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r
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p
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d
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[
1
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,
[
2
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.
F
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a
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A
s
ch
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w
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f
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.
Ko
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l
.
[
1
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p
r
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a
p
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ab
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p
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Evaluation Warning : The document was created with Spire.PDF for Python.
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6930
T
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KOM
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C
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p
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C
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tr
o
l
,
Vo
l.
23
,
No
.
4
,
A
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s
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20
25
:
1
0
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7
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11
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1098
attestatio
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.
T
h
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en
h
an
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d
s
ch
e
m
e
p
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m
o
tes
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w
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u
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th
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p
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p
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A
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s
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l
.
[
2
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p
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f
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f
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ab
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(
P
OR
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p
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T
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m
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p
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[
3
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is
also
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ter
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lar
g
e
s
ca
le
[
4
]
–
[
8
]
h
av
e
b
ee
n
d
ev
elo
p
ed
t
o
s
u
p
p
o
r
t
th
e
p
r
i
v
ac
y
p
r
i
n
ci
p
le
th
r
o
u
g
h
o
u
t
t
h
e
in
te
g
r
it
y
c
h
ec
k
,
s
o
m
e
s
y
s
te
m
s
[
4
]
–
[
6
]
d
o
n
o
t
j
u
s
t
p
r
ev
en
t
d
a
ta
leak
s
r
at
h
er
t
h
an
e
n
s
u
r
e
s
tr
i
ct
p
r
iv
ac
y
a
n
d
[
4
]
,
[
6
]
h
as
p
r
o
v
id
ed
tech
n
iq
u
e
s
t
h
at
w
o
r
k
w
e
ll
f
o
r
en
s
u
r
i
n
g
t
h
e
m
a
x
i
m
u
m
p
r
o
tectio
n
o
f
d
ata
r
eg
ar
d
in
g
t
h
eir
s
ec
u
r
it
y
m
o
d
els.
T
h
e
s
tu
d
y
in
tr
o
d
u
ce
s
a
s
ec
u
r
e
an
d
e
f
f
ic
ien
t
s
y
s
te
m
f
o
r
d
a
ta
au
d
iti
n
g
i
n
clo
u
d
s
to
r
ag
e
as
p
er
th
e
B
o
n
eh
-
L
y
n
n
-
S
h
ac
h
a
m
(
B
L
S)
s
ig
n
at
u
r
e
an
d
p
r
eser
v
i
n
g
d
ata
p
r
iv
ac
y
w
it
h
o
u
t
an
y
ad
d
itio
n
a
l
co
n
s
tr
ai
n
ts
f
o
r
th
e
u
s
er
s
o
f
t
h
e
clo
u
d
an
d
w
it
h
o
u
t
f
u
l
l
d
ata
r
e
co
v
er
y
al
s
o
in
li
n
e
w
it
h
th
ir
d
-
p
ar
t
y
au
d
it
s
(
T
PA
)
to
ch
ec
k
w
h
et
h
er
th
e
d
ata
is
tr
u
e
an
d
r
eliab
l
e.
T
h
e
s
y
s
te
m
a
ls
o
i
m
p
r
o
v
es
d
y
n
a
m
ic
d
ata
o
f
d
eletio
n
s
,
in
s
er
tio
n
s
,
an
d
m
o
d
i
f
icat
io
n
s
.
T
h
e
s
y
s
te
m
s
a
n
al
y
s
i
s
p
r
o
v
es t
h
at
it is
s
ec
u
r
e
a
n
d
ef
f
icie
n
t
.
I
n
s
u
m
m
ar
y
,
th
e
co
n
tr
ib
u
tio
n
i
s
:
−
Usi
n
g
t
h
e
s
p
litt
in
g
al
g
o
r
ith
m
an
d
th
e
ad
v
a
n
ce
d
en
cr
y
p
tio
n
s
ta
n
d
ar
d
(A
ES
)
en
cr
y
p
tio
n
alg
o
r
ith
m
,
th
e
s
u
g
g
e
s
ted
s
y
s
te
m
e
n
s
u
r
es d
ata
s
ec
r
ec
y
in
clo
u
d
s
to
r
ag
e
s
er
v
i
ce
s
.
−
T
h
is
s
tu
d
y
r
ef
o
r
m
u
lated
th
e
p
u
b
lic
k
e
y
eq
u
atio
n
as
w
ell
as
th
e
s
ig
n
a
tu
r
e
eq
u
atio
n
t
o
in
cr
ea
s
e
th
e
co
m
p
le
x
it
y
w
h
ile
m
ai
n
tai
n
i
n
g
a
h
ig
h
s
p
ee
d
o
f
e
x
ec
u
tio
n
.
