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th
e
w
o
r
ld
s
till
u
s
e
S
H
A
-
1
in
s
ig
n
i
n
g
ce
r
ti
f
icate
s
[
1
8
]
.
SHA
-
1
b
ased
f
in
g
er
p
r
in
t
i
s
u
s
ed
w
id
el
y
a
n
d
s
u
p
p
o
r
ted
f
o
r
v
er
if
icatio
n
[
1
9
]
.
Oth
er
h
a
s
h
f
u
n
ct
io
n
s
al
s
o
ex
i
s
t su
c
h
as M
D5
b
y
R
o
n
ald
L
.
R
iv
est r
elea
s
ed
in
1
9
9
2
th
at
ca
n
co
m
p
r
es
s
an
y
d
a
ta
len
g
t
h
to
a
h
ash
v
al
u
e
o
f
1
2
8
b
its
[
2
0
]
,
b
u
t
r
ea
l
c
o
llis
io
n
b
r
o
k
e
MD
5
en
tire
l
y
i
n
2
0
0
4
[
2
1
]
,
[2
2]
.
SH
A
-
0
i
n
1
9
9
3
is
an
MD
4
h
ash
f
u
n
ctio
n
u
s
ed
f
o
r
au
th
e
n
t
icatio
n
,
is
b
eliev
ed
to
b
e
n
o
t
s
af
e
af
ter
s
e
v
er
al
s
u
cc
e
s
s
f
u
l
co
llis
io
n
a
ttack
s
i
n
2
0
0
4
an
d
2
0
0
5
[
1
]
.
SHA
-
2
a
n
d
SH
A
-
3
p
r
o
v
id
e
m
o
r
e
e
x
te
n
d
ed
h
as
h
v
al
u
e
t
h
at
is
m
o
r
e
co
m
p
lica
ted
to
b
r
ea
k
[
1
1
]
,
[
1
3
]
,
b
u
t
th
e
y
ar
e
m
o
r
e
co
m
p
le
x
an
d
n
o
t
as
ti
m
e
ef
f
ic
ien
t
as
SH
A
-
1
[
1
4
]
[
2
3
]
,
[
2
4
]
.
T
h
e
in
cr
ea
s
ed
n
u
m
b
er
o
f
r
o
u
n
d
s
in
S
H
A
3
m
a
k
es
it
les
s
s
u
s
ce
p
tib
le
to
co
llis
io
n
r
esi
s
tan
ce
a
nd
p
r
eim
a
g
e
r
esis
ta
n
ce
attac
k
s
wh
en
m
ea
s
u
r
ed
ag
ai
n
s
t
SH
A
2
,
MD
5
,
an
d
S
H
A
1
a
n
d
o
th
er
s
[
2
5
]
b
u
t
t
h
e
u
s
e
o
f
a
s
p
o
n
g
e
f
u
n
ctio
n
co
n
s
tr
u
ctio
n
ca
n
b
e
co
n
s
id
er
ed
n
eith
er
as
an
ad
v
a
n
tag
e
n
o
r
a
d
is
ad
v
an
tag
e
b
ec
au
s
e
th
is
f
u
n
ctio
n
is
a
n
e
w
co
n
s
tr
u
ctio
n
th
at
is
n
o
t
y
et
v
er
y
w
ell
a
n
al
y
ze
d
[
2
6
]
.
T
h
o
u
g
h
SH
A
-
1
is
p
o
p
u
lar
,
w
i
d
ely
u
s
ed
a
n
d
ac
ce
p
ted
as
s
ta
n
d
ar
d
b
y
NI
ST
.
So
m
e
n
o
ted
t
h
at
i
t
d
o
es
n
o
t
s
ee
m
to
o
f
f
er
s
u
f
f
ic
ien
t
a
v
alan
c
h
e
e
f
f
ec
t
w
it
h
r
eg
ar
d
s
t
o
th
e
d
is
tr
ib
u
tio
n
o
f
th
e
i
n
p
u
t
d
if
f
er
e
n
ce
s
,
w
h
ile
o
th
er
n
o
ted
s
o
m
e
u
n
e
x
p
ec
ted
w
ea
k
n
ess
e
s
i
n
t
h
e
co
n
s
tr
u
ctio
n
o
f
al
l
t
h
e
s
tep
u
p
d
atin
g
f
u
n
c
tio
n
s
[
1
]
,
[
2
7
]
.
T
h
is
p
r
o
b
lem
w
ill
lead
to
th
e
p
o
s
s
i
b
ilit
y
o
f
h
av
in
g
t
w
o
d
if
f
er
en
t
in
p
u
t
t
h
at
w
il
l
y
ield
t
h
e
s
a
m
e
o
u
tp
u
t
v
a
lu
e
i
n
t
h
e
m
id
d
le
o
f
alg
o
r
it
h
m
o
r
co
m
p
r
ess
io
n
f
u
n
ctio
n
[
2
0
]
[
2
8
]
.
T
h
er
ef
o
r
e,
it
is
n
ec
e
s
s
ar
y
to
d
esi
g
n
a
f
u
n
ctio
n
w
i
th
b
etter
d
if
f
u
s
io
n
to
s
p
r
ea
d
th
e
o
u
tp
u
t
in
ea
ch
r
o
u
n
d
an
d
p
r
ev
en
t
t
h
e
s
a
m
e
o
u
tp
u
t
i
n
t
h
e
n
ex
t
co
m
i
n
g
s
tag
e
s
[
2
0
]
,
[
2
9
]
-
[
3
0
]
.
Sev
er
al
s
t
u
d
ies
m
ad
e
s
ev
er
al
en
h
an
ce
m
e
n
ts
o
n
SH
A
-
1
to
attain
ad
d
itio
n
a
l
d
if
f
u
s
io
n
[
3
1
]
,
[
3
2
]
b
u
t
d
id
n
o
t
s
h
o
w
t
h
e
b
it
-
d
if
f
er
en
c
e
o
n
t
h
e
s
i
m
u
latio
n
o
f
r
es
u
lt
o
r
h
av
e
s
h
o
w
n
lo
w
er
b
it
d
if
f
er
e
n
ce
.
