I
nd
o
ne
s
ia
n J
o
urna
l o
f
E
lect
rica
l En
g
ineering
a
nd
Co
m
pu
t
er
Scienc
e
Vo
l.
24
,
No
.
1
,
Octo
b
er
2
0
2
1
,
p
p
.
45
2
~
46
3
I
SS
N:
2
5
0
2
-
4
7
5
2
,
DOI
: 1
0
.
1
1
5
9
1
/ijeecs.v
24
.i
1
.
pp
45
2
-
46
3
452
J
o
ur
na
l ho
m
ep
a
g
e
:
h
ttp
:
//ij
ee
cs.ia
esco
r
e.
co
m
The
s
ecuri
ty o
f
R
C4
alg
o
rithm usi
ng
keys
genera
tio
n depen
ding
o
n user's re
tina
H
ud
a
M
.
Sa
lih
,
Ra
g
hd
a
Sa
la
m
Al
M
a
hd
a
wi
De
p
a
rtme
n
t
o
f
Co
m
p
u
ter E
n
g
in
e
e
rin
g
,
Co
ll
e
g
e
o
f
En
g
in
e
e
rin
g
,
U
n
i
v
e
rsity
o
f
Diy
a
la,
Ba
q
u
b
a
h
,
Ira
q
Art
icle
I
nfo
AB
S
T
RAC
T
A
r
ticle
his
to
r
y:
R
ec
ei
v
ed
Ma
y
16
,
2
0
2
1
R
ev
is
ed
J
u
l
30
,
2
0
2
1
Acc
ep
ted
Au
g
4
,
2
0
2
1
Dig
it
a
l
tec
h
n
o
lo
g
ies
g
r
o
w
m
o
re
ra
p
id
l
y
;
in
f
o
rm
a
ti
o
n
se
c
u
rit
y
t
h
re
a
ts
a
re
b
e
c
o
m
in
g
in
c
re
a
sin
g
l
y
d
a
n
g
e
r
o
u
s.
Ad
v
a
n
c
e
d
a
n
d
v
a
rio
u
s
c
y
b
e
r
-
a
tt
a
c
k
s
a
n
d
se
c
u
rit
y
th
re
a
ts,
li
k
e
targ
e
ted
e
m
a
il
s,
a
n
d
in
f
o
rm
a
ti
o
n
e
x
p
l
o
it
a
t
io
n
,
p
o
se
a
c
rit
ica
l
th
re
a
t
t
h
a
t
b
a
sic
a
ll
y
u
n
d
e
r
m
in
e
s
o
u
r
tru
st
i
n
t
h
e
d
i
g
it
a
l
so
c
i
e
ty
.
Ri
v
e
st
c
ip
h
e
r
4
(RC
4
)
a
l
g
o
r
it
h
m
is
a
si
g
n
ifi
c
a
n
t
c
ip
h
e
r
o
f
a
stre
a
m
th
a
t
c
o
u
l
d
b
e
u
ti
li
z
e
d
wit
h
p
r
o
to
c
o
ls
o
f
t
h
e
in
te
rn
e
t,
th
e
a
d
v
a
n
tag
e
o
f
th
e
RC
4
a
lg
o
rit
h
m
is
th
a
t
it
is
sim
p
le
a
n
d
e
ffe
c
ti
v
e
.
T
h
e
re
a
re
se
v
e
ra
l
we
a
k
,
e
sp
e
c
iall
y
a
fter
t
h
e
p
se
u
d
o
-
ra
n
d
o
m
g
e
n
e
ra
ti
o
n
a
lg
o
ri
th
m
(P
RG
A),
P
RG
A
'
s
in
it
ially
2
5
6
r
o
u
n
d
s
(th
e
a
m
o
u
n
t
o
f
t
h
e
RC4
p
e
rm
u
t
a
ti
o
n
).
S
e
v
e
ra
l
m
o
d
if
ied
RC4
st
u
d
ies
h
a
v
e
b
e
e
n
p
u
b
li
sh
e
d
th
u
s
fa
r,
h
o
we
v
e
r,
th
e
y
a
ll
fa
c
e
e
it
h
e
r
sta
n
d
a
rd
p
riv
a
c
y
o
r
a
c
h
iev
e
m
e
n
t
e
v
a
lu
a
ti
o
n
issu
e
s.
Th
is
p
a
p
e
r
p
r
o
p
o
se
s
a
n
e
w
RC4
a
lg
o
rit
h
m
th
a
t
is
b
a
se
d
o
n
t
h
e
u
se
r'
s
re
ti
n
a
(RC4
-
Re
ti
n
a
),
w
h
ich
h
a
s
so
l
v
e
d
b
o
th
o
f
th
e
se
we
a
k
p
o
in
ts
it
wa
s
in
d
ic
a
ted
in
th
e
sta
n
d
a
r
d
RC
4
a
lg
o
r
it
h
m
.
T
h
e
n
o
v
e
l
ty
o
f
re
ti
n
a
k
e
y
sc
h
e
d
u
li
n
g
a
lg
o
rit
h
m
(RKSA)
,
wh
ic
h
is
g
e
n
e
ra
ted
b
y
re
ly
in
g
o
n
th
e
u
se
r'
s
re
ti
n
a
o
f
th
e
a
lg
o
rit
h
m
will
m
o
d
ify
th
e
m
a
tri
x
o
f
p
e
rm
u
tatio
n
u
se
d
t
o
c
o
n
f
ig
u
re
th
e
k
e
y
s.
T
h
e
e
fficie
n
c
y
o
f
t
h
e
imp
ro
v
e
d
a
lg
o
rit
h
m
wa
s
m
e
a
su
re
d
b
y
d
e
p
e
n
d
i
n
g
o
n
t
h
e
a
v
e
ra
g
e
se
c
u
rit
y
o
f
c
ip
h
e
rtex
t
o
f
d
iffere
n
t
k
e
y
s
a
n
d
d
iffere
n
t
m
e
ss
a
g
e
s,
re
su
lt
s
we
re
g
o
o
d
c
o
m
p
a
re
d
to
t
h
e
sta
n
d
a
rd
a
l
g
o
rit
h
m
.
K
ey
w
o
r
d
s
:
Av
er
ag
e
s
ec
u
r
ity
RC4
R
etin
a
im
ag
e
R
KSA
T
h
is i
s
a
n
o
p
e
n
a
c
c
e
ss
a
rticle
u
n
d
e
r th
e
CC B
Y
-
SA
li
c
e
n
se
.
C
o
r
r
e
s
p
o
nd
ing
A
uth
o
r
:
Hu
d
a
M.
Salih
Dep
ar
tm
en
t o
f
C
o
m
p
u
ter
E
n
g
i
n
ee
r
in
g
Un
iv
er
s
ity
o
f
Diy
ala
Diy
ala,
B
aq
u
b
ah
,
3
2
0
0
1
I
r
aq
E
m
ail:
alan
s
ar
i.c
o
m
p
@
u
o
d
iy
a
la.
ed
u
.
iq
,
h
u
d
.
m
.
s
alih
2
0
2
0
@
g
m
ail.
co
m
1.
I
NT
RO
D
UCT
I
O
N
R
iv
est
c
ip
h
er
4
(
RC4
)
is
a
s
ig
n
if
ican
t
cip
h
er
o
f
t
h
e
s
tr
ea
m
th
at
co
u
ld
b
e
f
o
u
n
d
in
a
wid
e
r
an
g
e
o
f
p
r
o
to
co
ls
o
f
t
h
e
in
ter
n
et,
i
n
clu
d
in
g
Sk
y
p
e
,
s
ec
u
r
e
s
o
ck
et
la
y
er
,
tr
a
n
s
p
o
r
t
lay
er
s
ec
u
r
ity
(
SS
L
/TL
S),
wir
eless
p
r
o
tecte
d
ac
ce
s
s
(
W
PA)
,
an
d
wir
ed
eq
u
iv
alen
t
p
r
iv
ac
y
(
W
E
P)
[
1
]
,
[
2
]
.