Mo
r
eo
v
er
,
th
e
p
r
o
p
o
s
ed
s
y
s
t
e
m
s
u
p
p
o
r
ts
a
d
y
n
a
m
ic
d
ata
p
r
o
ce
s
s
in
ter
m
s
o
f
m
o
d
if
icat
io
n
,
d
eletio
n
a
n
d
ad
d
itio
n
.
−
T
h
e
s
y
s
te
m
’
s
e
f
f
ic
ien
c
y
h
as
also
b
ee
n
d
e
m
o
n
s
tr
ated
th
r
o
u
g
h
p
er
f
o
r
m
a
n
ce
a
n
al
y
s
is
an
d
co
m
p
ar
is
o
n
s
w
it
h
s
i
m
ilar
s
y
s
te
m
s
.
T
h
e
s
u
g
g
ested
s
y
s
te
m
’
s
co
m
m
u
n
icatio
n
o
v
er
h
ea
d
is
O(
n
)
.
Oth
er
p
ar
ts
o
f
th
i
s
w
o
r
k
is
s
t
r
u
ctu
r
ed
as
f
o
llo
w
s
:
s
ec
tio
n
2
d
is
cu
s
s
e
s
r
elev
a
n
t
w
o
r
k
an
d
i
m
p
o
r
tan
t
p
r
o
b
lem
s
.
Sectio
n
3
g
i
v
es
p
r
eli
m
i
n
ar
ies
an
d
s
y
m
b
o
ls
.
I
n
s
e
ctio
n
4
,
th
e
s
y
s
te
m
m
o
d
el
a
n
d
s
ec
u
r
it
y
ai
m
s
ar
e
d
is
cu
s
s
ed
.
Sectio
n
5
ev
al
u
ate
s
th
e
p
er
f
o
r
m
a
n
ce
o
v
er
h
ea
d
o
f
o
u
r
ap
p
r
o
ac
h
w
h
er
e
th
e
p
ap
er
is
co
n
cl
u
d
ed
in
s
ec
tio
n
6
.
2.
RE
L
AT
E
D
WO
RK
T
h
is
p
ap
er
d
is
cu
s
s
e
s
th
e
e
x
is
tin
g
s
ch
e
m
e
s
an
d
th
eir
s
h
o
r
t
co
m
in
g
s
,
i
n
th
e
s
u
b
s
eq
u
en
t
s
ec
tio
n
s
,
a
p
r
o
p
o
s
ed
m
et
h
o
d
w
ill
b
e
co
m
p
ar
ed
.
Ma
n
y
s
tr
ateg
ie
s
h
av
e
r
ec
en
tl
y
b
ee
n
d
ev
elo
p
in
g
to
p
r
o
v
id
e
s
ec
u
r
it
y
an
d
p
r
iv
ac
y
f
o
r
th
e
in
teg
r
atio
n
o
f
clo
u
d
d
ata.
T
h
er
e
is
a
s
c
h
e
m
e
w
h
ic
h
h
as
b
ee
n
g
i
v
en
in
r
ea
d
in
g
an
en
t
ir
e
f
i
le
to
ch
ec
k
t
h
e
s
o
u
n
d
n
es
s
an
d
th
e
n
d
er
iv
in
g
th
e
to
tal
ass
u
r
an
ce
le
v
el,
h
o
w
ev
er
lar
g
e
f
iles
ta
k
e
to
o
m
u
c
h
ti
m
e
to
b
e
v
er
if
ied
a
n
d
w
h
er
e
th
e
n
u
m
b
er
o
f
ti
m
es
u
s
er
m
a
y
ch
ec
k
t
h
e
s
o
u
n
d
n
ess
o
f
t
h
e
f
ile
a
s
it
is
n
o
t
s
en
t
b
y
p
ar
t
s
[9
]
-
[
11]
.
Oth
er
p
r
o
b
ab
ilis
tic
-
at
-
n
a
m
e
tec
h
n
iq
u
es
ta
k
e
r
an
d
o
m
l
y
s
elec
ted
b
lo
ck
s
o
f
d
ata
i
n
ass
u
r
in
g
in
te
g
r
it
y
an
d
d
o
n
o
t
ass
u
r
e
m
o
r
e
th
a
n
1
0
0
%
ass
u
r
an
ce
.
T
h
e
f
ir
s
t
p
r
o
b
ab
ilis
tic
m
o
d
el
w
as
d
escr
ib
ed
in
Ko
et
a
l
.
[
1
]
,
u
p
o
n
w
h
ic
h
p
r
esen
t
p
r
o
b
ab
ilis
tic
m
o
d
els
o
f
i
n
te
g
r
it
y
ch
ec
k
ar
e
b
ased
.