O
n
e
s
t
u
d
y
h
a
s
ad
d
ed
th
e
MD
5
h
as
h
to
SH
A
-
1
[
2
9
]
th
at
in
d
icate
s
th
at
th
e
b
it
-
d
i
f
f
er
e
n
ce
o
f
SH
A
-
1
9
2
is
lo
w
er
t
h
a
n
SH
A
-
160
.
T
h
is
ap
p
r
o
ac
h
m
i
g
h
t
s
u
f
f
er
f
r
o
m
th
e
s
a
m
e
w
ea
k
n
ess
as
t
h
at
o
f
MD
5
[
2
1
]
,
[
2
2
]
.
Oth
er
s
h
a
v
e
n
o
t
in
cl
u
d
ed
th
e
ac
tu
al
m
es
s
ag
e
i
n
t
h
e
co
m
p
ar
is
o
n
o
f
b
it
-
d
i
f
f
er
e
n
ce
.
[
2
3
]
.
T
h
er
ef
o
r
e,
th
e
r
esear
c
h
er
h
as
d
ec
id
ed
to
im
p
r
o
v
e
SH
A
-
1
al
g
o
r
ith
m
b
y
i
n
cr
ea
s
i
n
g
h
as
h
s
ize
o
u
tp
u
t
f
r
o
m
1
6
0
to
1
9
2
b
its
an
d
p
r
o
v
id
e
b
ette
r
d
if
f
u
s
io
n
.
An
o
th
er
en
h
a
n
ce
m
en
t
o
f
SH
A
-
1
m
a
k
e
s
u
s
e
o
f
3
2
0
-
b
it
h
as
h
b
y
d
o
u
b
lin
g
th
e
m
e
s
s
a
g
e
d
ig
e
s
t
s
ize
an
d
h
a
s
h
s
ize
[
1
4
]
.
T
h
is
en
h
an
ce
m
e
n
t
d
ec
r
ea
s
e
s
th
e
c
h
an
ce
s
o
f
t
h
e
co
llis
io
n
,
b
u
t
t
h
is
ap
p
r
o
ac
h
r
eq
u
ir
es
m
o
r
e
p
r
o
ce
s
s
in
g
ti
m
e
s
in
ce
it
m
ak
e
s
u
s
e
o
f
a
h
i
g
h
e
r
b
lo
ck
s
ize.
No
tice
th
at
all
e
n
h
a
n
ce
m
en
ts
m
ad
e
o
n
SH
A
1
u
s
es
th
e
ch
a
in
i
n
g
v
ar
iab
les
A
,
C
,
a
n
d
D
in
ea
c
h
r
o
u
n
d
as
is
a
n
d
is
j
u
s
t
s
h
if
ted
to
th
e
n
e
x
t
c
h
ain
i
n
g
v
ar
iab
le
s
an
d
s
en
d
s
i
t
to
th
e
n
ex
t
r
o
u
n
d
.
Fro
m
h
er
e,
th
e
r
es
ea
r
ch
er
p
r
o
p
o
s
ed
to
d
ev
is
e
th
e
m
i
x
in
g
m
et
h
o
d
to
d
if
f
u
s
e
v
ar
iab
les
A
,
C
,
an
d
D
b
etter
f
o
r
ea
ch
iter
at
io
n
.
T
h
is
s
tu
d
y
i
n
te
n
d
ed
to
m
o
d
if
y
SH
A
-
1
a
l
g
o
r
ith
m
b
y
i
n
cr
ea
s
i
n
g
t
h
e
o
u
tp
u
t
to
1
9
2
-
b
its
an
d
s
tr
en
g
th
e
n
i
n
g
t
h
e
h
as
h
f
u
n
ct
io
n
b
y
ad
j
u
s
ti
n
g
th
e
co
m
p
r
ess
io
n
f
u
n
ctio
n
t
h
r
o
u
g
h
th
e
i
n
co
r
p
o
r
atio
n
o
f
ad
d
itio
n
al
m
i
x
in
g
m
et
h
o
d
in
e
v
er
y
r
o
u
n
d
w
ith
th
e
in
te
n
tio
n
o
f
attai
n
in
g
b
etter
d
if
f
u
s
io
n
.
T
h
e
o
b
j
ec
tiv
es
o
f
t
h
i
s
s
t
u
d
y
ar
e
to
ev
alu
a
te
t
h
e
p
er
f
o
r
m
a
n
ce
o
f
t
h
e
m
o
d
i
f
ied
SH
A
-
1
t
h
r
o
u
g
h
av
ala
n
ch
e
e
f
f
ec
t
a
n
d
to
test
t
h
e
m
o
d
i
f
ied
SH
A
-
1
alg
o
r
ith
m
r
eg
ar
d
i
n
g
ti
m
e
a
n
d
m
es
s
ag
e
co
m
p
le
x
it
y
.
T
h
e
m
ai
n
i
m
p
ac
t
o
f
t
h
is
w
o
r
k
is
t
h
e
i
m
p
r
o
v
e
m
e
n
t
o
f
S
HA
-
1
b
y
i
n
tr
o
d
u
cin
g
ad
d
itio
n
al
m
i
x
i
n
g
m
et
h
o
d
in
ev
er
y
r
o
u
n
d
to
ac
h
iev
e
b
etter
d
i
f
f
u
s
io
n
c
h
a
r
ac
ter
is
tics
.