T
h
e
s
p
ee
d
a
n
d
clar
ity
o
f
t
h
e
R
C
4
alg
o
r
ith
m
'
s
s
ig
n
if
ican
t
o
p
e
r
ato
r
s
h
av
e
b
ee
n
o
v
er
s
u
ch
a
s
u
b
s
tan
tial
f
ield
o
f
a
p
p
lica
tio
n
s
;
th
e
ef
f
icien
t
im
p
lem
en
tatio
n
o
f
b
o
th
h
ar
d
war
e
an
d
s
o
f
twar
e
h
as
b
ee
n
ex
tr
em
ely
ea
s
y
to
d
ev
elo
p
[
3
]
.
I
n
co
m
p
ar
is
o
n
to
m
an
y
o
th
er
en
cr
y
p
tio
n
alg
o
r
i
th
m
s
,
R
C
4
is
f
ast
an
d
s
m
all.
T
h
e
R
C
4
alg
o
r
ith
m
en
cr
y
p
ti
o
n
p
r
o
ce
d
u
r
e
was
d
iv
id
ed
in
to
two
p
ar
ts
:
(
1
)
an
ass
es
s
m
en
t
o
f
th
e
R
C
4
'
s
in
itia
lizatio
n
,
with
an
em
p
h
asis
o
n
th
e
k
ey
s
ch
ed
u
lin
g
alg
o
r
ith
m
'
s
(
KSA)
in
itializatio
n
,
an
d
(
2
)
an
e
v
alu
atio
n
o
f
th
e
k
ey
s
tr
ea
m
g
e
n
er
atin
g
o
u
tp
u
t
,
with
an
em
p
h
asis
o
n
th
e
p
s
eu
d
o
-
r
an
d
o
m
g
en
er
a
tio
n
alg
o
r
ith
m
(
PR
GA
)
r
o
u
n
d
-
r
u
n
n
i
n
g
p
r
o
ce
s
s
an
d
in
ter
n
al
s
tatu
s
[
4
]
.
R
an
d
o
m
n
u
m
b
er
s
p
lay
an
im
p
o
r
tan
t
r
o
le
in
cr
y
p
to
g
r
ap
h
ic
p
r
o
ce
s
s
es.
B
lo
ck
p
ad
d
in
g
in
itializatio
n
v
ec
to
r
s
,
n
o
n
ce
s
,
o
b
s
tacle
s
,
an
d
th
e
k
ey
s
ar
e
a
f
ew
o
f
th
e
cr
y
p
to
g
r
ap
h
ic
item
s
th
at
in
v
o
lv
e
a
s
er
ies
o
f
u
n
p
r
e
d
ictab
le
p
iece
s
.
T
h
e
r
elate
d
r
an
d
o
m
n
u
m
b
er
g
en
er
ato
r
(
R
NG)
also
a
cr
y
p
to
g
r
ap
h
ic
s
y
s
tem
th
at
g
iv
es
b
its
f
o
r
an
y
o
f
t
h
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4
7
5
2
Th
e
s
ec
u
r
ity
o
f R
C
4
a
lg
o
r
ith
m
u
s
in
g
ke
ys g
en
era
tio
n
d
ep
e
n
d
in
g
o
n
u
s
er's retin
a
(
Hu
d
a
M.
S
a
lih
)
453
af
o
r
em
en
tio
n
ed
.
T
h
e
s
ig
n
if
ica
n
t
am
o
u
n
t
o
f
R
NG
b
its
ar
e
d
eliv
er
ed
clea
r
ly
an
d
s
o
a
p
ass
iv
e
in
tr
u
d
er
h
as
an
ea
s
y
ab
ilit
y
to
r
ea
d
th
e
R
NG
p
er
f
o
r
m
an
ce
an
d
m
ay
i
n
f
lu
e
n
ce
an
y
s
h
o
r
tco
m
in
g
s
co
n
tain
ed
th
er
e
[
5
]
,
[
6
]
.
R
NGs m
ay
b
e
class
if
ied
in
to
t
wo
m
ay
ca
teg
o
r
ies [
7
]
:
−
T
r
u
e
r
an
d
o
m
n
u
m
b
er
g
e
n
er
ato
r
s
(
T
R
NGs)
−
Ps
eu
d
o
-
r
an
d
o
m
n
u
m
b
er
g
en
e
r
ato
r
s
(
PR
NGs)
R
NGs
co
u
ld
b
e
u
s
ed
f
o
r
cr
y
p
to
g
r
ap
h
ic
o
p
er
ati
o
n
al
ac
tiv
ities
,
an
d
a
d
is
cr
im
in
atin
g
p
o
r
tio
n
o
f
th
e
cr
y
p
to
g
r
ap
h
ic
s
y
s
tem
ca
n
b
e
co
n
s
id
er
ed
o
n
th
is
ac
co
u
n
t
[
8
]
.
T
h
e
T
R
NG
p
r
o
d
u
ce
s
r
an
d
o
m
n
u
m
b
e
r
s
u
s
in
g
ac
tu
al
p
h
y
s
ical
s
o
u
r
ce
s
th
at
ar
e
u
n
co
n
tr
o
llab
le
an
d
p
r
e
d
ictab
le.
T
h
ey
ar
e
u
s
ed
to
g
e
n
er
ate
s
ec
u
r
ity
s
y
s
tem
k
ey
s
.
All
b
io
m
etr
ics
ca
n
b
e
u
s
ed
as
th
e
n
o
n
-
d
ete
r
m
in
is
tic
s
o
u
r
ce
o
f
T
R
NG
[
9
]
to
p
r
o
d
u
ce
a
u
n
iq
u
e
k
ey
d
ir
ec
tly
f
r
o
m
th
e
u
s
er
'
s
b
io
m
etr
ic
in
f
o
r
m
atio
n
,
n
am
el
y
th
e
b
io
m
etr
ic
r
etin
a
[
1
0
]
.
Fo
r
s
ev
er
al
d
is
tin
ct
cr
y
p
to
g
r
ap
h
ic
s
tr
u
ct
u
r
es,
ch
ao
tic
f
u
n
ctio
n
s
ar
e
a
v
er
y
u
s
ef
u
l b
u
ild
in
g
b
lo
ck
.
T
h
eir
d
eter
m
i
n
is
tic
an
d
ap
er
io
d
ic
p
r
o
p
er
ties
allo
w
th
e
cr
y
p
to
s
y
s
tem
s
to
b
e
an
aly
ze
d
clea
r
ly
an
d
eleg
an
tly
.
T
h
e
s
ec
u
r
ity
o
f
th
ese
s
ch
em
es
d
ep
en
d
s
o
n
in
itial
co
n
d
itio
n
s
an
d
th
e
p
ar
am
eter
s
o
f
th
e
c
h
a
o
tic
s
y
s
tem
s
b
u
t
n
o
t
r
elate
d
to
th
e
s
tiff
n
ess
o
r
th
e
co
m
p
u
tatio
n
al
b
o
u
n
d
s
[
1
1
]
,
[
1
2
]
.
2.
RE
L
AT
E
D
WO
RK
T
h
er
e
is
a
lo
t
o
f
r
esear
ch
th
at
ad
d
r
ess
ed
th
e
wea
k
n
ess
es
in
th
e
R
C
4
alg
o
r
ith
m
b
u
t
it
is
n
o
t
with
o
u
t
g
ap
s
an
d
b
elo
w
is
a
r
ev
iew
o
f
th
e
m
o
s
t im
p
o
r
ta
n
t:
Als
h
ar
id
a
et
a
l.