On
l
y
r
an
d
o
m
l
y
s
el
ec
ted
d
ata
p
ar
ts
ar
e
r
eq
u
ir
ed
f
o
r
ch
ec
k
in
g
i
n
te
g
r
it
y
an
d
p
r
o
v
id
in
g
9
9
% c
o
n
f
id
e
n
ce
.
Ho
w
e
v
er
,
as it
h
a
s
to
r
ec
alc
u
late
t
h
e
e
n
tire
f
ile
tag
s
ea
c
h
ti
m
e
s
o
m
e
n
e
w
d
ata
is
p
lace
d
in
a
p
iece
o
f
d
ata
th
at
w
a
s
th
er
e
b
ef
o
r
e
,
th
is
ap
p
r
o
ac
h
ca
n
o
n
l
y
w
o
r
k
w
it
h
s
tat
ic
d
ata.
T
h
e
w
o
r
k
d
ig
n
if
ied
th
e
d
y
n
a
m
ic
p
r
o
v
ab
le
d
ata
p
o
s
s
ess
io
n
m
o
d
el
an
d
p
r
esen
ts
th
e
f
ir
s
t
s
o
lu
tio
n
t
h
at
i
s
e
n
tire
l
y
d
y
n
a
m
ic
to
ac
h
ie
v
e
p
r
o
v
ab
le
en
h
an
ce
m
e
n
ts
o
f
d
ata
f
i
le
s
co
n
tai
n
ed
u
s
i
n
g
au
th
e
n
tica
ted
s
k
ip
li
s
ts
.
P
u
b
lic
au
d
it
s
y
s
te
m
s
e
n
ab
le
t
h
e
th
ir
d
p
ar
ty
au
d
it
d
ata
i
n
te
g
r
it
y
;
p
r
iv
ate
a
u
d
it
s
y
s
te
m
s
allo
w
o
n
l
y
t
h
e
o
w
n
er
to
au
d
it
d
ata
in
teg
r
it
y
p
r
i
v
ate
au
d
iti
n
g
o
u
tli
n
es
ar
e
u
s
ed
in
b
u
s
i
n
es
s
es
th
a
t
u
s
e
clo
u
d
s
er
v
ices,
p
ar
tic
u
lar
l
y
t
h
o
s
e
t
h
at
h
an
d
le
d
elica
te
i
n
f
o
r
m
ati
on
[
1
2
]
.
P
u
b
lic
au
d
itin
g
i
s
ap
p
lied
in
en
ter
p
r
is
es
w
h
er
e
lar
g
e
d
ata
b
ac
k
u
p
s
ar
e
n
ee
d
in
th
e
av
ailab
ilit
y
o
f
a
li
m
ited
r
eso
u
r
ce
ca
p
ac
ity
[
1
3
]
.
I
n
th
eir
w
o
r
k
,
A
te
n
ie
s
e
et
a
l
.
[
2
]
p
r
o
v
id
ed
a
m
ea
n
s
o
f
co
n
d
u
cti
n
g
p
r
iv
ate
a
u
d
itin
g
t
h
at
i
n
v
o
lv
e
s
a
m
ec
h
a
n
is
m
f
o
r
clo
u
d
d
ata
s
h
ar
i
n
g
ap
p
licab
le
to
m
o
b
ile
d
ev
ices.
B
ef
o
r
e
d
ata
is
s
h
ar
e
d
w
it
h
clie
n
ts
,
t
h
eir
s
y
s
te
m
s
ca
n
co
n
d
u
ct
s
o
m
e
s
ec
u
r
it
y
test
s
to
en
s
u
r
e
th
at
t
h
e
d
ata
is
ac
ce
s
s
ib
le.
T
h
is
tech
n
o
lo
g
y
e
n
ab
led
lig
h
t
m
o
b
ile
d
ev
ice
o
p
er
atio
n
s
f
o
r
th
e
d
ata
o
w
n
er
as
w
el
l
as
f
o
r
th
e
o
n
e
w
h
o
r
eq
u
ests
th
e
d
ata.
Ho
w
e
v
er
,
th
eir
s
y
s
te
m
d
o
es
n
o
t
s
u
p
p
o
r
t
d
y
n
a
m
ic
d
ata
o
p
er
atio
n
s
.
T
h
e
s
y
s
te
m
i
m
p
r
o
v
es
p
r
i
v
ate
a
u
d
itin
g
s
i
n
c
e
u
s
er
s
ar
e
allo
w
ed
to
co
n
d
u
ct
k
e
y
w
o
r
d
s
ea
r
ch
u
s
i
n
g
en
cr
y
p
ted
d
y
n
a
m
ic
clo
u
d
d
ata
w
i
th
a
v
alid
atio
n
o
f
s
y
m
m
etr
ic
k
e
y
.