T
h
e
s
tu
d
y
w
i
ll
co
n
tr
ib
u
te
to
t
h
e
i
m
p
r
o
v
e
m
en
t
o
f
t
h
e
co
m
p
r
es
s
io
n
f
u
n
ctio
n
u
s
ed
b
y
SH
A
1
b
y
i
n
cr
ea
s
i
n
g
th
e
o
u
tp
u
t
o
f
t
h
e
h
as
h
v
alu
e
to
1
9
2
-
b
its
to
s
tr
en
g
th
e
n
t
h
e
alg
o
r
it
h
m
.
Hi
g
h
er
ti
m
e
w
ill b
e
n
ee
d
ed
to
b
r
ea
k
th
e
h
as
h
.
2
.
RE
SE
ARCH
M
E
T
H
O
D
2
.
1
.
Resea
rc
h P
ro
ce
du
re
Fig
u
r
e
1
s
h
o
w
s
th
e
p
r
o
p
o
s
ed
m
o
d
i
f
ied
SH
A
-
1
co
n
s
tr
u
ctio
n
w
it
h
th
e
co
u
n
ter
.
An
ad
d
ed
co
u
n
ter
w
as
XORed
to
th
e
i
n
ter
m
ed
iate
h
as
h
v
al
u
e.
T
h
e
ad
d
itio
n
o
f
th
is
p
r
o
ce
s
s
s
tr
en
g
t
h
en
ed
t
h
e
M
-
D
co
n
s
tr
u
ctio
n
b
ec
au
s
e
o
f
a
n
u
m
b
er
a
s
s
i
g
n
e
d
to
th
e
co
u
n
ter
t
h
at
ch
a
n
g
es
in
e
v
er
y
s
t
ep
.
T
h
e
co
u
n
ter
will
s
tar
t
at
a
n
i
n
it
ial
v
alu
e
o
f
ze
r
o
an
d
is
in
cr
e
m
en
t
ed
b
y
1
f
o
r
ev
er
y
m
es
s
ag
e
b
lo
ck
u
n
til t
h
e
las
t b
lo
ck
.
T
h
e
p
r
o
p
o
s
ed
SHA
al
g
o
r
ith
m
o
f
th
e
co
m
p
r
ess
io
n
f
u
n
ctio
n
r
etain
ed
t
h
e
eig
h
t
y
r
o
u
n
d
s
.
T
h
e
m
o
d
if
ied
SH
A
-
1
in
cr
ea
s
ed
th
e
m
es
s
ag
e
d
ig
es
t
f
r
o
m
1
6
0
-
b
it
s
to
1
9
2
-
b
its
to
s
tr
en
g
t
h
en
t
h
e
al
g
o
r
ith
m
.
T
o
ac
h
ie
v
e
t
h
is
,
o
n
e
ad
d
itio
n
al
ch
ai
n
i
n
g
v
ar
iab
les
F
w
a
s
ad
d
ed
.
Nex
t,
F
w
as
XORed
to
th
e
o
u
tp
u
t
o
f
E
b
ef
o
r
e
g
o
in
g
to
A
.
A
l
l
r
esear
ch
er
s
h
av
e
u
s
ed
v
ar
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n
d
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a
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h
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les
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e
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x
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g
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u
n
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to
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h
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d
if
f
u
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n
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h
e
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ar
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ar
e
m
i
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ed
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r
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n
d
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e
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n
d
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h
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i
n
g
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u
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g
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ar
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tee
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th
at
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i
n
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t
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alu
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m
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o
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ad
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iti
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Fig
u
r
e
2
s
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m
o
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f
icatio
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n
SH
A
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1
w
ith
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I
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2
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3
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it h
as
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alu
e
:
H
0
H
1
H
2
H
3
H
4
H
5
T
h
e
p
u
r
p
o
s
e
o
f
th
e
Mi
x
i
n
g
(
A,
C
,
D)
f
u
n
ctio
n
i
s
to
ac
ce
p
t
t
h
e
w
o
r
k
i
n
g
v
ar
iab
les
A
,
C
,
a
n
d
D
as
th
e
in
p
u
t
co
l
u
m
n
t
h
en
s
p
r
ea
d
th
e
b
its
o
u
t
to
d
if
f
er
e
n
t
p
lace
s
i
n
th
e
o
u
tp
u
t
co
lu
m
n
A'
,
C
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a
n
d
D'
.
T
h
e
m
i
x
is
ar
r
an
g
ed
f
r
o
m
r
i
g
h
t to
lef
t i
n
r
o
w
-
w
is
e
f
as
h
io
n
as ill
u
s
tr
ate
d
in
Fi
g
u
r
e
3
.
Fig
u
r
e
3
.
M
ix
i
n
g
f
u
n
ctio
n
2
.
2
E
v
a
lua
t
io
n
M
e
t
rics
T
h
e
p
er
f
o
r
m
a
n
ce
o
f
t
h
e
m
o
d
i
f
ied
SH
A
-
1
w
as
ev
a
lu
ated
th
r
o
u
g
h
a
v
ala
n
c
h
e
e
f
f
ec
t,
ti
m
e
a
n
d
m
es
s
ag
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co
m
p
le
x
it
y
.
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v
ala
n
ch
e
e
f
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ec
t
is
a
s
u
itab
le
ch
ar
ac
ter
is
tic
in
a
h
a
s
h
f
u
n
ct
io
n
w
h
ic
h
in
d
icate
s
th
at
a
ch
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n
g
e
i
n
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in
p
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t
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it
o
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th
e
h
a
s
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r
es
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to
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d
if
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er
e
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ce
o
n
t
h
e
p
r
o
b
ab
ilit
y
o
f
t
h
e
o
u
tp
u
t
b
it.
I
f
t
h
e
c
h
an
ce
is
clo
s
e
to
5
0
%,
th
e
h
as
h
f
u
n
ctio
n
is
co
n
s
id
er
ed
g
o
o
d
.