[
1
]
T
h
eir
p
a
p
er
d
is
cu
s
s
es
th
e
R
C
4
alg
o
r
i
th
m
,
R
C
4
D
h
as
b
ee
n
im
p
r
o
v
ed
in
t
h
is
r
esear
ch
b
y
am
en
d
in
g
th
e
f
ir
s
t
an
d
s
ec
o
n
d
s
ec
tio
n
s
o
f
th
e
alg
o
r
ith
m
.
I
n
th
e
f
ir
s
t
s
ec
tio
n
,
it
r
aises
th
e
u
s
ag
e
o
f
k
ey
o
p
e
r
atio
n
s
to
o
b
tain
m
o
r
e
s
ig
n
if
ican
t r
an
d
o
m
,
wh
ile
in
t
h
e
s
ec
o
n
d
s
ec
tio
n
ad
d
s
o
n
e
m
o
r
e
r
an
d
o
m
v
a
r
iab
le
an
d
u
s
es
th
e
Xo
r
f
u
n
ctio
n
.
T
h
u
s
,
th
e
NI
ST
s
tatis
tical
test
s
an
d
th
e
s
tatis
tical
an
aly
s
is
o
f
d
is
tan
t
-
eq
u
alities
r
ev
ea
l
th
at
t
h
e
R
C
4
D
is
m
o
r
e
r
o
b
u
s
t
t
h
an
t
h
e
o
r
ig
in
al
R
C
4
.
Sah
ib
et
a
l.
[
1
3
]
T
h
ey
o
v
er
co
m
e
th
e
R
C
4
alg
o
r
ith
m
'
s
v
u
ln
er
ab
ilit
y
p
o
in
t
s
,
th
er
e
ar
e
a
v
ar
iety
o
f
m
is
ta
k
es
in
R
C
4
's
KS
A.
B
ased
o
n
m
u
lti
-
ch
ao
tic
m
ap
s
th
e
r
esear
ch
im
p
lem
e
n
ted
i
m
p
r
o
v
e
d
R
C
4
k
e
y
g
en
er
atio
n
.
KSA'
s
n
ew
p
atter
n
co
in
e
d
as
en
h
an
ce
d
KSA
(
I
KSA)
,
th
e
S
ar
r
a
y
'
s
p
er
m
u
tatio
n
m
o
d
if
ie
d
to
d
e
p
en
d
o
n
th
e
r
a
n
d
o
m
n
u
m
b
er
g
en
er
ato
r
b
ased
o
n
th
r
ee
d
is
o
r
g
an
ized
m
ap
s
,
an
d
th
e
s
u
g
g
ested
alg
o
r
ith
m
o
u
t
p
u
ts
a
r
e
as
f
o
ll
o
ws:
Ou
tp
u
t
=
M
X
OR
g
en
er
ated
k
ey
XOR
r
an
d
o
m
v
alu
e
f
r
o
m
I
KS
A
(
R
3
w)
T
h
e
en
h
an
ce
d
R
C
4
with
I
KSA
is
p
r
o
v
en
to
b
e
co
n
ce
aled
,
r
an
d
o
m
n
ess
an
d
co
n
s
is
ten
cy
o
v
e
r
th
e
v
ar
y
in
g
len
g
t
h
o
f
th
e
k
ey
an
d
v
ar
io
u
s
p
lain
tex
t
s
izes
u
n
lik
e
th
o
s
e
o
f
th
e
o
r
ig
in
al
R
C
4
.
Ham
ee
d
an
d
Ma
h
m
o
o
d
[
1
4
]
,
I
n
a
q
u
est
to
in
cr
ea
s
e
th
e
R
C
4
's
s
ec
u
r
ity
an
d
g
et
r
id
o
f
th
e
v
u
ln
e
r
ab
ilit
y
ass
o
ciate
d
with
th
e
S
ar
r
a
y
'
s
f
ir
s
t
p
er
m
u
tatio
n
a
n
d
th
e
S
ar
r
a
y
'
s
p
er
m
u
tatio
n
p
r
o
ce
s
s
es,
a
n
ew
v
er
s
io
n
o
f
KSA
is
p
r
o
p
o
s
ed
.
Flu
h
r
er
et
a
l.
[
1
5
]
,
T
h
e
KSA
wh
ich
d
er
iv
es
th
e
in
itial
s
tate
f
r
o
m
th
e
v
ar
i
ab
le
s
ize
k
ey
was
an
aly
ze
d
an
d
two
im
p
o
r
tan
t sh
o
r
t
co
m
in
g
s
o
f
th
is
p
r
o
ce
s
s
wer
e
id
en
tifie
d
.
3.
M
O
T
I
VAT
I
O
N
T
h
e
s
tan
d
ar
d
R
C
4
alg
o
r
ith
m
h
as
v
u
ln
er
ab
ilit
ies
in
th
e
way
th
e
k
ey
s
ar
e
cr
ea
te
d
an
d
u
tili
ze
d
,
wh
ich
led
to
th
e
e
x
p
lo
itatio
n
o
f
th
es
e
wea
k
n
ess
es
an
d
th
en
attac
k
th
e
R
C
4
alg
o
r
ith
m
,
wh
ich
ca
u
s
ed
th
e
r
esear
ch
er
s
to
p
r
o
v
id
e
v
ar
io
u
s
r
esear
ch
a
n
d
s
tu
d
ies
to
ad
d
r
ess
th
e
v
u
l
n
er
ab
ilit
ies,
b
u
t
th
ese
r
esear
c
h
es
wer
e
n
o
t
ab
le
to
f
u
lly
im
p
r
o
v
e
th
e
s
tan
d
ar
d
R
C
4
alg
o
r
ith
m
.
T
h
e
p
r
o
p
o
s
ed
s
y
s
tem
in
th
is
r
esear
ch
,
wh
ich
r
elies
o
n
g
en
er
atin
g
k
ey
s
u
s
in
g
th
e
u
s
er
'
s
r
etin
a,
h
as
ad
d
r
ess
ed
wea
k
n
ess
es
in
t
h
e
g
en
er
ate
d
k
ey
,
as
th
e
k
ey
s
g
en
er
ated
f
r
o
m
th
e
u
s
er
'
s
r
etin
a
ar
e
ch
ar
ac
ter
ized
b
y
r
an
d
o
m
n
ess
an
d
h
ig
h
ef
f
ici
en
cy
.
4.
M
AT
E
R
I
AL
S AN
D
M
E
T
H
O
D
T
h
is
p
ar
ag
r
ap
h
in
clu
d
es
a
th
eo
r
etica
l
b
ac
k
g
r
o
u
n
d
to
th
e
to
p
ics,
m
eth
o
d
s
,
an
d
to
o
ls
t
h
at
will
b
e
u
s
ed
in
th
e
p
r
o
p
o
s
ed
s
y
s
tem
.
4
.
1
.
RC4
a
lg
o
ri
t
hm
R
o
n
R
iv
est 1
9
8
7
,
o
n
e
o
f
R
SA's
in
v
en
to
r
s
,
in
tr
o
d
u
ce
d
th
e
alg
o
r
ith
m
R
C
4
.
R
C
4
is
a
“
R
iv
est
C
ip
h
er
4
”
ac
r
o
n
y
m
,
it
is
al
s
o
k
n
o
wn
as
“
R
o
n
'
s
C
o
d
e
4
.
”
T
h
e
alg
o
r
ith
m
r
elies
o
n
a
r
an
d
o
m
p
er
m
u
tatio
n
b
ein
g
u
s
ed
.