T
h
e
y
f
o
r
m
ed
a
n
o
v
el
cu
m
u
lati
v
e
au
th
e
n
tica
tio
n
s
i
g
n
at
u
r
e
b
ase
d
o
n
s
y
m
m
etr
ic
-
k
e
y
cr
y
p
to
g
r
ap
h
y
f
o
r
b
u
ild
i
n
g
a
cu
m
u
la
tiv
e
a
u
t
h
en
ticatio
n
s
ig
n
at
u
r
e
f
o
r
a
s
in
g
le
k
e
y
w
o
r
d
.
Gu
o
et
a
l
.
[
1
4
]
p
r
o
v
id
ed
a
m
e
th
o
d
f
o
r
p
u
b
lic
au
d
iti
n
g
u
s
in
g
a
p
r
iv
ac
y
-
p
r
eser
v
in
g
ad
ap
tiv
e
tr
ap
d
o
o
r
h
ash
a
u
th
e
n
tica
tio
n
tr
ee
(
P
A
T
HA
T
)
th
r
o
u
g
h
a
u
th
e
n
tic
atin
g
th
e
d
ata
b
y
s
u
p
p
l
y
i
n
g
th
e
tr
ap
d
o
o
r
h
ash
an
d
B
L
S
s
i
g
n
at
u
r
e
to
th
e
Me
r
k
le
h
ash
tr
ee
[
1
5
]
.
A
lth
o
u
g
h
th
e
y
h
a
v
e
ca
lled
f
o
r
a
d
ata
ag
g
r
eg
a
tio
n
s
c
h
e
m
e
in
t
h
e
clo
u
d
d
ata
p
r
iv
ac
y
i
s
n
o
t
ac
h
iev
ed
[
1
6
]
p
u
t
f
o
r
w
ar
d
th
e
p
u
b
lic
s
y
s
te
m
s
t
h
at
en
ab
le
p
u
b
lic
au
d
itin
g
b
y
in
t
eg
r
atin
g
T
P
A
w
it
h
d
y
n
a
m
ic
d
ata.
A
lth
o
u
g
h
th
e
m
eth
o
d
o
lo
g
y
o
f
[
1
7
]
d
o
es
n
o
t
p
r
o
v
id
e
r
ec
o
v
er
y
o
f
d
ata
u
s
i
n
g
B
L
S
s
ig
n
at
u
r
es
a
n
d
th
e
av
a
ilab
le
p
u
b
lic
au
d
iti
n
g
,
i
n
ad
d
itio
n
to
s
u
p
p
o
r
t
f
o
r
d
ata
d
y
n
a
m
ic
p
r
o
ce
s
s
es,
it
d
o
es
n
o
t
h
a
v
e
th
e
p
r
iv
ac
y
p
r
o
tectio
n
w
h
ic
h
th
e
p
r
o
p
o
s
ed
s
y
s
t
e
m
h
a
s
[
1
8
]
.
W
h
ile
Evaluation Warning : The document was created with Spire.PDF for Python.
T
E
L
KOM
NI
K
A
T
elec
o
m
m
u
n
C
o
m
p
u
t E
l
C
o
n
tr
o
l
Dev
elo
p
in
g
a
r
o
b
u
s
t d
a
ta
in
te
g
r
ity
ve
r
ifica
tio
n
fr
a
mewo
r
k
f
o
r
…
(
R
a
ed
A
b
d
u
lk
a
r
ee
m
Ha
s
a
n
)
1099
[
3
]
d
escr
ib
ed
a
s
ch
e
m
e
b
ased
o
n
B
L
S
s
ig
n
at
u
r
es
f
o
r
p
u
b
lic
au
d
itin
g
w
h
ic
h
en
s
u
r
es
p
r
iv
ate
m
ai
n
te
n
a
n
ce
as
w
ell,
b
y
t
h
e
ab
ilit
y
o
f
t
h
e
clie
n
t
to
p
u
r
s
u
e
a
s
i
g
n
atu
r
e
o
n
a
b
lo
ck
an
d
r
ev
ea
l
es
s
en
tia
l
i
n
f
o
r
m
at
io
n
ab
o
u
t
th
e
s
ite.
Si
n
ce
t
h
e
d
ata
o
w
n
er
w
i
l
l
n
o
t
let
t
h
e
e
x
ter
n
al
au
d
ito
r
ch
ec
k
th
eir
cr
itica
l
d
ata,
o
n
e
b
en
ef
it
o
b
tai
n
ed
b
y
th
at
m
ea
n
s
is
th
at
th
e
ex
ter
n
a
l
au
d
ito
r
ca
n
n
o
t
g
et
p
er
s
o
n
al
in
f
o
r
m
atio
n
o
n
th
e
c
lien
ts
’
d
a
ta
r
ath
er
ca
n
c
h
ec
k
th
e
q
u
al
it
y
o
f
t
h
e
e
x
ter
n
al
d
at
a.