A
5
0
%
av
ala
n
c
h
e
p
er
ce
n
tag
e
s
h
o
w
s
t
h
at
t
h
e
d
if
f
er
e
n
ce
o
f
t
h
e
o
u
tp
u
t
h
as
h
v
a
lu
e
a
n
d
th
e
in
p
u
t
ch
an
g
e
i
s
at
lea
s
t
h
a
lf
a
n
d
a
p
r
o
b
a
b
ilit
y
h
ig
h
er
th
a
n
5
0
%
d
is
p
la
y
s
i
m
p
r
o
v
ed
s
tatis
t
ical
p
er
f
o
r
m
a
n
ce
[
3
3
]
.
T
im
e
n
o
te
s
t
h
e
s
p
ee
d
to
g
e
n
er
ate
th
e
h
a
s
h
i
n
s
ec
o
n
d
s
.
C
l
ass
i
f
icatio
n
o
f
t
h
e
m
es
s
ag
e
t
y
p
e
is
t
w
o
m
es
s
ag
e
w
it
h
1
-
b
it
ch
a
n
g
e,
2
4
m
e
s
s
a
g
es
w
i
th
a
d
if
f
er
en
ce
i
n
a
f
e
w
b
its
,
t
w
o
m
e
s
s
a
g
es
w
it
h
d
is
ti
n
ctio
n
i
n
th
e
last
f
e
w
b
its
,
le
n
g
t
h
d
i
f
f
er
e
n
c
e,
an
d
r
an
d
o
m
s
tr
i
n
g
s
.
P
er
f
o
r
m
an
ce
o
f
t
h
e
h
a
s
h
f
u
n
ct
io
n
i
s
also
m
ea
s
u
r
ed
b
y
co
m
p
ar
i
n
g
h
a
s
h
v
alu
e
s
w
i
th
ea
ch
o
t
h
er
an
d
th
e
n
co
u
n
t
in
g
ch
ar
ac
ter
s
lo
ca
ted
at
t
h
e
s
a
m
e
lo
ca
tio
n
w
i
th
th
e
s
a
m
e
co
n
ten
t
[
3
4
]
,
in
th
i
s
s
t
u
d
y
r
ef
er
r
ed
to
as c
h
ar
ac
ter
h
it.
3
.
RE
SUL
T
S
A
ND
ANA
L
YSI
S
Fo
r
p
er
f
o
r
m
a
n
ce
a
n
al
y
s
is
,
w
e
co
n
s
id
er
d
if
f
er
en
t
m
e
s
s
a
g
es d
u
r
in
g
t
h
e
tes
tin
g
a
n
d
ti
m
e,
an
d
av
ala
n
ch
e
ef
f
ec
t
w
a
s
n
o
ted
f
o
r
ea
ch
test
.
T
h
e
f
ir
s
t
m
es
s
ag
e
t
y
p
e
is
a
1
-
b
it
ch
an
g
e
in
t
h
e
m
es
s
ag
e
i
n
p
u
t
.
C
o
n
s
id
er
th
e
t
w
o
m
es
s
ag
e:
Me
s
s
ag
e
1
:
“
T
h
e
q
u
ick
b
r
o
w
n
f
o
x
j
u
m
p
s
o
v
er
th
e
laz
y
d
o
g
”
an
d
Me
s
s
a
g
e
2
:
“
T
h
e
q
u
ick
b
r
o
w
n
f
o
x
j
u
m
p
s
o
v
er
th
e
laz
y
m
o
g
”
.
T
h
e
s
ec
o
n
d
m
es
s
ag
e
t
y
p
e
w
a
s
test
ed
u
s
in
g
a
n
i
n
p
u
t
w
it
h
a
d
if
f
er
en
ce
i
n
o
n
l
y
a
f
e
w
b
it
s
.
T
ab
le
1
lis
ts
th
e
t
w
e
n
t
y
-
f
o
u
r
m
es
s
ag
e
s
u
s
e
d
.
T
h
e
r
esear
ch
er
in
s
er
ts
d
i
f
f
er
en
t c
h
ar
ac
ter
s
at
t
h
e
b
eg
i
n
n
in
g
,
m
id
d
le,
an
d
last
.
Fo
r
th
e
th
ir
d
m
e
s
s
a
g
e,
co
n
s
id
er
th
e
t
w
o
wo
r
d
s
:
“
ab
c1
2
3
_
o
w
ls
tead
_
1
2
5
5
”
an
d
“
ab
c1
2
3
_
o
w
l
s
tead
_
5
9
1
3
1
”
.
T
h
e
f
o
u
r
th
m
es
s
ag
e
i
n
p
u
t
i
s
th
e
len
g
t
h
d
if
f
er
e
n
ce
s
,
th
a
t
is
th
e
m
e
s
s
a
g
e
“
a
a
a
”
h
as
a
l
en
g
t
h
o
f
5
v
er
s
u
s
m
e
s
s
a
g
e
”
a
a
”
w
h
ic
h
h
a
s
a
len
g
t
h
o
f
3
.
T
h
e
le
n
g
th
o
f
m
es
s
ag
e
co
n
s
id
er
ed
w
a
s
li
s
ted
i
n
T
ab
le
2
A
C
D
A
0
,0
C
0
,1
D
0
,2
A
1,0
C
1,1
D
1,2
A
2
,0
C
2
,1
D
2
,2
A
3,0
C
3,1
D
3,2
A’
C’
D’
A
2,0
A
1,0
A
0,0
C
1
,1
C
0
,1
A
3
,0
D
0
,2
C
3
,1
C
2
,1
D
3
,2
D
2
,2
D
1
,2
M
i
x
i
n
g
(A,
C,
D)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esia
n
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4752
Mo
d
ified
S
HA
-
1
A
l
g
o
r
ith
m
(
R
o
g
el
L.
Qu
ila
la
)
1031
T
ab
le
1
.
Me
s
s
ag
e
in
p
u
ts
w
it
h
a
d
if
f
er
e
n
ce
o
f
a
f
e
w
b
it
s
N
o
.