T
h
e
R
C
4
alg
o
r
ith
m
is
s
im
p
le
to
d
e
clar
e,
an
d
f
air
ly
s
m
all
[
1
6
]
.
4
.
2
.
Re
t
ina
T
h
e
r
etin
a
m
a
y
b
e
d
ef
in
ed
as
th
e
f
o
llo
win
g
:
T
h
e
o
p
tic
n
er
v
e
is
in
th
e
ce
n
ter
o
f
th
e
r
etin
a
,
a
cir
cu
lar
to
o
v
al
wh
ite
r
eg
io
n
m
ea
s
u
r
in
g
ap
p
r
o
x
im
ately
2
x
1
.
5
m
m
i
n
d
iam
eter
.
T
h
e
m
ain
b
lo
o
d
v
ess
els
o
f
th
e
r
etin
a
ar
is
e
f
r
o
m
th
e
m
id
d
le
o
f
t
h
e
o
p
tic
n
er
v
e.
Nea
r
ly
1
7
d
eg
r
ee
s
(
4
.
5
-
5
m
m
)
,
a
b
o
u
t two
an
d
a
h
alf
-
d
is
k
d
iam
eter
to
th
e
lef
t
o
f
th
e
d
is
k
,
th
e
s
m
all
o
v
al
-
s
h
ap
ed
,
v
ess
el
-
f
r
ee
r
ed
d
i
s
h
s
p
o
t,
b
lo
o
d
th
e
f
o
v
ea
,
ca
n
b
e
o
b
s
er
v
ed
b
y
t
h
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
5
2
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci,
Vo
l.
24
,
No
.
1
,
Octo
b
er
2
0
2
1
:
45
2
-
46
3
454
o
p
h
th
alm
o
lo
g
is
ts
in
t
h
e
ce
n
ter
o
f
th
e
r
eg
io
n
k
n
o
w
n
as
t
h
e
m
ac
u
la
[
1
7
]
,
[
1
8
]
.
T
h
e
r
etin
a
is
th
e
ey
e'
s
in
n
er
m
o
s
t
lay
er
wh
ich
ca
n
b
e
s
ee
n
u
s
in
g
s
u
itab
le
ap
p
lian
ce
s
lik
e
a
f
u
n
d
u
s
ca
m
er
a.
T
h
e
two
m
ain
m
ec
h
an
is
m
s
u
s
ed
in
th
e
p
r
o
ce
s
s
in
g
o
f
r
etin
al
im
a
g
es
ar
e
t
h
e
o
p
tic
d
is
k
an
d
b
lo
o
d
v
ess
els.
T
h
e
o
p
tic
d
is
k
is
th
e
b
r
ig
h
test
r
eg
io
n
in
th
e
im
ag
e
o
f
t
h
e
r
etin
al
an
d
th
e
b
lo
o
d
v
ess
els
em
er
g
e
f
r
o
m
t
h
e
m
id
d
le
[
1
9
]
.
A
r
etin
a
s
ca
n
s
h
o
ws
th
e
lay
o
u
t
o
f
b
lo
o
d
v
ess
els
in
s
id
e
th
e
r
etin
a
[
2
0
]
.
I
n
co
n
tr
ast
with
o
th
er
b
io
m
etr
ics
,
as
a
b
io
m
etr
ic,
th
e
r
etin
a
h
as
a
s
et
o
f
p
r
io
r
ities
.
I
t
is
s
o
s
af
e
an
d
allo
ws
th
e
u
s
e
o
f
a
r
eliab
le
p
h
y
s
io
lo
g
ical
f
u
n
ctio
n
.
Sp
o
o
f
i
n
g
is
to
o
d
if
f
icu
lt.
R
etin
al
p
atter
n
s
f
o
r
lef
t
a
n
d
r
ig
h
t
ey
es
ar
e
d
if
f
er
in
g
.
I
d
en
tical
twin
s
,
o
n
th
e
o
th
er
h
an
d
,
ar
e
u
n
iq
u
e.
Ad
d
itio
n
ally
,
ag
e
d
o
es
n
o
t
af
f
ec
t
r
etin
al
p
atter
n
s
[
2
1
]
,
[
2
2
]
.
T
h
e
im
ag
es
will
n
o
t
m
ar
k
a
d
ec
ea
s
ed
p
er
s
o
n
o
n
th
e
r
etin
a,
u
n
lik
e
o
th
e
r
b
i
o
m
etr
ic
ch
ar
ac
ter
is
tics
.
B
ec
au
s
e
th
e
r
etin
a
is
lo
ca
ted
in
s
id
e
with
in
th
e
e
y
e
o
f
a
h
u
m
an
,
a
n
y
tem
p
o
r
al
o
r
en
v
i
r
o
n
m
en
tal
f
ac
to
r
s
ca
n
s
eld
o
m
af
f
ec
t
it.
T
h
e
r
etin
a
is
th
er
ef
o
r
e
a
s
ig
n
if
ican
t
b
io
m
etr
ic
attr
ib
u
te
f
o
r
th
e
h
i
g
h
est
s
ec
u
r
ity
s
y
s
tem
[
2
3
]
,
[
2
4
]
.
Data
o
f
b
io
m
etr
ic
c
o
u
ld
b
e
u
s
ed
t
o
lo
o
k
f
o
r
b
io
m
etr
ic
d
ata
th
at
is
r
an
d
o
m
to
b
e
u
s
ed
as
r
an
d
o
m
n
u
m
b
e
r
s
eq
u
en
ce
s
(
a
f
ter
e
n
co
d
in
g
i
n
th
e
i
n
teg
er
o
r
b
it
f
o
r
m
at)
.
R
o
b
u
s
t
r
an
d
o
m
n
u
m
b
er
s
ar
e
cr
ea
ted
b
y
th
e
b
io
m
etr
ics
d
ata.
A
f
ig
u
r
e
th
at
s
h
o
ws
a
cr
o
s
s
-
s
ec
tio
n
al
h
u
m
an
e
y
e
with
an
illu
s
tr
atio
n
o
f
a
r
etin
al
im
a
g
e
is
m
en
tio
n
e
d
in
[
2
5
]
,
[
2
6
]
.
4
.
3
.
T
he
a
dv
a
nt
a
g
es a
nd
a
pp
lica
t
io
n o
f
RC4
T
h
e
ad
v
an
tag
es
o
f
th
e
R
C
4
alg
o
r
ith
m
ar
e
th
at
th
e
alg
o
r
ith
m
i
s
ef
f
ec
tiv
e,
s
im
p
le,
an
d
well
-
s
u
ited
f
o
r
p
r
o
g
r
a
m
im
p
lem
en
tatio
n
,
wh
ich
ar
e
d
is
tin
g
u
is
h
ed
b
y
th
ei
r
im
p
lem
e
n
tatio
n
s
p
ee
d
,
d
o
n
o
t
r
e
q
u
ir
e
a
g
r
ea
t
am
o
u
n
t
o
f
s
to
r
ag
e
s
p
ac
e,
an
d
h
as
less
co
m
p
lex
ity
[
1
]
,
a
n
d
it
is
f
r
eq
u
en
tly
u
s
ed
in
p
r
o
to
co
ls
an
d
s
tan
d
a
r
d
s
s
u
ch
a
s
Sk
y
p
e,
W
PA,
W
E
P,
an
d
SS
L
/TL
S
[
1
4
]
.
5.
T
H
E
P
RO
P
O
SE
D
M
E
T
H
O
D
(
RC4
-
RE
T
I
NA)
T
h
e
p
r
o
p
o
s
ed
m
eth
o
d
co
n
s
is
ts
o
f
f
o
u
r
p
ar
ts
(
R
NG
-
R
etin
a
,
Selecte
d
k
ey
s
,
im
p
r
o
v
ed
R
KSA
,
an
d
en
cr
y
p
tio
n
/d
ec
r
y
p
tio
n
)
,
as sh
o
wn
in
F
ig
u
r
e
1.