I
n
th
eir
w
o
r
k
,
S
h
ac
h
a
m
a
n
d
W
ater
s
[
4
]
p
r
e
s
en
t
a
p
r
iv
ac
y
-
p
r
eser
v
i
n
g
s
y
s
te
m
f
o
r
clo
u
d
d
ata
s
to
r
ag
e,
b
u
t
th
e
s
ch
e
m
e
is
i
n
f
ac
t
u
n
s
af
e
w
h
e
n
u
p
ag
ain
s
t
an
attac
k
in
g
p
r
o
b
ab
ilis
tic
p
o
ly
n
o
m
ia
l
-
ti
m
e
(
P
PT
)
d
is
tin
g
u
i
s
h
er
as
it
e
x
p
licitl
y
s
tate
s
i
ts
in
s
ec
u
r
i
t
y
a
g
ai
n
s
t
t
h
e
attac
k
.
Me
an
w
h
ile,
s
o
m
e
s
tr
ateg
ie
s
i
n
clo
u
d
co
m
p
u
tin
g
w
er
e
i
m
p
le
m
en
ted
to
p
r
o
tect
d
ata
p
r
iv
ac
y
in
c
lo
u
d
co
m
p
u
tin
g
,
as
estab
li
s
h
ed
b
y
a
n
u
m
b
er
o
f
tec
h
n
iq
u
e
s
b
y
[
1
5
]
,
[
1
9
]
.
Sh
en
et
a
l
.
[
1
3
]
m
ak
e
p
r
iv
ac
y
p
r
eser
v
atio
n
wh
er
eb
y
t
h
e
clo
u
d
to
s
er
v
er
ca
n
n
o
t
b
e
ab
le
to
g
et
an
y
u
s
e
f
u
l
in
f
o
r
m
atio
n
f
r
o
m
t
h
e
en
cr
y
p
tio
n
s
cr
ip
ts
co
n
ta
in
ed
in
it.
I
t
w
as
m
ad
e
s
u
r
e
th
at
th
e
ir
s
tr
ateg
y
s
h
o
w
s
n
o
ter
m
s
f
r
eq
u
en
c
y
o
f
ap
p
e
ar
an
ce
.
T
h
is
is
b
ec
au
s
e
o
f
th
e
p
r
iv
ac
y
r
is
k
th
a
t
co
m
e
s
w
it
h
th
e
u
b
iq
u
ito
u
s
i
m
p
le
m
en
ta
tio
n
o
f
u
s
er
‐
s
id
e
d
u
p
licate
d
ata
eli
m
i
n
atio
n
i
n
clo
u
d
s
to
r
ag
e.
Ko
e
an
d
L
i
n
[
2
0
]
p
r
o
p
o
s
ed
a
s
o
lu
tio
n
b
ased
o
n
r
an
d
o
m
r
esp
o
n
s
e
w
h
i
ch
i
n
cr
ea
s
es
t
h
e
p
r
o
b
ab
ilit
y
o
f
attac
k
er
s
f
ail
u
r
e
i
n
g
etti
n
g
i
n
f
o
r
m
atio
n
th
r
o
u
g
h
r
an
d
o
m
ch
ec
k
s
.
I
n
v
ie
w
o
f
t
h
e
b
asic
r
eq
u
ir
e
m
e
n
ts
o
f
d
ata
in
te
g
r
it
y
m
en
tio
n
e
d
ab
o
v
e,
litt
le
ef
f
o
r
t
h
as
b
ee
n
d
i
r
ec
ted
in
th
e
p
ast
to
f
in
d
an
ap
p
r
o
p
r
iate
ap
p
r
o
ac
h
to
th
is
.
T
h
er
ef
o
r
e,
th
is
p
ap
er
g
iv
es
h
ig
h
p
r
io
r
ity
to
th
o
s
e
cr
itical
ar
ea
s
o
f
th
e
s
ec
u
r
it
y
o
f
th
e
clo
u
d
m
o
d
el
an
d
d
ea
ls
w
i
th
t
h
e
r
eten
tio
n
p
r
iv
ac
y
a
n
d
au
th
e
n
tici
t
y
o
f
th
e
d
ata
w
h
ile
p
u
b
lic
ch
ec
k
a
n
d
b
alan
c
e
is
to
b
e
m
ai
n
tai
n
ed
o
n
a
f
o
o
ti
n
g
o
f
co
n
f
id
e
n
ce
.
3.