M
e
ssag
e
I
nput
1
@
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
2
C
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
3
EA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
4
I
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
5
QAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
A
6
a
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
7
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
8
ÁAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
A
9
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
A
10
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
A
@
AAAAAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AA
11
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
A
C
AAAAAAAAA
AAAAAAAAAA
AAAAAA
AAAAA
A
12
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
A
E
AAAAAAA
AA
AAAAAAAAAA
AAAAAA
AAAAA
A
13
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
A
I
AAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
A
14
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AQ
AAAAAAAAA
AAAAAAAAAA
AAAAAA
AAAAA
A
15
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
A
a
AAAAAAAA
A
AAAAAAAAAA
AAAAAA
AAAAA
A
16
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
17
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
@
18
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
C
19
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
E
20
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
I
21
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
Q
22
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
a
23
AAAAAAAAAA
AAAAAA
AAAAA
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AAAAAA
AAAAA
24
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
AAAAAAAAAA
AAAAAA
AAAAA
Á
T
ab
le
2.
Me
s
s
ag
e
in
p
u
ts
w
it
h
d
if
f
er
e
n
t le
n
g
t
h
N
o
.
M
e
ssag
e
I
nput
1
a
2
a a
3
a
a
a
.
.
.
.
.
.
.
23
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
24
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
T
h
e
f
o
u
r
th
t
y
p
e
i
s
a
r
a
n
d
o
m
s
t
r
in
g
o
f
m
es
s
ag
e.
Fo
r
th
i
s
te
s
t,
th
e
m
es
s
ag
e
co
n
s
i
s
ts
o
f
c
h
ar
a
cter
s
a.
.
.
z
,
A
.
.
.
Z
,
an
d
0
.
.
.
9
.
A
n
o
n
li
n
e
to
o
l h
elp
s
g
e
n
er
ate
h
a
s
h
es
f
r
o
m
5
0
0
r
an
d
o
m
s
tr
i
n
g
s
ea
ch
o
f
len
g
th
6
4
[
3
5
]
.
T
ab
le
3
.
Su
m
m
ar
y
o
f
r
es
u
lt
s
M
e
ssag
e
Ty
p
e
A
v
a
l
a
n
c
h
e
(
%)
T
i
me
(
se
c
o
n
d
s)
M
S
H
A
-
1
S
H
A
-
1
M
S
H
A
-
1
S
H
A
-
1
1
Tw
o
me
ssag
e
s
w
i
t
h
1
-
b
i
t
c
h
a
n
g
e
5
6
.
7
7
4
6
.
2
5
0
.
0
2
0
.
0
2
2
2
4
me
ssag
e
s w
/
d
i
f
f
.
i
n
a
f
e
w
b
i
t
s
5
0
.
0
9
4
8
.
3
7
0
.
0
9
0
.
0
5
3
Tw
o
me
ssag
e
s
w
/
d
i
f
f
.
i
n
l
a
st
f
e
w
b
i
t
s
5
0
.
0
0
3
8
.
7
5
0
.
0
2
0
.
0
2
4
L
e
n
g
t
h
d
i
f
f
e
r
e
n
c
e
5
1
.
1
3
4
9
.
7
6
0
.
0
6
0
.
0
5
5
R
a
n
d
o
m s
t
r
i
n
g
s
5
0
.
1
9
4
9
.
9
0
1
.
2
8
0
.
2
8
A
v
e
r
a
g
e
(
%)
5
1
.
6
4
4
6
.
6
1
0
.
3
3
0
.
0
8
Fo
r
m
es
s
a
g
e
t
y
p
e
1
,
th
e
p
r
o
p
o
s
ed
m
o
d
i
f
ied
SH
A
-
1
ac
h
ie
v
ed
5
6
.
7
7
%
w
h
ile
SH
A
-
1
o
b
tain
e
d
4
6
.
2
5
%.
Hash
i
n
g
ti
m
e
f
o
r
b
o
th
test
s
is
0
.
0
2
s
ec
o
n
d
s
.
Fo
r
m
e
s
s
ag
e
t
y
p
e
2
,
av
ala
n
c
h
e
e
f
f
ec
t
o
f
t
h
e
p
r
o
p
o
s
ed
m
o
d
i
f
icat
io
n
o
n
SH
A
-
1
o
b
tain
ed
5
0
.
0
9
%
.
T
h
e
o
r
ig
in
al
SHA
-
1
attai
n
ed
4
8
.
3
7
%,
s
lig
h
tl
y
lo
w
er
th
a
n
th
e
d
esire
d
5
0
%.
C
o
n
ce
r
n
i
n
g
th
e
ex
ec
u
tio
n
t
i
m
e,
a
s
r
e
f
lecte
d
in
T
ab
le
3
,
it
to
o
k
th
e
m
o
d
if
ied
SH
A
-
1
0
.
0
9
s
ec
o
n
d
s
to
co
m
p
lete
w
h
ile
SH
A
-
1
to
o
k
0
.
0
5
s
ec
o
n
d
s
.
T
h
e
m
o
d
if
ied
SH
A
-
1
is
a
b
i
t
h
i
g
h
er
.
Fo
r
m
es
s
ag
e
t
y
p
e
3
,
th
e
m
o
d
i
f
ied
SH
A
-
1
ac
h
ie
v
ed
ex
ac
tl
y
5
0
.
0
0
%
w
h
i
le
S
HA
-
1
g
o
t
3
8
.
7
5
%,
w
h
ich
is
s
ig
n
i
f
ica
n
tl
y
lo
w
er
.
Hash
i
n
g
ti
m
e
f
o
r
b
o
th
test
s
is
0
.
0
2
s
ec
o
n
d
s
.
Fo
r
m
es
s
a
g
e
t
y
p
e
4
,
th
e
m
o
d
i
f
ied
S
H
A
-
1
ac
h
iev
ed
5
1
.
1
3
%
w
h
ile
SH
A
-
1
attai
n
ed
4
9
.