Fig
u
r
e
1
.
T
h
e
p
r
o
p
o
s
ed
m
eth
o
d
5
.
1
.
RNG
-
r
et
ina
T
h
is
s
tag
e
co
n
s
is
t
s
o
f
s
ev
er
al
s
tep
s
th
at
lead
to
th
e
g
en
er
atio
n
o
f
r
a
n
d
o
m
k
ey
s
.
B
elo
w
is
an
ex
p
lan
atio
n
o
f
th
ese
s
tep
s
:
5
.
1
.
1
.
T
he
prepro
ce
s
s
i
ng
s
t
a
g
e
f
o
r
re
t
ina
im
a
g
e
T
h
e
r
etin
a
im
ag
e
is
p
r
o
ce
s
s
ed
im
p
r
o
v
in
g
d
u
r
in
g
th
e
n
e
x
t step
s
:
−
E
q
u
alize
in
d
i
v
id
u
al
c
o
lo
r
:
W
h
en
p
i
x
el
co
l
o
r
is
a
r
an
d
o
m
v
ec
to
r
d
ef
in
ed
b
y
th
e
r
ed
,
g
r
ee
n
,
an
d
b
l
u
e
co
lo
r
s
r
esp
ec
tiv
ely
,
an
d
th
e
t
o
tal
d
en
s
ity
f
u
n
ctio
n
ad
d
e
d
t
o
ea
ch
v
ec
to
r
,
th
e
h
is
to
g
r
a
m
o
f
ea
ch
co
l
o
r
wo
u
ld
b
e
eq
u
alize
d
.
T
h
is
b
eh
av
io
r
wo
u
ld
allo
w
th
e
im
ag
e'
s
lo
ca
l
f
ea
tu
r
es
to
b
ec
o
m
e
m
o
r
e
v
is
ib
le
an
d
clea
r
er
th
an
b
ef
o
r
e
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4
7
5
2
Th
e
s
ec
u
r
ity
o
f R
C
4
a
lg
o
r
ith
m
u
s
in
g
ke
ys g
en
era
tio
n
d
ep
e
n
d
in
g
o
n
u
s
er's retin
a
(
Hu
d
a
M.
S
a
lih
)
455
−
Gr
ay
s
ca
le
co
n
v
er
s
io
n
:
B
ec
au
s
e
th
e
co
lo
r
im
ag
e
h
as
a
th
r
ee
-
d
im
en
s
io
n
al
s
tr
u
ctu
r
e,
th
e
p
r
o
ce
s
s
in
g
o
f
th
e
im
ag
e
is
a
lo
n
g
an
d
co
m
p
lic
ated
is
s
u
e.
T
h
e
s
o
lu
tio
n
to
t
h
is
is
s
u
e
r
esid
es
in
th
e
co
n
v
er
s
io
n
o
f
th
e
g
r
ay
s
ca
le.
T
h
e
co
lo
r
ed
im
ag
e
wo
u
ld
b
e
tr
an
s
f
o
r
m
ed
in
t
o
a
g
r
ay
s
ca
le
im
ag
e
b
y
m
ea
s
u
r
in
g
t
h
e
av
er
ag
e
o
f
ea
ch
p
ix
el
co
m
p
o
n
en
t.
−
C
las
s
ical
h
is
to
g
r
am
eq
u
aliza
ti
o
n
:
I
t
is
a
m
eth
o
d
o
f
eq
u
aliz
in
g
th
e
h
is
to
g
r
am
o
f
t
h
e
en
te
r
ed
im
ag
e
to
en
h
an
ce
th
e
c
o
n
tr
ast,
s
u
ch
th
at
it
is
a
g
l
o
b
al
o
p
er
atio
n
.
T
h
e
f
r
eq
u
en
cy
at
e
v
er
y
g
r
a
y
lev
el
o
cc
u
r
s
f
r
o
m
b
lack
(
0
)
to
w
h
ite
(
2
5
5
)
an
d
t
h
e
h
is
to
g
r
a
m
is
p
lo
tted
.
B
y
ta
k
in
g
t
h
e
g
r
ay
lev
el
o
f
th
e
im
a
g
e
p
ix
el
as
a
r
an
d
o
m
v
ec
to
r
a
n
d
im
p
o
s
in
g
th
e
cu
m
u
lativ
e
d
e
n
s
ity
f
u
n
c
tio
n
o
n
it,
th
e
p
ix
el
g
r
ay
lev
el
wo
u
ld
b
e
u
n
if
o
r
m
ly
d
is
tr
ib
u
ted
th
r
o
u
g
h
o
u
t th
e
im
ag
e
.
5
.
1
.
2
.
Seg
m
ent
a
t
io
n us
ing
g
ra
y
-
s
ca
le
mo
rpho
lo
g
y
T
h
e
p
u
r
p
o
s
e
o
f
th
e
s
eg
m
en
tati
o
n
o
f
th
e
im
ag
e
is
to
o
b
tain
th
e
m
ain
f
ea
tu
r
es wh
ich
ar
e
o
b
v
io
u
s
in
th
e
im
ag
e.
T
h
e
u
s
ag
e
o
f
m
o
r
p
h
o
l
o
g
ical
p
r
o
ce
s
s
es
with
g
r
ay
s
ca
le
is
th
en
u
s
ed
to
s
eg
m
e
n
t
th
e
im
ag
e
a
n
d
to
g
ain
b
lo
o
d
v
ess
els
in
th
e
r
etin
a.
T
h
e
k
ey
m
o
r
p
h
o
lo
g
ical
o
p
e
r
atio
n
s
ar
e
d
ilatatio
n
,
er
o
s
io
n
o
p
e
n
in
g
,
an
d
clo
s
in
g
;
in
th
is
r
esear
ch
,
o
p
en
i
n
g
an
d
to
p
an
d
h
itti
n
g
o
p
er
atio
n
s
ar
e
u
s
ed
with
th
e
s
tr
u
ctu
r
al
elem
en
t o
f
th
e
d
iam
o
n
d
f
o
r
m
an
d
th
e
s
ca
le
5
×5
.
Op
en
in
g
a
ctio
n
elim
in
ates
tin
y
item
s
f
r
o
m
th
e
f
o
r
eg
r
o
u
n
d
o
f
th
e
im
ag
e
an
d
p
u
ts
th
em
in
th
e
b
ac
k
g
r
o
u
n
d
.
Sin
ce
th
ese
b
lo
o
d
v
ess
els
ar
e
d
ar
k
-
g
r
a
y
in
co
lo
r
,
m
o
r
p
h
o
lo
g
ical
t
o
p
-
h
at
a
n
d
im
ag
e
s
u
b
tr
ac
tio
n
o
p
er
atio
n
s
ar
e
d
o
n
e
to
ac
q
u
ir
e
wh
ite
-
co
lo
r
e
d
b
lo
o
d
v
ess
els
as
a
f
o
r
eg
r
o
u
n
d
.
T
h
e
o
p
en
in
g
ca
n
b
e
d
escr
ib
ed
b
y
th
e
s
tr
u
ct
u
r
in
g
el
e
m
en
t
N
as
th
e
d
ilatio
n
o
f
th
e
er
o
s
io
n
o
f
i
m
ag
e
H.
T
h
e
im
a
g
e
in
g
r
ay
s
ca
le
H
is
a
f
u
n
ctio
n
wh
er
e
th
e
d
o
m
ain
i
s
a
two
-
d
im
e
n
s
io
n
al
d
ig
itized
s
p
ac
e
s
u
b
s
et
Z
×
Z
.