P
RIM
L
I
M
I
NARIE
S
T
h
e
s
ec
tio
n
o
f
m
eth
o
d
o
lo
g
y
i
s
g
o
in
g
to
in
tr
o
d
u
ce
a
m
ath
e
m
atica
l
f
r
a
m
e
w
o
r
k
u
s
i
n
g
m
u
l
tip
licativ
e
c
y
clic
g
r
o
u
p
s
o
f
p
r
i
m
e
o
r
d
er
w
it
h
a
b
ilin
ea
r
m
ap
p
in
g
p
r
o
p
er
ties
w
h
ich
in
cl
u
d
e
ca
lc
u
lab
i
lit
y
,
b
ili
n
ea
r
it
y
,
an
d
n
o
n
-
d
eg
e
n
er
ac
y
.
T
h
is
s
er
v
es
as
th
e
u
n
d
er
p
in
n
i
n
g
f
o
r
th
e
B
L
S
s
ig
n
atu
r
e
s
c
h
e
m
e
i
n
w
h
ic
h
s
ig
n
er
s
’
cr
ed
ib
ilit
y
is
e
n
s
u
r
ed
w
it
h
in
ga
p
Dif
f
ie
-
Hell
m
a
n
g
r
o
u
p
s
.
T
h
ese
g
r
o
u
p
s
ar
e
r
esi
s
tan
t
to
t
h
e
co
m
p
u
tati
o
n
al
Di
f
f
ie
-
Hell
m
a
n
p
r
o
b
lem
s
b
u
t
en
ab
le
ef
f
icie
n
t
p
air
in
g
o
p
er
atio
n
s
,
th
u
s
th
e
s
ch
e
m
e
is
b
o
th
s
ec
u
r
e
an
d
p
r
ac
tical
f
o
r
cr
y
p
to
g
r
ap
h
ic
ap
p
licatio
n
s
it
is
ex
p
lain
ed
th
e
r
es
u
lts
o
f
r
esear
ch
an
d
at
th
e
d
is
cu
s
s
io
n
ar
e
g
i
v
e
n
co
m
p
r
e
h
en
s
iv
e
l
y
.
R
ef
er
e
n
ce
s
[
1
4
]
,
[
1
5
]
ar
e
cited
,
l
et
’
s
b
r
ea
k
d
o
w
n
t
h
e
d
is
cu
s
s
io
n
in
to
s
ev
e
r
al
p
ar
ts
.
3
.
1
.
P
ilin
ea
r
m
a
p
s
T
h
e
b
ilin
ea
r
m
ap
×
→
is
d
esig
n
e
d
to
m
ee
t
s
e
v
er
al
cr
itical
cr
it
er
ia.
First,
it
is
ca
lcu
lab
le
,
m
ea
n
in
g
t
h
at
th
er
e
e
x
i
s
ts
a
n
e
f
f
ec
ti
v
e
al
g
o
r
ith
m
f
o
r
co
m
p
u
ti
n
g
th
e
m
ap
,
Seco
n
d
,
t
h
e
m
a
p
is
b
ili
n
ea
r
,
w
h
ic
h
is
a
f
u
n
d
a
m
en
ta
l
p
r
o
p
er
ty
i
n
c
r
y
p
to
g
r
ap
h
y
.
T
ak
i
n
g
(
an
d
)
as
m
u
lt
ip
licati
v
e
c
y
c
lic
g
r
o
u
p
s
o
f
p
r
i
m
e
o
r
d
er
(
p
o
)
.
T
h
er
ef
o
r
e,
r
ep
r
esen
ts
th
e
p
r
o
d
u
ce
r
o
f
.
T
h
e
m
ap
:
×
→
w
il
l
b
e
a
b
ilin
ea
r
m
ap
w
h
er
e
th
e
f
o
llo
w
in
g
f
ea
tu
r
e
s
ar
e
ac
h
ei
v
e
d
:
−
C
alcu
lab
le:
ef
f
ec
ti
v
e
p
r
o
ce
s
s
h
ap
p
en
s
o
f
co
m
p
u
ti
n
g
m
ap
(
e)
;
−
B
ilin
ea
r
:
(
,
)
=
(
,
)
f
o
r
ev
er
y
;
∈
w
h
ile
;
∈
;
−
No
n
-
d
e
g
en
er
ac
y
:
(
,
)
g
u
ar
an
tee
s
n
o
t e
q
u
al
to
1
.
T
h
e
eq
u
itio
n
s
h
o
w
s
th
e
d
etails
o
f
m
eth
o
d
t
h
at
co
u
ld
ap
p
r
o
v
e
th
e
i
n
te
g
r
it
y
o
f
d
ata
a
n
d
s
ec
u
r
it
y
k
e
y
to
b
e
u
s
ed
in
ter
m
s
o
f
d
ata
f
le
w
[
2
1
]
-
[
24
]
.
3.
2
.