7
6
%.
T
h
e
h
ash
i
n
g
ti
m
e
s
h
o
w
s
0
.
0
6
an
d
0
.
0
5
f
o
r
m
o
d
if
ied
SH
A
a
n
d
SHA
-
1
.
T
h
er
e
is
a
v
er
y
m
in
i
m
al
d
if
f
er
en
ce
w
h
e
n
it
co
m
e
s
to
th
e
h
a
s
h
in
g
ti
m
e.
L
a
s
tl
y
,
f
o
r
m
e
s
s
a
g
e
t
y
p
e
5
,
t
h
e
m
o
d
i
f
ied
S
H
A
ac
h
iev
ed
5
0
.
1
9
%
w
h
i
le
SH
A
-
1
ar
r
iv
ed
at
4
9
.
9
0
%5
.
T
h
e
m
o
d
if
ied
SH
A
-
1
h
a
s
h
ed
t
h
e
r
an
d
o
m
s
tr
i
n
g
o
f
m
es
s
ag
e
i
n
1
.
2
8
s
ec
o
n
d
s
w
h
il
e
SH
A
-
1
p
r
o
d
u
ce
d
th
e
h
as
h
i
n
0
.
2
8
.
A
d
if
f
er
en
ce
o
f
1
.
0
0
s
ec
o
n
d
s
ca
n
b
e
n
o
ted
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4752
I
n
d
o
n
esia
n
J
E
lec
E
n
g
&
C
o
m
p
Sci,
Vo
l.
11
,
No
.
3
,
Sep
tem
b
er
2
0
1
8
:
1
0
2
7
–
1
0
3
4
1032
B
ased
o
n
th
e
a
v
er
ag
e
,
t
h
e
a
v
a
lan
ch
e
ef
f
ec
t
o
f
all
h
as
in
cr
ea
s
ed
d
u
e
to
th
e
m
o
d
i
f
icatio
n
s
m
ad
e.
T
h
e
test
i
n
g
s
h
o
w
ed
b
etter
d
i
f
f
u
s
io
n
r
es
u
lt
b
ec
au
s
e
o
u
t
o
f
t
h
e
f
i
v
e
d
if
f
er
en
t
m
es
s
ag
e
t
y
p
e
s
,
t
h
e
av
er
a
g
e
a
v
alan
c
h
e
p
er
ce
n
tag
e
o
f
m
o
d
if
ied
SH
A
-
1
w
a
s
5
1
.
6
4
%
w
h
ich
is
h
ig
h
e
r
th
a
n
t
h
e
tar
g
et
5
0
%
w
h
ile
S
HA
ac
h
iev
ed
o
n
l
y
4
6
.
6
1
%.
R
eg
ar
d
in
g
th
e
ti
m
e
i
t
tak
es
to
p
r
o
d
u
ce
th
e
h
as
h
,
t
h
e
ti
m
e
r
ec
o
r
d
ed
w
a
s
t
h
e
s
a
m
e
f
o
r
t
w
o
-
m
es
s
a
g
e
co
m
p
ar
is
o
n
s
.
An
i
n
cr
ea
s
e
in
t
i
m
e
ap
p
ea
r
s
as
th
e
n
u
m
b
er
o
f
th
e
m
e
s
s
a
g
e
to
b
e
h
as
h
ed
en
l
ar
g
es
.
T
h
e
av
er
ag
e
ti
m
e
n
o
ted
f
o
r
m
o
d
if
ied
SH
A
-
1
is
0
.
3
3
w
h
ile
SH
A
-
1
is
0
.
0
8
.
T
h
e
in
cr
e
m
en
t
is
m
o
s
tl
y
d
u
e
to
th
e
ad
d
ed
m
i
x
in
g
m
et
h
o
d
an
d
XOR
o
p
er
atio
n
.
A
l
th
o
u
g
h
t
h
e
ti
m
e
as
s
o
ciate
d
w
it
h
h
as
h
i
n
g
a
m
es
s
ag
e
u
s
in
g
m
o
d
i
f
ied
SH
A
is
a
b
it h
i
g
h
er
,
th
e
r
e
is
e
v
id
en
t
c
h
ar
ac
ter
h
it
s
a
s
s
h
o
w
n
in
T
ab
le
4
.
T
ab
le
4.
Su
m
m
ar
y
o
f
c
h
ar
ac
te
r
h
its
M
e
ssag
e
Ty
p
e
T
o
t
a
l
C
h
a
r
a
c
t
e
r
H
i
t
s
M
ax
N
o
.
Of
E
q
u
a
l
C
h
a
r
a
c
t
e
r
H
its
M
S
H
A
-
1
S
H
A
-
1
M
S
H
A
-
1
S
H
A
-
1
1
1
-
b
i
t
c
h
a
n
g
e
0
0
0
0
2
2
4
me
ssag
e
s w
/
d
i
f
f
.
i
n
a
f
e
w
b
i
t
s
0
2
0
1
3
Tw
o
me
ssag
e
s
w
/
d
i
f
f
.
i
n
l
a
st
f
e
w
b
i
t
s
0
5
0
5
4
L
e
n
g
t
h
d
i
f
f
e
r
e
n
c
e
1
6
1
2
5
R
a
n
d
o
m s
t
r
i
n
g
s
38
48
1
2
A
v
e
r
a
g
e
(
%)
(
2
:
5
)
40
(
4
:
5
)
80
I
n
th
e
m
o
d
i
f
ied
SH
A
-
1
,
m
es
s
ag
e
t
y
p
es
1
,
2
,
an
d
th
r
ee
d
o
esn
'
t
h
a
v
e
an
y
ch
ar
ac
ter
h
i
ts
.
Fo
r
m
e
s
s
a
g
e
t
y
p
e
4
,
o
u
t
o
f
t
h
e
2
4
h
a
s
h
e
s
g
en
er
ated
,
t
h
er
e
w
a
s
o
n
e
i
n
s
t
an
ce
w
h
er
e
t
h
e
s
a
m
e
c
h
ar
ac
t
er
w
a
s
at
t
h
e
s
a
m
e
p
o
s
itio
n
.