T
o
ev
e
r
y
p
o
in
t q
∈
Z
×
Z
,
th
e
tr
an
s
latio
n
o
f
H
b
y
q
is
d
escr
i
b
ed
b
y
:
(
H
)
q=
{
s
+q
|
∀
s
∈
H
}
(
1
)
a
nd
d
ilatio
n
a
n
d
er
o
s
io
n
ar
e
o
f
f
er
ed
b
y
(
th
e
s
tr
u
ct
u
r
in
g
elem
en
t N
)
r
esp
ec
tiv
ely
[
2
7
]
.
H
⊖
N=
m
in
{
(
Hq
)
}
|
q
∈
N
}
=
m
in
q
∈
N
(
H
)
q
(
2
)
H
⊕
N
=
Ma
x
{(
H)
q
|
q
∈
N=
m
ax
q
∈
N
(
H
)
q
(
3
)
T
h
e
wh
ite
to
p
-
h
at
tr
an
s
f
o
r
m
i
s
a
v
ar
iatio
n
o
f
s
o
m
e
s
tr
u
ctu
r
in
g
elem
en
t
b
etwe
en
th
e
in
p
u
t
im
ag
e
an
d
its
o
p
en
in
g
.
5
.
1
.
3
.
P
ix
el
ent
ro
py
f
ea
t
ure
e
x
t
ra
ct
io
n us
ing
t
wo
dim
ens
io
ns
' m
a
x
im
um
ent
ro
py
t
hre
s
ho
ld m
et
ho
d
T
h
e
2
D
m
ax
im
u
m
en
t
r
o
p
y
th
r
esh
o
ld
m
et
h
o
d
will
b
e
p
e
r
f
o
r
m
ed
f
o
r
f
o
llo
win
g
th
e
p
r
o
ce
s
s
in
g
an
d
s
eg
m
en
tatio
n
o
f
th
e
r
etin
a
i
m
ag
e.
T
h
is
will
ex
tr
ac
t
a
p
ix
el
en
tr
o
p
y
f
ea
tu
r
e
wh
ich
will
b
e
u
s
ed
f
o
r
f
u
tu
r
e
p
r
o
ce
d
u
r
e
f
o
r
g
en
er
atin
g
k
ey
s
at
th
e
s
tag
e
o
f
lin
ea
r
in
ter
p
o
l
atio
n
.
A
f
ir
s
t
s
tep
o
f
t
h
e
2
D
e
n
tr
o
p
y
th
r
esh
o
ld
i
n
g
ap
p
r
o
ac
h
is
to
co
n
s
tr
u
ct
a
2
D
h
is
to
g
r
am
b
y
ca
lc
u
latin
g
t
h
e
f
r
eq
u
en
c
y
in
cid
en
ce
o
f
ea
ch
p
a
ir
o
f
th
e
g
r
ay
lev
el
o
f
ea
ch
p
ix
el
an
d
its
n
eig
h
b
o
r
h
o
o
d
'
s
av
er
ag
e
g
r
ay
-
lev
el
v
a
lu
e.
T
h
e
s
ec
o
n
d
s
tep
is
to
ca
lcu
late
2
D
en
tr
o
p
y
u
s
in
g
(
4
)
.
Ass
u
m
e
m
i
r
ef
er
s
to
th
e
n
u
m
b
er
o
f
p
ix
els
th
at
th
e
g
r
ay
v
alu
e
is
i.
T
h
e
g
r
ay
p
r
o
b
ab
ilit
y
is
d
escr
ib
ed
b
y
th
e
(
4
)
.
T
h
e
f
ij r
e
f
er
s
to
th
e
n
u
m
b
e
r
o
f
p
ix
els,
th
e
g
r
ay
v
alu
e
b
ein
g
i a
n
d
t
h
e
av
er
a
g
e
g
r
a
y
v
alu
e
b
ein
g
j.
M=
∑
m
i.
q
ij=
f
ij
/
M
L
-
1
i=0
(
4
)
Su
p
p
o
s
e
th
at
g
is
a
p
ix
el
g
r
ey
v
alu
e.
T
is
a
p
ix
el
av
e
r
ag
e
-
g
r
a
y
v
alu
e.
T
h
e
co
m
p
u
tatio
n
o
f
i
n
f
o
r
m
atio
n
en
tr
o
p
y
is
d
escr
ib
ed
b
y
(
5
)
to
a
p
air
o
f
v
alu
es (
g
,
t)
[
28
].
∅
(
g
.
t
)
=
ln
(
∑
∑
q
t
j=0
ij)+
ln
(
∑
∑
q
ij)
-
∑
∑
pij
ln
pij
t
j=0
g
i=0
∑
∑
pij
t
j=0
g
i=0
L
-
1
j=t+
1
L
-
1
i=g+
1
-
∑
∑
pij
ln
pij
L
-
1
j=t+
1
L
-
1
i=g+
1
∑
∑
pij
L
-
1
j=t+
1
L
-
1
i=g+
1
g
i=0
(
5
)
5
.
1
.
4
.
Det
er
m
ina
t
i
o
n o
f
re
t
in
a
ce
nte
r
T
h
e
co
n
v
en
tio
n
al
C
an
n
y
ed
g
e
d
etec
tio
n
ac
h
iev
es
ev
e
n
in
h
ig
h
ly
d
is
to
r
ted
im
a
g
es
to
d
e
tect
ed
g
es.
Usi
n
g
a
Gau
s
s
ian
f
ilter
m
ask
to
cr
ea
te
a
s
m
o
o
th
im
ag
e.
An
a
lg
o
r
ith
m
f
o
r
a
d
ap
tab
le
ca
n
n
y
co
u
ld
b
e
d
escr
ib
e
d
b
y
tr
an
s
f
o
r
m
in
g
th
e
c
o
lo
r
im
ag
e
to
a
g
r
ay
s
ca
le
im
ag
e,
d
et
ec
tin
g
ed
g
es
u
s
in
g
a
2
D
Gau
s
s
ian
g
r
ad
ien
t
ed
g
e
d
etec
to
r
b
y
u
s
in
g
th
e
eq
u
atio
n
wh
er
e
th
e
s
ig
m
a
1
=
2
an
d
s
eg
m
a2
=2
an
d
p
er
f
o
r
m
i
n
g
th
i
n
n
in
g
b
y
u
s
in
g
th
e
lo
ca
tio
n
o
f
th
e
th
r
esh
o
ld
p
ar
am
eter
as
alp
h
a=
0
.
7
to
d
ec
id
e
th
e
last
co
llectio
n
o
f
p
ix
el
s
.
T
h
e
b
lack
p
ix
e
ls
r
ep
r
esen
t
th
e
s
ig
n
i
f
ican
t
s
p
o
t
s
in
th
e
im
ag
e
o
n
t
h
e
r
etin
a
v
ess
els.
T
h
r
o
u
g
h
h
av
in
g
a
m
ax
im
u
m
o
f
x
,
y
;
a
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
5
2
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci,
Vo
l.
24
,
No
.
1
,
Octo
b
er
2
0
2
1
:
45
2
-
46
3
456
m
in
im
u
m
o
f
x
,
y
;
a
n
d
im
p
le
m
en
tin
g
lin
ea
r
in
ter
p
o
latio
n
b
etwe
en
th
em
,
th
e
r
esu
ltin
g
x
,
y
will
r
ep
r
esen
t
th
e
m
id
p
o
in
t a
n
d
th
e
m
id
d
le
o
f
th
e
r
etin
a
g
r
id
will b
e
it is
co
o
r
d
in
ate.
5
.
1
.
5
.