B
o
neh
-
L
y
nn
-
Sh
a
cha
m
s
ig
na
t
ure
T
h
e
B
L
S
s
ig
n
at
u
r
e
s
c
h
e
m
e
p
er
m
its
t
h
e
clie
n
t
to
as
s
ess
t
h
e
cr
ed
ib
ilit
y
o
f
a
s
i
g
n
er
,
it
m
a
k
es
u
s
e
o
f
g
r
o
u
p
s
r
ef
er
r
ed
to
as
th
e
ga
p
Dif
f
ie
-
Hell
m
a
n
g
r
o
u
p
s
.
T
h
e
co
m
p
u
tatio
n
al
Di
f
f
ie
-
Hell
m
an
p
r
o
b
lem
s
ar
e
n
o
t
ea
s
il
y
s
o
lv
ed
i
n
t
h
ese
g
r
o
u
p
s
,
th
e
y
ca
n
h
o
w
ev
er
b
e
s
o
l
v
ed
as
a
r
esu
lt o
f
its
c
h
ar
ac
ter
is
t
ic
n
o
n
-
d
eg
e
n
er
ate,
ea
s
y
to
co
m
p
u
te
as
w
ell
as b
ili
n
ea
r
p
air
in
g
s
f
ea
t
u
r
es
[
18
].
Ass
u
m
e
th
at
×
→
is
a
n
o
n
-
d
eg
e
n
er
ate,
ca
lcu
lab
le,
b
ilin
ea
r
,
an
d
t
h
at
(
,
)
ar
e
p
r
im
e
o
r
d
er
s
ets.
A
llo
w
c
to
b
e
o
n
e
o
f
t
h
e
g
en
er
ato
r
s
.
C
o
n
s
id
er
t
h
e
,
,
,
ca
s
e
o
f
t
h
e
co
m
p
u
tatio
n
a
l
Di
f
f
ie
-
Hell
m
a
n
is
s
u
e.
T
h
e
co
m
p
u
tatio
n
o
f
,
w
h
ich
is
t
h
e
co
m
p
u
tatio
n
al
Dif
f
ie
-
Hell
m
a
n
p
r
o
b
le
m
’
s
r
eso
lu
t
i
o
n
,
is
n
o
t
aid
ed
b
y
t
h
e
p
air
in
g
f
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cr
y
p
ted
DF
as
in
p
u
t
w
h
er
e
th
e
o
u
tp
u
t
f
o
r
th
i
s
f
u
n
c
tio
n
w
il
l
b
e
a
s
ig
n
at
u
r
e
f
o
r
ea
ch
b
lo
ck
o
f
th
e
d
ata.
On
th
e
o
th
er
h
an
d
,
it
g
en
er
ates
m
etad
ata
(
E
m
eta)
,
w
h
ic
h
in
cl
u
d
es
b
lo
ck
n
a
m
e
(
m
i)
.
T
h
en
,
th
e
en
cr
y
p
ted
d
ata
b
lo
ck
s
ar
e
m
o
v
ed
to
th
e
clo
u
d
s
to
r
ag
e
b
y
t
h
e
u
s
er
,
to
g
eth
er
w
i
th
t
h
e
ac
co
m
p
a
n
y
i
n
g
s
i
g
n
atu
r
e
s
an
d
th
e
p
u
b
lic
k
e
y
.
C
h
al
len
g
e_
g
e
n
er
atio
n
:
t
h
e
ch
allen
g
e
g
e
n
er
atio
n
f
u
n
ctio
n
i
s
o
n
e
o
f
th
e
in
te
g
r
it
y
c
h
ec
k
f
u
n
ctio
n
s
.
W
h
er
e
th
e
v
er
if
icatio
n
o
f
t
h
e
d
ata
o
n
clo
u
d
is
r
eq
u
ir
ed
,
th
e
th
ir
d
p
ar
ty
is
u
s
ed
,
th
er
ef
o
r
e,
a
tr
u
s
ted
ac
co
u
n
t,
T
P
A
is
r
eq
u
ir
ed
in
t
h
e
s
y
s
te
m
.
T
h
i
s
ac
co
u
n
t
is
ac
ti
v
ated
b
y
th
e
u
s
er
an
d
s
en
d
s
m
etad
ata
(
E
m
eta)
as
in
p
u
t
f
o
r
th
is
f
u
n
ctio
n
to
T
P
A
f
o
r
a
u
d
it
in
g
[
30
]
-
[
36
]
.
T
o
p
r
o
v
e
f
ile
in
teg
r
it
y
,
t
h
e
T
P
A
co
m
m
u
n
icate
s
w
it
h
t
h
e
C
SP
.
T
o
co
m
e
u
p
w
i
th
t
h
e
ch
alle
n
g
e
m
ess
a
g
e
w
h
er
e
T
P
A
ch
o
o
s
es
an
ele
m
en
t
k
at
r
an
d
o
m
an
d
a
s
u
b
s
et
o
f
Q
f
r
o
m
s
et
[
1
,
n
]
an
d
q
i
∈
Gr
f
r
o
m
s
et
[
1
,
n
]
.
