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[
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I
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2722
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3221
C
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s
t
h
at
ar
e
p
r
esen
tl
y
u
s
ed
b
y
in
d
u
s
tr
ies
f
o
r
s
y
m
m
e
tr
ic
k
e
y
e
n
cr
y
p
tio
n
alg
o
r
it
h
m
s
w
h
ich
d
ev
o
lv
e
s
t
h
e
alg
o
r
it
h
m
to
b
ein
g
co
n
d
itio
n
all
y
s
ec
u
r
ed
(
cip
h
er
tex
t
ca
n
b
e
d
ec
r
y
p
ted
to
p
lai
n
te
x
t
w
it
h
o
u
t
k
e
y
k
n
o
w
led
g
e
o
v
er
a
lo
n
g
d
u
r
atio
n
o
f
ti
m
e,
t
h
at
ca
n
b
e
m
o
r
e
th
an
t
h
e
m
ess
a
g
e
’
s
ti
m
e
to
li
v
e)
.
Usi
n
g
t
h
e
au
d
io
b
ased
T
R
NG
k
e
y
w
o
u
ld
r
en
d
er
th
e
s
a
m
e
en
cr
y
p
tio
n
al
g
o
r
ith
m
as
u
n
co
n
d
itio
n
al
l
y
s
ec
u
r
ed
(
cip
h
er
tex
t
d
o
es
n
’
t
co
n
tain
s
u
f
f
icie
n
t
d
ata
to
u
n
iq
u
el
y
d
eter
m
i
n
e
t
h
e
p
l
ai
n
te
x
t
w
it
h
o
u
t
k
e
y
k
n
o
w
led
g
e)
.
Au
d
io
R
ec
o
r
d
in
g
s
in
g
en
er
al
ar
e
ca
p
ab
le
en
o
u
g
h
to
p
r
o
d
u
ce
tr
u
l
y
r
an
d
o
m
n
u
m
b
er
s
.
Ho
w
e
v
er
,
w
e
h
av
e
tr
ied
to
co
n
s
id
er
a
s
p
ec
ia
l
u
s
e
ca
s
e
w
h
er
e
a
u
s
er
e
n
d
s
u
p
w
it
h
a
liv
e
r
ec
o
r
d
in
g
w
i
th
o
u
t
ac
tu
all
y
s
p
ea
k
i
n
g
(
m
a
y
o
cc
u
r
i
f
t
h
e
u
s
er
u
s
e
s
a
h
ea
d
s
et
w
it
h
a
f
a
u
lt
y
m
ic)
,
wh
ich
w
o
u
ld
r
esu
lt
in
a
s
tatic
a
u
d
io
r
ec
o
r
d
in
g
.
T
o
ac
co
m
m
o
d
ate
th
i
s
s
ce
n
ar
io
,
th
e
m
o
d
u
lo
in
te
g
er
v
al
u
e
o
f
th
e
cu
r
r
en
t
s
y
s
te
m
d
ate
an
d
ti
m
e
is
u
tili
ze
d
to
f
u
r
th
er
r
an
d
o
m
ize
th
e
p
r
o
g
r
a
m
o
u
tp
u
t.
Up
o
n
ex
ec
u
tio
n
,
th
e
li
g
h
t
w
eig
h
t
A
u
d
io
b
ased
T
R
N
Ke
y
Gen
er
ato
r
p
r
o
g
r
a
m
(
p
r
o
o
f
o
f
co
n
ce
p
t
w
as
cr
ea
ted
u
s
i
n
g
J
A
V
A
1
3
)
p
r
o
d
u
ce
s
a
r
an
d
o
m
ized
6
4
-
b
it
b
in
ar
y
k
e
y
wh
ich
ca
n
b
e
d
ir
ec
tly
u
s
ed
as
a
k
e
y
in
p
u
t
in
an
y
cr
y
p
to
g
r
ap
h
ic
s
y
m
m
etr
ic
k
e
y
al
g
o
r
ith
m
s
u
c
h
as
A
d
v
an
ce
d
E
n
cr
y
p
tio
n
Sta
n
d
ar
d
(
A
E
S
-
2
5
6
)
,
T
r
ip
le
Data
E
n
cr
y
p
tio
n
A
lg
o
r
it
h
m
(
T
DE
S
o
r
3
DE
S),
On
e
-
T
i
m
e
-
P
ad
(
OT
P
)
,
etc.
Fu
tu
r
e
en
h
a
n
ce
m
en
ts
ar
e
p
lan
n
ed
to
v
ar
iab
lize
th
e
f
i
n
al
o
u
tp
u
t
k
e
y
s
ize
s
o
th
e
p
r
o
g
r
am
ca
n
p
r
o
d
u
ce
k
e
y
s
o
f
v
ar
iab
le
len
g
th
s
u
c
h
as 2
5
6
b
its
,
5
1
2
b
its
,
1
0
2
4
b
its
,
etc.
P
s
eu
d
o
R
an
d
o
m
Nu
m
b
er
Gen
er
ato
r
s
(
P
R
NG)
ar
e
u
s
ed
to
g
e
n
er
ate
s
y
m
m
etr
ic
o
r
as
y
m
m
etr
ic
k
e
y
s
to
b
e
u
s
ed
in
en
cr
y
p
tio
n
al
g
o
r
ith
m
s
.
T
h
er
e
ar
e
m
a
n
y
w
a
y
s
P
R
NGs
ca
n
b
e
co
m
p
r
o
m
is
ed
.
On
e
o
f
th
e
p
o
s
s
ib
l
e
attac
k
s
to
co
m
p
r
o
m
i
s
e
t
h
e
P
R
NGs
i
s
to
attac
k
t
h
e
r
e
s
p
ec
tiv
e
alg
o
r
it
h
m
t
h
r
o
u
g
h
w
h
ic
h
t
h
e
r
an
d
o
m
g
en
er
ato
r
i
s
w
o
r
k
i
n
g
an
d
m
ak
i
n
g
th
e
k
e
y
s
p
r
ed
ictab
le,
th
u
s
m
a
k
in
g
P
R
NG
a
d
eter
m
in
i
s
tic
m
ac
h
i
n
e.