L
inea
r
inte
rpo
la
t
io
n im
plem
ent
a
t
io
n
T
h
e
lin
ea
r
in
ter
p
o
latio
n
tech
n
iq
u
e
is
im
p
lem
en
ted
b
etwe
e
n
th
e
p
o
s
itio
n
o
f
th
e
r
etin
a
c
o
r
e
an
d
to
o
b
tain
n
ew
p
o
in
ts
o
f
en
tr
o
p
y
wh
o
s
e
co
o
r
d
in
ates
lo
ca
te
th
e
m
ajo
r
v
alu
es.
T
h
is
s
tep
is
d
o
n
e
to
in
cr
ea
s
e
th
e
n
u
m
b
er
o
f
p
o
i
n
ts
o
n
t
h
e
p
r
o
ce
s
s
ed
r
etin
a
im
ag
e
a
n
d
t
h
er
eb
y
to
in
cr
ea
s
e
t
h
e
len
g
t
h
o
f
th
e
g
en
er
ated
k
ey
.
T
h
e
R
NG
-
R
et
in
a
is
to
g
en
er
ate
tr
u
e
r
an
d
o
m
n
u
m
b
er
s
(
T
R
N)
,
E
a
ch
iter
atio
n
(
n
u
m
b
e
r
o
f
iter
ati
o
n
s
n
=0
to
2
5
5
)
is
u
s
ed
o
f
2
4
b
its
(
R
K2
,
R
K
3
,
a
n
d
R
K4
ev
er
y
h
av
e
8
b
its
in
o
r
d
er
)
.
An
d
th
e
n
u
m
b
e
r
o
f
b
its
to
R
K1
d
ep
en
d
s
o
n
th
e
len
g
th
o
f
th
e
b
asic k
ey
(
B
K)
.
5
.
2
.
Select
ed
k
ey
s
Fro
m
th
e
p
r
ev
io
u
s
s
tep
,
b
o
th
wer
e
s
elec
ted
R
K1
,
R
K2
,
R
K
3
,
an
d
R
K4
.
R
K1
=
8
b
its
,
R
K2
=
8
b
its
,
R
K3
=
8
b
its
,
R
K1
=
its
l
e
n
g
t
h
d
e
p
en
d
s
o
n
th
e
len
g
th
o
f
th
e
b
asic
k
e
y
I
m
p
r
o
v
ed
b
asic
k
ey
(
I
B
K)
=
B
K
Å
R
K1
.
5
.3
.
I
m
pro
v
ed
k
e
y
s
cheduli
ng
(
I
K
SA)
T
h
e
I
KSA
was
in
v
en
ted
as
an
im
p
r
o
v
e
m
en
t
f
o
r
KSA,
an
d
th
e
p
er
m
u
tatio
n
o
f
S
was
ch
an
g
ed
to
b
ased
o
n
tr
u
ly
r
a
n
d
o
m
v
alu
es
R
K2
,
R
K3
,
an
d
lB
K
.
Alg
o
r
ith
m
1.
(
R
C
4
–
R
etin
a
Alg
o
r
ith
m
)
Input: Message M, LBk
Output: Cipher text
Step 1: /Initialize /
for j = 0 to 255
S[j] = j
T[j] = lK[j mod LBK];
Next j
Step 2: / Do IP of S /
For w=0 to 255
RK2w = Location: generate from the RNG
-
Retina
RK3w = Location: generate from the RNG
-
Retina
i = (RK3w + S [ RK2w] + T [ RK2w]) mod255
Swap (i, S (RK2w])
Next w
Step 3: /Stream Generation/
Set [j, i] = 0
While (true)=0
j = (j + 1) mod 256;
i = (i + S
[j]) mod 256;
Swap (S[i], S[j]);
t = (S[j] + S[i]) mod 256;
lk = S[t];
RK4: produced from RNG
-
Retina
Step 4:/ Encryption, Decryption /
C = (M
⨁
LK
⨁
K4) mod256
= (
⊕
LK
⊕
K4
)
mo
d
25
6
Step 5:/End
6.
R
E
SU
L
T
S AN
D
T
E
ST
I
NG
6
.
1
.
K
ey
g
ener
a
t
io
n
R
an
d
o
m
k
ey
s
ar
e
g
en
er
ate
d
u
s
in
g
th
e
R
NG
-
R
etin
a
g
en
er
ato
r
,
as
s
h
o
wn
b
y
s
o
m
e
r
esu
lts
b
elo
w,
as
s
h
o
wn
in
Fig
u
r
e
2.
Fig
u
r
e
2
il
lu
s
tr
ates
th
e
r
esu
lts
o
f
th
e
cr
y
p
to
-
k
ey
g
e
n
er
atio
n
b
y
u
s
in
g
m
atr
ix
6
4
X
6
4
f
illed
with
th
e
v
alu
es
o
f
a
o
ne
-
d
im
en
s
io
n
al
lo
g
is
tic
f
u
n
ctio
n
wit
h
a
s
tar
tin
g
v
alu
e
o
f
x
=0
.
1
a
n
d
2
=
4
as
s
h
o
wn
in
F
ig
u
r
e
s
2
(
a)
a
nd
(
b
)
an
d
th
e
co
o
r
d
in
ates
o
f
th
e
p
o
i
n
ts
o
f
th
e
r
etin
a
d
eter
m
in
e
th
e
k
ey
v
alu
es
o
f
th
e
ch
ao
tic
m
atr
ix
u
s
ed
f
o
r
en
cr
y
p
tio
n
a
f
ter
war
d
.
Fig
u
r
e
3
illu
s
tr
ates
th
e
ef
f
e
cts
o
f
k
ey
g
en
er
atio
n
b
y
u
s
in
g
m
atr
ix
6
4
X
6
4
f
illed
with
s
eq
u
e
n
tial n
u
m
b
er
s
.
I
n
th
e
m
atr
i
x
o
f
c
o
n
s
ec
u
ti
v
e
n
u
m
b
er
s
,
th
e
r
etin
a
p
o
in
ts
c
o
o
r
d
in
ates f
in
d
th
e
k
ey
v
alu
es,
as sh
o
wn
in
F
ig
u
r
e
3
(
a)
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4
7
5
2
Th
e
s
ec
u
r
ity
o
f R
C
4
a
lg
o
r
ith
m
u
s
in
g
ke
ys g
en
era
tio
n
d
ep
e
n
d
in
g
o
n
u
s
er's retin
a
(
Hu
d
a
M.
S
a
lih
)
457
(
a)
(
b
)
(
c)
(
d
)
Fig
u
r
e
2
. T
h
e
cr
y
p
to
-
k
ey
s
g
en
er
ated
;
(
a)
th
e
ta
b
le
s
h
o
ws th
e
n
u
m
b
er
s
o
b
tain
ed
at
t
h
e
b
eg
i
n
n
in
g
o
f
t
h
e
lo
g
is
tic
f
u
n
ctio
n
c
o
n
d
itio
n
s
,
(
b
)
m
atr
ix
6
4
X
6
4
f
illed
w
ith
I
D
lo
g
is
tic
f
u
n
ctio
n
v
alu
es,
(
c
)
a
g
r
a
p
h
s
h
o
ws th
e
b
eh
av
io
r
an
d
th
e
r
a
n
d
o
m
n
u
m
b
er
d
is
tr
ib
u
tio
n
g
en
er
ated
wi
th
t
h
e
u
s
e
o
f
th
e
ch
a
o
tic
f
u
n
ctio
n
s
y
s
tem
ab
o
v
e
a
n
d
(
d
)
th
e
c
o
o
r
d
in
ates o
f
th
e
r
etin
a
p
o
in
ts
,
in
co
n
tr
ast to
th
e
k
e
y
v
alu
es o
f
th
e
c
h
ao
tic
m
atr
ix
(
a)
(
b
)
Fig
u
r
e
3.