Fo
r
m
es
s
ag
e
t
y
p
e
5
,
o
u
t o
f
th
e
5
0
0
r
an
d
o
m
m
e
s
s
a
g
es,
3
8
h
ash
p
air
s
co
n
tai
n
s
o
n
e
ch
ar
ac
ter
h
it
.
C
h
ar
ac
ter
h
its
ar
e
n
o
ted
m
o
r
e
f
r
eq
u
en
t
l
y
i
n
SH
A
-
1
.
Fo
r
m
ess
a
g
e
t
y
p
e
2
,
th
er
e
w
er
e
t
w
o
h
i
ts
r
ec
o
r
d
e
d
.
T
h
er
e
w
er
e
f
i
v
e
h
it
s
o
b
s
er
v
ed
f
o
r
m
ess
a
g
e
t
y
p
e
3
an
d
th
e
n
u
m
b
er
o
f
ch
ar
ac
ter
s
p
er
h
it
r
an
g
es
f
r
o
m
1
-
5
ch
ar
ac
ter
s
p
er
h
ash
.
Fo
r
m
es
s
ag
e
t
y
p
e
4
,
6
-
ch
ar
ac
ter
h
i
ts
an
d
th
e
n
u
m
b
er
o
f
ch
ar
ac
ter
s
th
at
m
atch
r
an
g
es
f
r
o
m
1
-
2
p
er
h
as
h
.
Fo
r
m
es
s
a
g
e
5
,
th
er
e
w
er
e
4
4
h
as
h
p
air
s
co
n
tai
n
i
n
g
o
n
e
c
h
ar
ac
ter
h
it
p
er
h
as
h
a
n
d
t
w
o
h
as
h
p
air
s
w
i
th
2
ch
ar
ac
ter
h
i
ts
f
o
r
a
to
tal
o
f
48
h
its
.
No
ti
ce
th
at
th
e
h
its
f
o
r
th
e
o
r
ig
in
al
SHA
-
1
ar
e
h
ig
h
er
co
m
p
ar
ed
to
th
e
ad
j
u
s
ted
v
er
s
i
o
n
.
T
h
e
m
o
d
i
f
ied
SH
A
-
1
s
i
m
u
la
tio
n
in
d
icate
s
th
a
t
o
u
t
o
f
t
h
e
f
iv
e
m
e
s
s
a
g
e
t
y
p
es,
t
h
er
e
w
er
e
t
w
o
in
s
ta
n
ce
s
w
h
er
e
a
c
h
ar
ac
ter
h
i
t
w
a
s
n
o
ted
(
2
:5
o
r
4
0
%)
w
h
il
e
in
SH
A
-
1
,
c
h
ar
ac
ter
h
it
s
o
cc
u
r
4
o
u
t
o
f
t
h
e
f
i
v
e
d
if
f
er
e
n
t
m
e
s
s
a
g
e
t
y
p
es
(
4
:5
o
r
8
0
%).
W
h
en
co
n
s
id
er
in
g
t
h
e
n
u
m
b
er
o
f
h
its
,
th
e
m
o
d
i
f
ied
SHA
-
1
h
as
a
m
u
c
h
lo
w
er
h
i
t r
ate
co
m
p
ar
ed
to
th
e
o
r
ig
in
al
S
H
A
-
1
o
n
all
test
s
m
a
d
e
an
d
o
n
all
test
ca
s
es
.
Fig
u
r
e
4
.
Hash
li
s
t f
o
r
a
m
e
s
s
a
g
e
w
it
h
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e
d
i
f
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e
n
ce
i
n
a
f
e
w
b
its
T
o
u
n
d
er
s
tan
d
ch
ar
ac
ter
h
it
s
,
u
s
i
n
g
t
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e
2
4
m
es
s
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in
p
u
t
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eir
h
as
h
v
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lu
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i
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HA
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1
,
th
e
r
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ch
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co
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t
t
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t
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t
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w
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a
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it.
Usi
n
g
tr
ad
itio
n
al
SH
A
-
1
as
s
h
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Fi
g
u
r
e
4
,
th
e
h
ash
o
f
t
h
e
m
e
s
s
a
g
e
h
a
v
i
n
g
a
d
if
f
er
e
n
ce
in
a
f
e
w
b
it
s
f
o
u
n
d
t
w
o
h
it
s
(
Hash
8
an
d
9
,
h
ash
2
3
an
d
2
4
)
.
Fig
u
r
e
5
illu
s
tr
at
es
an
o
th
er
ex
a
m
p
le
u
s
i
n
g
t
w
o
m
es
s
ag
e
s
w
it
h
th
e
d
if
f
er
e
n
ce
in
a
f
e
w
b
it
s
.
I
n
th
e
m
o
d
if
ied
SH
A
-
1
,
th
e
co
m
p
u
ted
h
as
h
f
o
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n
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u
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w
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ed
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s
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h
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g
p
r
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g
r
am
[
3
6
]
.
T
h
is
p
r
o
g
r
am
t
ak
es
h
a
s
h
v
alu
e
s
an
d
co
u
n
t
s
h
o
w
m
a
n
y
d
u
p
licate
s
th
e
h
a
s
h
f
u
n
ct
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n
p
r
o
d
u
ce
s
.
1
0
0
0
h
ash
es
f
r
o
m
r
an
d
o
m
s
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i
n
g
s
w
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e
g
en
er
ated
u
s
in
g
th
e
m
o
d
i
f
ied
SH
A
-
1
alg
o
r
ith
m
,
a
n
d
af
ter
r
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n
n
i
n
g
t
h
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h
as
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m
o
d
i
f
ied
SH
A
-
1
f
o
u
n
d
n
o
d
u
p
licates.