S.
In
d
a
rja
n
i
,
G
.
S
u
p
riy
a
tn
o
,
A
.
Nu
g
ra
h
a
a
n
d
I.
M
.
M
.
A
sta
wa
[
4
]
test
ed
th
e
P
s
e
u
d
o
r
an
d
o
m
n
u
m
b
er
g
en
er
ato
r
s
w
it
h
I
n
s
er
tio
n
A
ttac
k
an
d
ef
f
ec
t
s
o
f
it
o
n
P
R
NG
u
s
in
g
N
I
ST
(
Natio
n
al
I
n
s
titu
te
o
f
Stan
d
ar
d
s
an
d
T
ec
h
n
o
lo
g
y
)
R
an
d
o
m
n
e
s
s
T
o
o
l
.
P
r
ev
io
u
s
r
esear
ch
es
co
n
cl
u
d
e
d
th
at
in
s
er
ti
n
g
a
s
in
g
le
b
it
f
o
r
attac
k
in
g
P
R
NG
i
m
p
le
m
e
n
t
ed
A
E
S
h
ad
1
7
.
7
%
f
ailed
test
s
f
o
r
A
E
S
-
1
2
8
an
d
2
4
.
4
4
%
f
o
r
A
E
S
-
192
[
5
]
.
R
esear
ch
er
s
f
r
o
m
I
n
d
o
n
es
ia
co
n
d
u
cted
test
s
o
n
f
o
u
r
alg
o
r
ith
m
s
o
f
P
R
NG
s
,
A
E
S
s
tan
d
ar
d
P
R
NG,
A
NSI
X9
.
3
1
i.e
.
NI
ST
r
ec
o
m
m
e
n
d
ed
R
NG,
Dr
ag
o
n
Stre
a
m
C
ip
h
er
a
n
d
R
ab
b
it
Stre
a
m
C
ip
h
er
u
s
in
g
co
n
ce
p
ts
o
f
NI
ST
r
an
d
o
m
n
ess
test
to
o
l
w
i
th
a
lev
e
l
o
f
s
i
g
n
i
f
ican
ce
=
0
.
0
1
an
d
co
n
clu
d
ed
th
at
th
e
D
r
ag
o
n
Stre
a
m
C
ip
h
er
alg
o
r
it
h
m
to
b
e
th
e
s
tr
o
n
g
es
t
a
m
o
n
g
a
ll
f
o
u
r
[
6
]
.
A
E
S
w
a
s
f
o
u
n
d
to
b
e
s
ev
er
el
y
co
m
p
r
o
m
is
ed
at
t
h
e
b
lo
ck
lev
el
a
n
d
co
n
clu
d
ed
th
at
i
n
s
er
tio
n
at
t
ac
k
u
s
in
g
b
its
ca
n
co
m
p
r
o
m
is
e
t
h
e
c
h
ar
ac
ter
is
tic
r
an
d
o
m
n
e
s
s
o
f
tar
g
et
s
eq
u
e
n
ce
s
[
7
]
.
So
m
e
P
R
NGs
ca
n
b
e
co
m
p
r
o
m
is
e
d
u
s
i
n
g
a
k
n
o
w
n
p
lain
te
x
t a
ttac
k
.
Ah
m
ad
Am
r
o
a
n
d
E
l
-
Sa
y
ed
M.
E
l
-
A
l
f
y
[
8
]
tr
ied
to
i
m
p
r
o
v
e
t
h
e
P
R
NG
b
ased
te
x
t
E
n
cr
y
p
t
io
n
a
n
d
an
al
y
s
ed
th
e
P
R
NGs
f
o
r
th
e
k
n
o
w
n
p
lai
n
te
x
t
attac
k
.
T
h
e
y
p
r
o
p
o
s
ed
to
im
p
r
o
v
e
s
ec
u
r
it
y
u
s
i
n
g
P
R
NG
b
ased
o
n
s
tr
ea
m
cip
h
er
.
B
u
t
t
h
e
p
r
o
p
o
s
ed
m
o
d
el
co
u
ld
n
o
t w
it
h
s
ta
n
d
attac
k
s
an
d
f
ailed
to
cip
h
er
t
ex
t
o
n
l
y
a
ttack
th
a
t
w
a
s
u
s
in
g
t
h
e
b
r
u
te
f
o
r
ce
m
et
h
o
d
to
cr
ac
k
esp
ec
iall
y
w
h
en
th
e
k
e
y
s
d
o
m
a
in
i
s
v
er
y
s
m
all
.
C
h
o
s
e
n
p
lain
te
x
t
attac
k
is
al
s
o
p
o
s
s
ib
le
an
d
ch
o
s
en
cip
h
er
tex
t
attac
k
ca
n
b
e
s
u
c
ce
s
s
f
u
ll
y
ac
co
m
p
li
s
h
ed
u
n
d
er
ce
r
tain
cir
cu
m
s
ta
n
ce
s
[
9
]
.
T
h
u
s
,
th
e
p
r
o
p
o
s
ed
m
o
d
el
d
o
es
n
o
t
h
av
e
en
o
u
g
h
e
f
f
icien
c
y
to
s
er
v
e
its
p
u
r
p
o
s
e.
T
o
o
v
er
co
m
e
all
th
e
s
e
s
h
o
r
tco
m
in
g
s
,
it
is
b
etter
to
s
w
i
tch
to
T
r
u
e
R
an
d
o
m
Nu
m
b
er
Ge
n
er
ato
r
s
w
h
ic
h
u
s
e
s
r
eso
u
r
ce
s
,
eith
er
n
at
u
r
al
o
r
h
ar
d
w
ar
e,
lik
e
te
m
p
er
atu
r
e,
n
o
is
e
o
r
k
e
y
s
tr
o
k
e
s
.
