
8
,
2
0
1
3
.
[1
0
]
V
.
S
h
a
rm
a
a
n
d
R.
T
h
a
k
u
r,
"
L
S
B
m
o
d
if
ica
ti
o
n
b
a
se
d
A
u
d
io
S
t
e
g
a
n
o
g
ra
p
h
y
u
sin
g
T
ru
ste
d
T
h
ird
P
a
rty
K
e
y
In
d
e
x
in
g
m
e
th
o
d
,
"
in
T
h
ird
I
n
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
Im
a
g
e
In
f
o
rm
a
ti
o
n
P
r
o
c
e
ss
in
g
(ICIIP
),
W
a
k
n
a
g
h
a
t,
I
n
d
ia,
p
p
.
,
2
0
1
5
.
[1
1
]
R.
Am
irt
h
a
ra
jan
a
n
d
J.
B.
B.
Ra
y
y
a
p
p
a
n
,
"
S
T
e
g
a
n
o
g
ra
p
h
y
-
T
i
m
e
to
T
i
m
e
:
a
R
e
v
ie
w
,
"
Res
e
a
rc
h
J
o
u
rn
a
l
o
n
In
fo
rm
a
t
io
n
T
e
c
h
n
o
l
o
g
y
,
v
o
l.
5
,
p
p
.
5
3
-
6
6
,
2
0
1
3
.
[1
2
]
M
u
slih
a
n
d
E.
H.
Ra
c
h
m
a
wa
n
to
,
"
M
u
l
ti
m
e
d
ia
F
il
e
S
e
c
u
rit
y
W
it
h
En
d
-
of
-
F
il
e
S
teg
a
n
o
g
ra
p
h
y
M
e
th
o
d
f
o
r
M
a
in
tain
i
n
g
a
Co
n
f
id
e
n
ti
a
l
M
e
ss
a
g
e
(in
Ba
h
a
sa
In
d
o
n
e
sia
)
"
T
e
c
h
n
o
.
COM
,
v
o
l.
1
5
,
p
p
.
1
-
6
,
2
0
1
6
.
[1
3
]
M
a
rto
n
o
a
n
d
Ira
w
a
n
,
"
A
Us
e
o
f
En
d
-
of
-
F
il
e
S
teg
a
n
o
g
ra
p
h
y
o
n
Dig
it
a
l
W
a
ter
m
a
rk
in
g
(in
b
a
h
a
sa
In
d
o
n
e
sia
),
"
J
u
rn
a
l
T
ICOM
,
v
o
l.
2
,
p
p
.
3
6
-
4
2
,
2
0
1
3
.
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