T
h
e
k
e
y
s
g
en
er
ated
;
(
a
)
I
n
a
ch
ao
tic
m
atr
i
x
,
lo
ca
te
k
ey
v
alu
e
s
b
y
th
e
r
etin
a
p
o
i
n
t
co
o
r
d
in
ates
an
d
(
b
)
a
c
h
ar
t illu
s
tr
ates th
e
b
eh
a
v
io
r
an
d
d
is
tr
ib
u
tio
n
o
f
t
h
e
k
e
y
s
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
5
2
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci,
Vo
l.
24
,
No
.
1
,
Octo
b
er
2
0
2
1
:
45
2
-
46
3
458
6
.
2
.
E
ncry
ptio
n
T
wo
s
ets
o
f
m
ess
ag
es
ar
e
en
co
d
ed
v
o
lu
m
es
(
1
0
2
4
,
2
0
4
8
,
4
0
9
6
,
8
1
9
2
,
an
d
1
6
3
8
4
)
,
u
s
in
g
two
s
ets
o
f
k
ey
s
in
len
g
th
(
1
2
8
,
256,
5
1
2
,
1
0
2
4
,
a
n
d
2
0
4
8
)
,
an
d
u
s
in
g
th
e
s
tan
d
ar
d
R
C
4
alg
o
r
ith
m
an
d
th
e
p
r
o
p
o
s
ed
alg
o
r
ith
m
(
im
p
r
o
v
e
R
C
4
–
R
etin
a)
.
So
th
at
th
e
e
n
cr
y
p
tio
n
p
r
o
ce
s
s
is
d
o
n
e
ac
co
r
d
i
n
g
to
:
−
Dif
f
er
en
t
m
ess
ag
es
-
f
ix
ed
k
ey
s
.
−
Dif
f
er
en
t
k
ey
s
-
f
i
x
ed
m
ess
ag
es
.
6
.
3
.
A
v
er
a
g
e
s
ec
re
cy
o
f
c
ip
her
T
ab
le
1
an
d
th
e
f
i
g
u
r
es
o
f
ch
a
r
ts
as
s
h
o
wn
in
Fig
u
r
e
s
4
-
8
,
s
h
o
w
t
h
e
p
r
o
p
o
s
ed
R
C
4
-
R
etin
a
alg
o
r
ith
m
h
as
h
ig
h
er
av
er
ag
e
s
ec
r
ec
y
th
an
th
e
tr
ad
itio
n
al
R
C
4
-
KSA
alg
o
r
ith
m
an
d
R
KSA
wit
h
en
h
an
ce
d
R
C
4
alg
o
r
ith
m
(
R
C
4
–
R
etin
a)
u
s
i
n
g
v
ar
io
u
s
m
ess
ag
es
s
izes
(
2
10
,
2
11
,
2
12
,
2
13
,
an
d
2
14
b
its
)
,
as
well
a
s
a
s
et
f
ix
ed
k
ey
len
g
t
h
f
o
r
ea
ch
s
tep
(
2
7
, 2
8
, 2
9
, 2
10
,
a
n
d
2
11
b
its
)
.
T
ab
le
1.
Av
e
r
ag
e
s
ec
r
ec
y
o
f
ci
p
h
er
-
d
i
f
f
er
en
t
m
ess
ag
e
s
ize,
f
ix
ed
k
e
y
s
len
g
th
A
v
e
r
a
g
e
S
e
c
r
e
c
y
o
f
C
i
p
h
e
r
K
e
y
s
l
e
n
g
t
h
/
B
i
t
s
M
e
ss
a
g
e
s Si
z
e
/
B
i
t
s
S
t
a
n
d
a
r
d
R
C
4
w
i
t
h
K
S
A
P
r
o
p
o
se
d
M
e
t
h
o
d
R
C
4
-
R
e
t
i
n
a
1
2
8
1
0
2
4
2
0
4
8
4
0
9
6
8
1
9
2
1
6
3
8
4
0
.
3
2
9
0
.
1
9
7
0
.
2
9
5
0
.
2
4
7
0
.
1
7
7
0
.
6
9
9
9
0
.
7
7
9
6
0
.
7
5
5
0
.
7
6
6
1
0
.
5
8
3
8
2
5
6
1
0
2
4
2
0
4
8
4
0
9
6
8
1
9
2
1
6
3
8
4
0
.
4
1
8
0
.
2
1
4
0
.
3
3
3
0
.
1
4
3
0
.
4
4
8
0
.
7
8
1
2
0
.
5
2
2
1
0
.
7
9
3
9
0
.
7
8
8
7
0
.
6
6
2
5
5
1
2
1
0
2
4
2
0
4
8
4
0
9
6
8
1
9
2
1
6
3
8
4
0
.
5
3
2
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I
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M
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p
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M
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5
5
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6
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6
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8.
CO
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SI
O
N
W
ith
in
th
is
p
ap
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,
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e
f
o
llo
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s
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an
d
ac
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e
R
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4
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R
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a
Alg
o
r
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m
:
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alg
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r
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es
th
e
alg
o
r
ith
m
'
s
p
r
o
d
u
ctiv
ity
an
d
im
p
r
o
v
es
an
d
en
h
an
ce
s
its
av
er
ag
e
s
ec
r
ec
y
th
r
o
u
g
h
in
c
r
ea
s
in
g
ef
f
icien
c
y
an
d
in
c
r
ea
s
in
g
th
e
en
cr
y
p
tio
n
tim
e,
i.e
.
,
R
C
4
-
R
etin
a
alg
o
r
ith
m
g
av
e
b
etter
r
esu
lts
in
ter
m
s
o
f
s
p
ee
d
a
n
d
ex
ec
u
tio
n
tim
e
co
m
p
ar
ed
with
an
o
t
h
er
p
r
ev
io
u
s
R
C
4
alg
o
r
ith
m
.
A
m
o
d
er
n
,
s
ec
u
r
e
s
y
s
tem
is
co
n
s
tr
u
cted
with
u
n
p
r
e
d
ictab
ilit
y
an
d
u
n
i
q
u
e
k
ey
s
b
ased
o
n
r
etin
a
im
ag
es.
T
h
e
ap
p
r
o
ac
h
u
s
es
th
e
ad
v
an
ta
g
e
o
f
th
e
s
p
ee
d
s
o
f
co
m
p
u
ter
p
r
o
ce
s
s
in
g
,
a
ch
ao
t
ic
m
ap
,
an
d
b
io
m
etr
ic
d
ata
t
o
g
en
er
ate
r
o
b
u
s
t
cip
h
er
k
ey
s
with
o
u
t
n
ee
d
in
g
co
m
p
licated
s
eq
u
e
n
ce
s
to
m
e
m
o
r
ize
th
at
co
u
ld
b
e
s
to
len
,
o
r
p
er
h
a
p
s
an
ticip
ated
to
b
e
lo
s
t.
I
n
th
is
s
tu
d
y
,
th
e
im
p
r
o
v
e
d
R
C
4
alg
o
r
ith
m
with
R
KSA
b
ased
o
n
lo
g
i
s
tic
m
ap
s
is
p
r
o
p
o
s
ed
(
R
C
4
-
R
etin
a
alg
o
r
ith
m
)
.
T
h
is
alg
o
r
ith
m
o
v
er
co
m
es
th
e
wea
k
n
ess
o
f
th
e
o
r
i
g
in
al
R
C
4
with
KSA.
T
h
e
av
er
ag
e
s
ec
r
ec
y
f
o
r
th
e
p
r
o
p
o
s
ed
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