E.
M
.
M
.
M
a
n
u
c
o
m
,
B.
D.
G
e
r
a
rd
o
a
n
d
R.
P
.
M
e
d
in
a
[
1
0
]
f
r
o
m
th
e
P
h
ilip
p
in
es
h
av
e
s
u
g
g
e
s
ted
a
w
a
y
to
i
m
p
r
o
v
e
t
h
e
r
an
d
o
m
n
e
s
s
to
g
en
er
ate
k
e
y
s
f
o
r
On
e
T
im
e
P
ad
an
d
test
ed
th
e
m
f
o
r
v
ar
io
u
s
f
r
eq
u
en
c
y
tes
t
s
,
m
o
n
o
b
it
test
s
,
w
it
h
i
n
a
b
l
o
ck
test
an
d
r
u
n
test
.
T
h
ey
s
t
u
d
ied
an
d
a
n
al
y
ze
d
t
h
e
w
o
r
k
o
f
E
as
tto
m
,
w
h
er
e
th
e
a
u
t
h
o
r
h
as
an
al
y
ze
d
a
n
d
s
tated
t
h
e
L
eh
m
er
alg
o
r
ith
m
,
a
lin
ea
r
co
n
g
r
u
e
n
t
ial
g
en
er
ato
r
(
L
C
G)
w
h
ic
h
g
en
er
ates
a
p
s
eu
d
o
r
an
d
o
m
n
u
m
b
er
a
n
d
u
s
es
t
h
e
f
o
llo
w
in
g
f
o
r
m
u
la,
X
t+
1
=
(
(
c+X
t
*
a)
m
o
d
n
)
,
w
h
er
e
n
is
a
p
r
im
e
n
u
m
b
er
.
An
o
th
er
w
ell
-
k
n
o
w
n
alg
o
r
it
h
m
f
o
r
g
e
n
er
atin
g
P
R
NG
th
a
t
u
tili
ze
s
th
e
m
id
d
le
s
q
u
ar
e
alg
o
r
ith
m
h
as
s
o
m
e
m
o
r
e
li
m
itatio
n
s
.
Fo
r
e
m
o
s
t,
th
e
s
ee
d
v
al
u
e
o
f
t
h
is
a
lg
o
r
ith
m
is
ze
r
o
,
w
h
ich
r
ed
u
ce
s
th
e
s
u
cc
ee
d
i
n
g
k
e
y
v
alu
e
s
to
ze
r
o
.
P
er
io
d
icity
o
f
s
o
m
e
s
ee
d
v
al
u
es
i
s
v
er
y
s
m
all
i.e
.
s
h
o
r
ter
c
y
c
les
w
i
th
f
r
eq
u
e
n
t
r
ep
etitio
n
s
.
L
ater
,
a
tr
u
e
r
an
d
o
m
g
en
er
ato
r
u
s
in
g
m
o
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ates
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ip
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,
p
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x
t
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cip
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tex
t
[
1
1
]
.
Su
ch
T
r
u
e
R
an
d
o
m
N
u
m
b
er
g
en
er
a
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ar
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n
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id
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if
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ic
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lt
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o
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ac
tical
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p
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to
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v
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y
i
m
p
r
ac
tical
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d
o
v
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h
ea
d
[
1
2
]
.
T
h
is
r
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ch
w
o
r
k
tr
ies
to
co
m
e
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p
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Da
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p
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V,
MP
3
,
W
A
V,
J
P
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G,
an
d
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s
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tify
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l
ater
b
e
u
s
ed
in
s
es
s
io
n
k
e
y
g
en
er
atio
n
[
1
3
]
.
T
h
e
au
th
o
r
s
h
av
e
p
er
f
o
r
m
ed
a
C
p
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th
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ir
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t
p
ar
t
o
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th
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r
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d
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m
n
u
m
b
er
s
eq
u
e
n
ce
test
p
r
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g
r
a
m
.
An
d
th
e
ad
d
itio
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al
test
s
cr
ip
ts
w
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e
g
e
n
er
ated
to
p
r
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s
s
th
e
test
s
at
a
f
aster
p
ac
e.
T
h
e
m
ain
p
u
r
p
o
s
e
w
a
s
to
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en
tify
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e
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d
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m
n
es
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d
if
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t
m
ed
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f
ile
s
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as to
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u
tili
ze
d
f
o
r
th
e
en
c
r
y
p
tio
n
k
e
y
s
[
1
4
]
.
T
h
er
e
h
av
e
b
ee
n
o
th
er
p
r
o
p
o
s
als,
u
tili
zi
n
g
th
e
b
io
m
etr
ic
p
r
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p
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ties
s
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ch
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s
ca
n
,
f
ac
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,
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an
d
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n
f
o
r
r
an
d
o
m
n
u
m
b
er
g
en
er
atio
n
[
1
5
]
.
B
u
t
o
n
e
o
f
th
e
m
aj
o
r
co
n
ce
r
n
s
f
o
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u
s
in
g
t
h
ese
tech
n
iq
u
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is
it
s
lar
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er
p
r
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s
s
in
g
ti
m
e
t
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at
d
ela
y
s
th
e
e
n
cr
y
p
tio
n
p
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ce
s
s
.
T
h
er
ef
o
r
e,
th
e
r
an
d
o
m
n
ess
f
o
r
m
ed
i
a
f
iles
w
as
in
v
est
ig
ated
t
h
o
r
o
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g
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l
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s
o
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a
t
it
i
s
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s
ed
f
o
r
t
h
e
en
cr
y
p
tio
n
.
T
r
u
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R
an
d
o
m
Nu
m
b
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Ge
n
er
ato
r
s
(
T
R
NGs)
u
s
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s
an
en
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g
y
s
o
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co
m
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ctio
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er
at
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m
n
u
m
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.