Fi
g
u
r
e
6
s
h
o
w
s
th
e
s
cr
ee
n
s
h
o
t o
f
t
h
e
h
a
s
h
f
u
n
ct
io
n
tes
t.
Fig
u
r
e
6
.
Hash
f
u
n
ctio
n
test
4
.
CO
NCLUS
I
O
N
T
h
is
s
tu
d
y
i
n
te
n
d
ed
to
m
o
d
if
y
SH
A
-
1
al
g
o
r
ith
m
b
y
i
n
cr
ea
s
i
n
g
t
h
e
o
u
tp
u
t
to
1
9
2
-
b
its
an
d
s
tr
en
g
th
e
n
i
n
g
t
h
e
h
as
h
f
u
n
ct
io
n
b
y
ad
j
u
s
ti
n
g
th
e
co
m
p
r
ess
io
n
f
u
n
ctio
n
t
h
r
o
u
g
h
th
e
i
n
co
r
p
o
r
atio
n
o
f
ad
d
itio
n
al
m
i
x
in
g
m
e
th
o
d
i
n
e
v
er
y
r
o
u
n
d
w
i
th
t
h
e
i
n
te
n
tio
n
o
f
attai
n
i
n
g
b
etter
d
if
f
u
s
io
n
.
L
o
o
k
i
n
g
at
th
e
r
es
u
lts
o
f
t
h
e
test
s
d
o
n
e,
th
e
m
o
d
i
f
ied
SH
A
-
1
h
a
v
e
b
etter
d
if
f
u
s
io
n
co
m
p
ar
ed
to
th
e
o
r
ig
i
n
al
SH
A
-
1
.
T
h
e
d
if
f
u
s
io
n
i
s
ev
id
en
t
b
y
t
h
e
i
n
cr
ea
s
e
in
t
h
e
a
v
alan
c
h
e
p
er
ce
n
ta
g
e.
T
h
er
e
is
an
i
n
cr
ea
s
e
i
n
t
h
e
a
v
alan
ch
e
p
er
ce
n
ta
g
e
alth
o
u
g
h
th
e
ti
m
e
al
s
o
in
cr
e
ased
w
h
en
m
es
s
a
g
es
i
n
cr
ea
s
ed
.
T
h
e
ad
d
itio
n
al
m
ix
i
n
g
m
et
h
o
d
a
n
d
XOR
o
p
er
atio
n
co
n
tr
ib
u
te
to
th
e
i
n
cr
e
m
en
t
i
n
ti
m
e.
I
t
is
a
ls
o
ev
id
en
t
th
a
t
th
e
n
u
m
b
er
o
f
h
it
s
u
s
i
n
g
th
e
m
o
d
if
ied
SH
A
-
1
w
as
m
in
i
m
a
l
o
r
lo
w
er
co
m
p
ar
ed
to
th
e
o
r
ig
in
al
SH
A
-
1
lead
in
g
to
n
o
co
llis
io
n
.
Up
o
n
u
s
i
n
g
t
h
e
h
as
h
f
u
n
ctio
n
test
in
g
p
r
o
g
r
a
m
,
t
h
e
h
as
h
v
a
lu
e
s
f
o
u
n
d
h
av
e
n
o
d
u
p
licates.
B
ased
o
n
th
e
r
es
u
lt
s
,
th
e
m
o
d
i
f
ied
SH
A
-
1
ca
n
b
e
u
s
ed
to
te
s
t
t
h
e
in
te
g
r
it
y
o
f
m
e
s
s
a
g
es.
Fu
r
t
h
er
i
m
p
r
o
v
e
m
e
n
t
is
s
u
g
g
ested
to
m
i
n
i
m
ize
th
e
ti
m
e
co
n
s
u
m
ed
b
y
t
h
e
m
o
d
i
f
ied
SH
A
-
1
h
a
s
h
b
y
s
tu
d
y
i
n
g
t
h
e
e
f
f
e
ct
o
f
less
e
n
i
n
g
t
h
e
n
u
m
b
er
o
f
r
o
u
n
d
s
.
RE
F
E
R
E
NC
E
S
[1
]
N.
Kish
o
re
a
n
d
B.
Ka
p
o
o
r
,
“
A
tt
a
c
k
s
o
n
a
n
d
a
d
v
a
n
c
e
s
in
se
c
u
re
h
a
sh
a
lg
o
rit
h
m
s,”
IAE
NG
In
t.
J
.
C
o
mp
u
t.
S
c
i.
,
v
o
l
.
4
3
,
n
o
.
3
,
p
p
.
3
2
6
–
3
3
5
,
2
0
1
6
.
[2
]
M
.
A
.
A
lah
m
a
d
,
“
De
sig
n
o
f
a
Ne
w
Cr
y
p
t
o
g
r
a
p
h
ic Ha
sh
F
u
n
c
ti
o
n
–
T
it
a
n
iu
m
,
”
In
d
o
n
e
s.
J
.
El
e
c
tr.
En
g
.
Co
mp
u
t.
S
c
i.
,
v
o
l.
1
0
,
n
o
.
2
,
p
p
.
8
2
7
–
8
3
2
,
2
0
1
8
.
[3
]
I.
A
ls
m
a
d
i
a
n
d
M
.
Zar
o
u
r,
“
On
li
n
e
in
teg
rit
y
a
n
d
a
u
th
e
n
ti
c
a
ti
o
n
c
h
e
c
k
in
g
f
o
r
Qu
ra
n
e
lec
tro
n
ic
v
e
rsio
n
s,”
Ap
p
l.
Co
mp
u
t
.
In
fo
rm
a
t
ics
,
v
o
l.
1
3
,
n
o
.
1
,
p
p
.
3
8
–
4
6
,
2
0
1
7
.
[4
]
R.
P
.
A
ry
a
,
U.
M
ish
ra
,
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2
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8
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9
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tp
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.
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