T
R
NG
s
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ca
n
v
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m
co
m
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An
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s
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Fo
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m
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T
R
NG
f
o
r
k
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t
h
e
m
ed
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w
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test
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to
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s
s
th
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E
n
tr
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p
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test
to
m
ea
s
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r
e
r
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d
o
m
n
e
s
s
,
Ser
ia
l
co
r
r
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test
to
ch
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k
r
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s
b
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w
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v
ar
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les
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d
if
f
er
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t
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n
ter
v
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f
ti
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e,
A
r
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h
m
etic
m
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test
a
n
d
L
e
m
p
e
l
-
Z
i
v
co
m
p
r
ess
io
n
test
[
1
6
]
.
T
h
e
r
esp
ec
tiv
e
test
r
esu
lt
s
in
d
icate
d
th
at
t
h
e
Yo
u
T
u
b
e
v
id
eo
s
ex
tr
ac
ted
in
th
e
f
o
r
m
o
f
F
L
V
f
o
r
m
at
g
e
n
e
r
ate
th
e
h
ig
h
est
r
an
d
o
m
n
e
s
s
w
h
ic
h
is
clo
s
el
y
f
o
llo
w
ed
b
y
MP
3
an
d
J
P
E
G
f
ile
t
y
p
es
[
1
7
]
.
W
i
th
r
esp
ec
t
to
th
e
r
esear
ch
w
o
r
ld
ca
r
r
ied
o
u
t
b
y
v
ar
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u
s
au
t
h
o
r
s
,
it
is
o
b
s
er
v
ed
th
at
t
h
e
s
e
f
ile
t
y
p
es
ar
e
th
e
b
est
ca
n
d
id
ate
to
b
e
co
n
s
id
er
ed
f
o
r
g
e
n
er
ati
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g
r
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d
o
m
n
u
m
b
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s
a
n
d
ca
n
t
h
er
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f
o
r
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b
e
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s
ed
f
o
r
cr
ea
ti
n
g
cr
y
p
to
g
r
ap
h
ic
en
cr
y
p
tio
n
k
e
y
s
.
P
s
eu
d
o
R
an
d
o
m
N
u
m
b
er
Ge
n
e
r
ato
r
s
(
P
R
NG)
h
av
e
t
h
eir
p
r
o
s
an
d
co
n
s
j
u
s
t
lik
e
T
r
u
e
R
a
n
d
o
m
N
u
m
b
er
g
en
er
ato
r
s
(
T
R
NG)
.
B
y
co
m
p
ar
in
g
b
o
t
h
o
f
t
h
e
s
e
r
an
d
o
m
n
u
m
b
er
g
en
er
ato
r
s
,
i
n
s
ig
h
t
s
o
n
th
eir
s
tr
en
g
t
h
s
ar
e
p
r
o
v
id
ed
in
th
e
ap
p
licatio
n
p
er
s
p
ec
tiv
e.
P
s
eu
d
o
-
R
NG
'
s
e
x
ec
u
tio
n
d
o
es
n
o
t
p
r
o
ce
ed
in
an
ex
p
ec
ted
m
a
n
n
er
w
h
e
n
r
an
d
o
m
ized
ev
en
t
s
s
u
c
h
as r
o
u
lette
w
h
ee
l,
lo
tter
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n
u
m
b
er
ex
tr
ac
tio
n
o
r
a
s
im
p
le
d
ice
r
o
ll a
r
e
co
n
s
id
er
ed
[
1
8
]
.
T
h
e
ter
m
"
p
s
eu
d
o
"
in
a
P
R
NG
ca
n
g
iv
e
a
ce
r
tai
n
d
eg
r
ee
o
f
v
i
s
ib
ilit
y
w
h
en
w
e
co
m
p
ar
e
it
w
it
h
T
R
NG.
Si
m
i
lar
to
t
h
e
lo
g
ical
o
r
b
in
ar
y
i
n
s
tr
u
ctio
n
s
f
o
r
a
p
r
o
ce
s
s
o
r
,
P
R
NG'
s
ar
e
r
ec
o
g
n
ized
as
alg
o
r
ith
m
s
t
h
at
m
a
k
e
u
s
e
o
f
v
ar
io
u
s
m
at
h
e
m
at
ical
co
n
ce
p
ts
an
d
f
o
r
m
u
lae
to
g
e
n
e
r
ate
a
s
er
ies
o
f
n
u
m
b
er
s
.
T
h
e
g
en
er
ated
s
er
ies
o
f
n
u
m
b
er
s
p
r
o
v
id
es
t
h
e
il
lu
s
io
n
o
f
b
ein
g
co
m
p
letel
y
r
a
n
d
o
m
iz
ed
[
1
9
]
.
Du
e
to
ex
te
n
s
iv
e
y
ea
r
s
o
f
r
esear
c
h
b
ein
g
in
v
e
s
ted
in
d
e
v
elo
p
in
g
an
d
i
m
p
r
o
v
is
in
g
v
ar
io
u
s
P
R
NG
al
g
o
r
ith
m
s
,
p
r
o
g
r
a
m
s
th
a
t d
ep
lo
y
t
h
ese
alg
o
r
ith
m
s
ca
n
s
o
m
eti
m
es
r
ep
licate
t
h
e
tr
u
e
r
an
d
o
m
s
eq
u
en
ce
s
[
2
0
]
.
Ho
w
e
v
er
,
th
er
e
i
s
al
w
a
y
s
r
o
o
m
f
o
r
i
m
p
r
o
v
e
m
en
t
s
i
n
ce
th
ese
n
u
m
b
er
s
eq
u
e
n
ce
s
ar
e
n
ev
er
tr
u
l
y
in
r
a
n
d
o
m
n
at
u
r
e
.
A
d
etailed
co
m
p
ar
is
o
n
o
f
T
R
NG
an
d
P
R
NG
alg
o
r
ith
m
s
p
r
o
v
id
es
a
b
etter
in
s
ig
h
t
w
it
h
r
e
s
p
ec
t
to
its
co
m
p
ar
is
o
n
an
d
alg
o
r
it
h
m
e
f
f
ec
tiv
e
n
ess
.
Fo
r
ex
a
m
p
le,
w
h
e
n
th
e
o
u
tco
m
e
o
f
P
R
NG
al
g
o
r
ith
m
s
p
r
o
v
id
es
th
e
r
esu
lt
o
f
d
ice
r
o
lls
in
n
u
m
b
er
s
,
at
f
ir
s
t
g
la
n
ce
th
e
s
e
r
es
u
lts
m
ig
h
t
ap
p
ea
r
r
an
d
o
m
[
2
1
]
.
Ho
w
ev
er
,
th
e
s
tatis
t
ical
an
al
y
s
is
o
f
th
o
s
e
r
es
u
lt
s
p
r
o
v
id
ed
en
o
u
g
h
ev
id
e
n
ce
th
a
t
th
e
s
e
r
an
d
o
m
ized
n
u
m
b
er
o
u
tco
m
es
ar
e
p
r
e
-
d
eter
m
i
n
ed
an
d
n
o
t
tr
u
l
y
r
an
d
o
m
.
T
h
i
s
p
r
o
v
es
th
e
f
ac
t
t
h
at
t
h
e
o
u
tco
m
es
o
f
th
e
s
e
alg
o
r
it
h
m
s
ca
n
ea
s
il
y
b
e
p
r
ed
icted
,
co
n
tr
o
lled
,
s
tan
d
ar
d
ized
an
d
m
ea
s
u
r
ed
[
2
2
]
.
T
R
NG
o
n
th
e
o
th
er
h
a
n
d
s
h
o
w
s
co
m
p
letel
y
d
if
f
er
e
n
t
b
eh
a
v
io
u
r
d
u
e
to
th
e
f
ac
t
t
h
at
it
s
r
es
u
lt
s
ar
e
u
n
p
r
ed
ictab
le
an
d
co
m
p
l
etel
y
r
a
n
d
o
m
ized
.
I
f
o
n
e’
s
e
x
p
ec
tatio
n
is
th
at
a
p
er
s
o
n
al
co
m
p
u
ter
s
h
o
u
ld
b
e
ab
le
to
g
en
er
ate
a
r
an
d
o
m
ized
n
u
m
b
er
s
er
ies
th
e
n
t
h
e
co
m
p
u
ter
h
as
to
r
el
y
o
n
ev
en
t
s
th
at
o
cc
u
r
in
p
h
y
s
ical
n
atu
r
e
o
r
n
atu
r
al
p
h
en
o
m
en
o
n
[
2
3
]
.
T
h
is
m
i
g
h
t
i
n
clu
d
e
th
e
en
tr
o
p
y
o
f
v
ar
io
u
s
r
ad
io
a
ctiv
e
is
o
to
p
es,
n
at
u
r
all
y
o
cc
u
r
r
in
g
a
u
d
io
an
d
v
id
eo
d
is
tu
r
b
an
ce
s
in
t
h
e
e
n
v
ir
o
n
m
e
n
t
o
r
th
e
w
av
e
p
atter
n
o
f
a
w
ater
b
o
d
y
s
u
c
h
as
o
ce
an
ic
w
av
e
s
[
2
4
]
.
T
h
er
e
is
o
n
e
m
i
n
o
r
is
s
u
e
w
it
h
th
e
co
s
t
ef
f
icie
n
c
y
o
f
T
R
NG
w
h
e
n
co
m
p
ar
ed
w
it
h
P
R
NG
b
ec
au
s
e
th
e
i
n
p
u
t
d
ev
ice
s
ar
e
s
u
b
j
ec
ted
to
p
h
y
s
ical
d
eter
io
r
atio
n
d
u
e
to
w
ea
r
an
d
tear
w
h
ic
h
is
n
o
t
n
o
ticed
in
P
R
N
Gs
[
1
0
]
,
[
2
5
]
.
C
o
n
s
eq
u
e
n
tl
y
,
t
h
e
r
esear
ch
w
o
r
k
t
h
at
is
ca
r
r
ied
o
u
t
ai
m
s
to
p
r
o
v
e
th
at
w
it
h
c
u
r
r
en
t
tec
h
n
o
lo
g
i
ca
l
in
f
r
astru
c
tu
r
e
a
v
ailab
le
o
n
a
p
er
s
o
n
al
co
m
p
u
ter
(
P
C
)
,
T
R
NG
ca
n
b
e
i
m
p
le
m
en
ted
i
n
r
ea
l lif
e
s
y
s
te
m
s
s
u
c
h
as c
o
n
f
er
en
c
in
g
s
o
l
u
ti
o
n
s
,
au
d
io
ca
ll,
VOI
P
ca
ll a
n
d
s
o
o
n
.
2.
P
RO
P
O
SE
D
M
E
T
H
O
DO
L
O
G
Y
B
y
co
n
s
id
er
in
g
t
h
e
ex
is
t
in
g
w
o
r
k
as
a
b
aselin
e,
th
e
liv
e
au
d
io
r
ec
o
r
d
in
g
o
f
th
e
s
en
d
er
is
u
tili
ze
d
to
g
en
er
ate
t
h
e
r
esp
ec
ti
v
e
MP
3
au
d
io
f
ile,
w
h
ic
h
is
t
h
e
n
co
n
v
er
ted
i
n
to
B
as
e
6
4
f
o
r
m
at.
Su
b
s
eq
u
e
n
tl
y
,
t
h
e
ch
ar
ac
ter
s
in
th
e
B
ase
6
4
tex
t
f
ile
ar
e
ex
tr
ac
ted
an
d
s
to
r
ed
in
an
in
teg
er
ar
r
ay
w
h
ich
is
m
ix
ed
w
i
th
th
e
m
o
d
u
lo
in
te
g
er
v
al
u
e
o
f
th
e
c
u
r
r
en
t
s
y
s
te
m
d
ate
an
d
ti
m
e
to
f
u
r
t
h
er
r
an
d
o
m
ize
t
h
e
o
u
tp
u
t
k
e
y
.
T
h
e
f
in
al
o
u
tp
u
t
is
co
n
v
er
ted
to
a
B
in
ar
y
Stri
n
g
ar
r
ay
o
f
6
4
-
b
it
len
g
t
h
a
n
d
r
etu
r
n
ed
to
b
e
p
r
in
ted
o
n
th
e
co
n
s
o
le
w
in
d
o
w
.
T
h
e
b
asic
w
al
k
t
h
r
o
u
g
h
i
s
to
s
etu
p
an
d
s
y
n
th
e
s
ize
a
3
s
ec
o
n
d
s
au
d
io
s
es
s
io
n
w
h
er
eb
y
th
e
m
es
s
ag
e
s
en
d
er
is
ask
ed
to
s
p
ea
k
o
u
t a
k
e
y
w
o
r
d
to
a
m
icr
o
p
h
o
n
e
s
o
th
at
th
e
s
e
n
d
er
’
s
v
o
ice
is
ca
p
tu
r
ed
an
d
r
ec
o
r
d
e
d
in
to
a
m
p
3
f
ile
f
o
r
m
at.
T
h
e
r
esp
ec
tiv
e
r
ec
o
r
d
ed
m
p
3
f
ile
i
n
-
tu
r
n
is
co
n
v
er
ted
to
b
ase
6
4
f
o
r
m
at
w
h
ich
p
r
o
v
id
es
th
e
r
an
d
o
m
s
et
o
f
UT
F
-
1
6
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2722
-
3221
C
o
m
p
u
t.
Sci.
I
n
f
.
T
ec
h
n
o
l.
,
Vo
l.
2
,
No
.
2
,
J
u
l
y
20
2
1
:
8
7
–
9
4
90
ch
ar
ac
ter
s
.
Her
e,
e
v
en
th
o
u
g
h
th
e
th
r
ee
s
ec
o
n
d
a
u
d
io
co
s
t
y
o
u
in
ap
p
r
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x
i
m
atel
y
1
0
0
to
3
0
0
k
ilo
b
y
tes
o
f
d
ata
s
to
r
ag
e,
it
is
co
m
p
r
ess
ed
an
d
co
m
b
i
n
ed
w
ith
t
h
e
m
o
d
u
lo
i
n
teg
er
v
al
u
e
o
f
s
y
s
te
m
d
ata
a
n
d
tim
e
to
p
r
o
d
u
ce
a
64
-
b
it len
g
th
cr
y
p
to
g
r
ap
h
ic
k
e
y
.
3.
RE
S
E
ARCH
M
E
T
H
OD
3
.
1
.
Arc
hite
ct
ura
l dia
g
ra
m
Fig
u
r
e
1
s
h
o
w
ca
s
e
s
t
h
e
ar
c
h
it
ec
tu
r
al
d
ia
g
r
a
m
f
o
r
t
h
e
Au
d
io
R
ec
o
r
d
er
Ke
y
Ge
n
er
ato
r
p
r
o
g
r
a
m
.
T
h
e
p
r
o
g
r
am
s
tar
ts
w
it
h
th
e
i
n
itia
li
za
tio
n
o
f
clas
s
an
d
s
tatic
v
ar
iab
le
th
en
t
h
e
au
d
io
r
ec
o
r
d
er
lib
r
ar
ies
ar
e
in
itialized
.
P
o
s
t A
u
d
io
lin
e
s
u
p
p
o
r
t v
er
if
i
ca
tio
n
,
liv
e
au
d
io
r
ec
o
r
d
in
g
is
co
m
m
e
n
ce
d
an
d
th
e
au
d
io
p
ac
k
ets ar
e
w
r
itte
n
an
d
s
av
ed
in
w
a
v
f
o
r
m
at.
Af
ter
th
e
r
ec
o
r
d
in
g
is
co
n
clu
d
ed
,
th
en
t
h
e
w
a
v
f
ile
is
r
ea
d
in
to
a
b
y
te
ar
r
a
y
an
d
s
u
b
s
eq
u
en
t
l
y
e
n
co
d
ed
in
B
ase
6
4
f
o
r
m
a
t
w
h
ich
is
s
to
r
ed
in
a
t
ex
t
f
ile
lo
ca
ll
y
.
Fi
n
all
y
,
t
h
e
ch
ar
ac
ter
s
in
t
h
e
B
ase
6
4
tex
t
f
ile
ar
e
ex
tr
ac
ted
an
d
s
to
r
ed
in
an
in
teg
er
ar
r
a
y
w
h
i
ch
is
m
i
x
ed
w
i
th
t
h
e
m
o
d
u
lo
in
teg
er
v
a
lu
e
o
f
th
e
cu
r
r
en
t
s
y
s
te
m
d
ate
an
d
ti
m
e
to
f
u
r
th
er
r
an
d
o
m
ize
th
e
o
u
tp
u
t
k
e
y
.
T
h
e
f
in
al
o
u
tp
u
t
is
co
n
v
er
ted
to
a
B
in
ar
y
Strin
g
ar
r
a
y
o
f
6
4
-
b
it
len
g
t
h
a
n
d
r
etu
r
n
ed
to
b
e
p
r
in
ted
o
n
t
h
e
co
n
s
o
le
w
in
d
o
w
.
Si
n
ce
t
h
e
6
4
-
b
it
k
e
y
is
s
to
r
ed
in
a
v
ar
iab
le,
it
ca
n
b
e
u
s
ed
as
a
f
u
n
ctio
n
/
m
et
h
o
d
r
etu
r
n
v
alu
e
to
b
e
u
tili
ze
d
as
an
in
p
u
t
k
e
y
v
al
u
e
i
n
an
y
cr
y
p
to
g
r
ap
h
ic
s
y
m
m
e
tr
ic
k
e
y
alg
o
r
ith
m
s
u
c
h
as
A
E
S
-
2
5
6
,
3
DE
S,
OT
P,
etc.
A
u
d
io
R
ec
o
r
d
in
g
s
i
n
g
e
n
er
al
ar
e
ca
p
ab
le
en
o
u
g
h
to
p
r
o
d
u
ce
tr
u
ly
r
a
n
d
o
m
n
u
m
b
er
s
.
Ho
w
e
v
er
,
w
e
h
av
e
tr
ied
to
co
n
s
id
er
a
s
p
ec
ial
u
s
e
ca
s
e
w
h
er
e
a
u
s
er
e
n
d
s
u
p
w
it
h
a
li
v
e
r
ec
o
r
d
in
g
w
it
h
o
u
t
ac
tu
al
l
y
s
p
ea
k
in
g
(
m
a
y
o
cc
u
r
i
f
t
h
e
u
s
er
u
s
es
a
h
ea
d
s
e
t
w
it
h
a
f
au
lt
y
m
ic)
,
w
h
ic
h
w
o
u
ld
r
es
u
lt in
a
s
tatic
a
u
d
io
r
ec
o
r
d
in
g
.
T
o
ac
co
m
m
o
d
ate
t
h
is
s
ce
n
ar
io
,
th
e
m
o
d
u
lo
in
te
g
er
v
alu
e
o
f
th
e
c
u
r
r
en
t s
y
s
te
m
d
a
te
an
d
ti
m
e
i
s
u
t
ilized
to
f
u
r
t
h
e
r
r
an
d
o
m
ize
t
h
e
p
r
o
g
r
a
m
o
u
tp
u
t.
Fig
u
r
e
1
.
A
r
ch
itectu
r
al
f
lo
w
d
i
ag
r
a
m
3
.
1
.
I
m
ple
m
ent
a
t
io
n
T
h
is
s
ec
tio
n
p
r
o
v
id
es
d
etail
s
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o
u
t
th
e
i
m
p
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m
en
ta
tio
n
o
f
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Au
d
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R
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Key
Gen
e
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r
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J
av
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1
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2
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er
s
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n
.
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h
e
o
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tp
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t
o
f
t
h
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p
r
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r
a
m
g
e
n
er
ates
a
6
4
-
b
it
b
in
ar
y
k
e
y
t
h
at
is
u
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f
o
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e
m
a
n
a
g
e
m
en
t
an
d
tr
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s
p
o
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y
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s
y
m
m
etr
ic
k
e
y
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g
o
r
it
h
m
s
.
Sin
ce
th
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6
4
-
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it
k
e
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s
cr
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ted
u
s
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e
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r
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ate
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e,
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h
e
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a
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v
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tal
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o
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n
d
s
,
t
h
e
o
u
tp
u
t
p
r
o
v
id
es
a
Evaluation Warning : The document was created with Spire.PDF for Python.
C
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p
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Sci.
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n
f
.
T
ec
h
n
o
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Desig
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R
an
d
o
m
N
u
m
b
er
as
an
e
n
cr
y
p
tio
n
k
e
y
.
T
h
i
s
k
e
y
ca
n
b
e
u
s
ed
in
a
n
y
s
y
m
m
e
tr
ic
k
e
y
e
n
cr
y
p
tio
n
alg
o
r
ith
m
s
u
c
h
a
s
A
E
S,
DE
S,
R
C
4
,
B
lo
w
f
i
s
h
,
etc.
F
u
r
th
er
m
o
r
e,
to
f
o
r
tify
t
h
e
r
an
d
o
m
n
e
s
s
o
f
th
e
k
e
y
,
th
e
cu
r
r
e
n
t
s
y
s
te
m
d
ate
a
n
d
ti
m
e
i
s
in
cl
u
d
ed
in
th
e
k
e
y
.
3
.
2
.
Alg
o
rit
h
m
T
h
e
f
o
llo
w
in
g
alg
o
r
it
h
m
ic
f
l
o
w
w
o
u
ld
p
r
o
v
id
e
a
w
a
lk
t
h
r
o
u
g
h
o
f
th
e
Secu
r
ed
A
u
d
io
B
ased
Key
Gen
er
ato
r
.
A
l
g
o
r
ith
m
:
Secu
r
ed
A
u
d
io
B
ased
Ke
y
Gen
er
ato
r
1.
Star
t
2.
I
n
itialize
a
n
d
d
ec
lar
e:
class
,
s
t
atic
v
ar
iab
les
3.
I
n
itialize:
Au
d
io
r
ec
o
r
d
er
lib
r
a
r
ies,
tar
g
et
d
ata
4.
R
ec
→
A
u
d
(
3
s
ec
)
;
5.
C
ap
_
Au
d
=
Au
d
(
.
w
a
v
f
o
r
m
at
)
;
6.
Sto
p
R
ec
7.
I
n
itialize:
B
y
t_
A
r
y
(
B
y
te
A
r
r
ay
s
)
8.
R
ea
d
C
ap
_
Au
d
→
B
y
t_
A
r
y
;
9.
E
n
co
d
e
B
y
t_
A
r
y
→
B
ase6
4
;
10.
T
x
t =
B
ase6
4
;
11.
I
n
itialize:
Strin
g
,
I
n
t_
A
r
y
(
i
n
t
ar
r
ay
)
12.
R
ea
d
T
x
t;
13.
T
x
t_
C
n
t =
T
x
t (
t
y
p
e
ca
s
ted
in
to
I
n
t_
A
r
y
)
;
14.
R
ea
d
C
SD=
C
o
m
I
n
tVal_
C
r
n
t_
S
y
s
Date
;
15.
R
ea
d
C
ST
=Co
m
p
I
n
tVa
l_
C
r
n
t
_
S
y
s
T
i
m
e;
16.
Me
r
g
e
Me
r
=CS
D,
C
ST
,
T
x
t_
C
n
t
;
17.
C
o
m
p
r
ess
Me
r
→
6
4
-
b
it b
in
ar
y
s
tr
i
n
g
ar
r
a
y
;
18.
R
etu
r
n
→
6
4
-
b
it k
e
y
;
19.
P
r
in
t →
C
o
n
s
o
le
w
i
n
d
o
w
;
20.
Sto
p
T
h
e
o
v
er
all
p
r
o
g
r
am
is
d
i
v
id
e
d
in
to
th
e
f
o
llo
w
i
n
g
f
u
n
ctio
n
s
,
ex
h
ib
ited
i
n
Fig
u
r
e
2
Star
tR
ec
o
r
d
in
g
–
R
esp
o
n
s
ib
le
f
o
r
ca
p
tu
r
in
g
th
e
u
s
er
’
s
a
u
d
io
p
ac
k
et
f
o
r
3
s
ec
o
n
d
s
.
Fin
i
s
h
R
ec
o
r
d
in
g
–
C
o
n
cl
u
d
es
th
e
r
ec
o
r
d
in
g
s
e
s
s
io
n
af
ter
3
s
ec
o
n
d
s
.
W
av
T
o
B
ase6
4
–
R
esp
o
n
s
ib
le
f
o
r
co
n
v
er
ti
n
g
w
a
v
f
ile
to
B
ase
6
4
tex
t f
ile.
Ke
y
Ge
n
–
R
esp
o
n
s
ib
le
f
o
r
g
en
er
atin
g
th
e
6
4
-
b
it
k
e
y
f
r
o
m
B
ase
6
4
tex
t
f
ile
an
d
th
e
cu
r
r
en
t
s
y
s
te
m
d
ate
an
d
ti
m
e.
M
o
d
u
lo
2
5
5
–
R
esp
o
n
s
ib
le
f
o
r
r
etu
r
n
i
n
g
t
h
e
m
o
d
u
l
u
s
2
5
5
in
t
eg
er
v
al
u
e
w
h
ich
i
s
also
les
s
t
h
an
2
5
5
.
Fig
u
r
e
2
.
C
lass
m
et
h
o
d
s
n
ip
p
e
t o
f
au
d
io
r
ec
o
r
d
er
k
ey
g
e
n
er
a
to
r
p
r
o
g
r
am
4.
RE
SU
L
T
S
AND
D
I
SCU
SS
I
O
N
Ou
r
lig
h
t
w
ei
g
h
t
p
r
o
g
r
a
m
is
ca
p
ab
le
o
f
u
s
in
g
th
e
cu
r
r
en
t
lap
t
o
p
s
o
r
P
C
s
h
ar
d
w
ar
e
to
g
en
er
ate
a
T
r
u
e
R
an
d
o
m
N
u
m
b
er
(
T
R
NG)
k
e
y
u
s
i
n
g
li
v
e
au
d
io
r
ec
o
r
d
in
g
s
wh
ich
i
s
f
u
r
th
er
r
an
d
o
m
ized
u
s
i
n
g
s
y
s
te
m
d
ate
an
d
ti
m
e.
T
h
ese
T
R
Ns
ca
n
b
e
u
s
ed
to
r
ep
lace
th
e
d
eter
m
i
n
is
tic
p
s
eu
d
o
r
an
d
o
m
n
u
m
b
er
cr
y
p
to
g
r
ap
h
ic
k
e
y
s
t
h
at
ar
e
p
r
esen
tl
y
u
s
ed
b
y
i
n
d
u
s
tr
ies
f
o
r
s
y
m
m
etr
ic
k
e
y
e
n
cr
y
p
tio
n
alg
o
r
ith
m
s
w
h
ich
d
e
v
o
lv
e
s
t
h
e
alg
o
r
ith
m
to
b
ein
g
co
n
d
itio
n
all
y
s
ec
u
r
ed
(
c
ip
h
er
tex
t
ca
n
b
e
d
ec
r
y
p
ted
to
p
lain
tex
t
w
it
h
o
u
t
k
e
y
k
n
o
w
led
g
e
o
v
er
a
lo
n
g
d
u
r
atio
n
o
f
ti
m
e,
th
a
t c
an
b
e
m
o
r
e
th
an
th
e
m
e
s
s
a
g
e
’
s
ti
m
e
to
liv
e)
.
Usi
n
g
th
e
a
u
d
io
b
ased
T
R
NG
k
e
y
w
o
u
ld
r
en
d
er
th
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
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o
m
p
u
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Sci.
I
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f
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T
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o
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,
Vo
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J
u
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:
8
7
–
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4
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s
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cr
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ith
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w
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h
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a
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p
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u
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u
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p
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h
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o
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d
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w
it
h
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u
t
ac
t
u
all
y
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p
ea
k
in
g
(
m
a
y
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cc
u
r
if
th
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u
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a
h
ea
d
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et
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h
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f
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p
r
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u
tio
n
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th
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g
h
t
w
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h
t
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d
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ased
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Key
Ge
n
er
ato
r
p
r
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g
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am
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p
r
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f
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f
co
n
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t
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ted
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s
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A
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1
3
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o
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ce
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o
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ized
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4
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it
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ase
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ated
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u
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d
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r
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ab
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1
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T
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c
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[3
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.
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tern
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[4
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,
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.
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se
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[5
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S
,
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v
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[6
]
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a
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,
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[7
]
A
.
K.
M
a
n
d
a
l
,
C.
P
a
ra
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sh
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d
A
.
T
i
w
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ri,
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P
e
rf
o
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m
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v
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lu
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s:
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'
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H.
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R.
,
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0
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2
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3
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D.
O
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N.
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.
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4
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Om
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N.
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Pr
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5
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L
.
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ll
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,
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.
Ka
m
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M
.
K.
Re
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6
]
J.
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d
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.
L
e
m
p
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l,
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A
u
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7
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.
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.
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M
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,
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8
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A
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.
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o
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p
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.
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9
]
V
.
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k
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d
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r,
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En
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ry
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