A
s
s
u
m
i
n
g
Q
d
en
o
tes t
h
e
s
et
(
i,
q
i)
,
i
∈
Q,
th
e
r
esu
l
tin
g
T
P
A
s
en
d
s
Q
to
C
SP
.
R
esp
o
n
s
e
:
a
t
th
e
ti
m
e
th
e
C
SP
h
as
o
b
tain
ed
a
test
f
r
o
m
th
e
T
P
A
,
th
e
clien
t
r
ec
ei
v
es
a
q
u
e
s
tio
n
f
r
o
m
th
e
C
SP
to
v
al
id
ate
t
h
at
te
s
t,
a
n
d
th
i
s
c
y
cle
to
i
m
p
r
o
v
e
th
e
v
alid
atio
n
o
f
t
h
e
ce
r
ti
f
ied
T
P
A
.
I
n
th
e
ca
s
e
w
h
er
e
th
e
clien
t
s
co
n
s
e
n
ts
to
th
e
q
u
er
y
,
th
e
clo
u
d
co
m
p
u
ti
n
g
s
er
v
i
ce
p
r
o
v
id
er
ac
k
n
o
w
led
g
es
th
e
r
eq
u
est.
W
h
en
th
e
C
SP
r
ec
eiv
es
t
h
e
clie
n
t
’
s
ac
k
n
o
w
led
g
m
en
t,
th
e
C
SP
c
r
ea
tes
a
tr
u
s
t
w
o
r
t
h
i
n
ess
c
h
ec
k
f
o
r
t
h
e
test
,
r
ep
r
esen
ted
b
y
P
r
o
o
f
(
Si,P
i)
[
3
7
]
,
[
38
]
.
T
h
e
eq
u
atio
n
allo
w
s
u
s
to
s
u
m
m
an
y
s
ig
n
s
o
f
d
if
f
er
en
t
s
q
u
ar
es
in
to
o
n
e
b
y
r
el
y
i
n
g
o
n
th
e
f
ea
tu
r
e
s
o
f
t
h
e
co
m
p
u
t
atio
n
(
B
L
S)
(
3
)
.
T
h
e
w
o
r
k
er
t
h
en
s
u
b
m
it
s
an
as
s
er
tio
n
(
P
r
o
o
f
)
to
th
e
r
ev
ie
w
er
f
o
r
th
eir
ap
p
r
o
v
al.
=
∏
̇
=
1
(
3
)
P
r
o
o
f
ch
ec
k
i
n
g
:
f
i
n
all
y
,
w
h
e
n
th
e
v
alid
ato
r
o
b
tain
s
th
e
p
r
o
o
f
th
at
in
cl
u
d
es
th
e
e
n
d
s
o
f
th
e
eq
u
atio
n
s
o
th
at
th
e
s
ig
n
at
u
r
e
(
S)
is
w
it
h
an
ele
m
en
t
(
c)
o
n
th
e
f
ir
s
t
s
i
d
e
o
f
th
e
eq
u
atio
n
a
n
d
th
e
p
u
b
lic
k
e
y
(
P
)
w
it
h
t
h
e
m
es
s
ag
e
h
as
h
f
u
n
ctio
n
(
H(
m
)
)
o
n
th
e
o
th
er
s
id
e
o
f
t
h
e
eq
u
at
io
n
f
r
o
m
t
h
e
C
SP
,
it
v
alid
ates
th
e
r
etu
r
n
ed
p
r
o
o
f
u
s
i
n
g
th
e
(
4
)
.
I
t
ch
ec
k
s
t
h
e
p
r
o
o
f
,
th
en
s
e
n
d
s
t
h
e
r
esu
l
t
to
th
e
u
s
er
w
h
et
h
er
s
u
cc
e
s
s
f
u
l
o
r
f
ailed
as
th
e
ca
s
e
m
a
y
b
e.
=
∏
̇
=
1
e
(
S
,
c
)
=
e
(
∏
(
H
(
)
.
)
=
1
)
(
4
)
4
.
2
.
Su
pp
o
rt
o
f
da
t
a
dy
na
m
i
c
o
pera
t
io
ns
E
x
ter
n
al
d
ata
is
ac
ce
s
s
ed
a
n
d
u
p
d
ated
m
u
ch
b
y
u
s
er
s
in
th
e
clo
u
d
m
o
d
el
f
o
r
m
a
n
y
ap
p
licatio
n
n
ee
d
s
[
2
1
]
.
T
h
er
ef
o
r
e,
it
is
im
p
o
r
tan
t
to
en
ab
le
d
ata
d
y
n
a
m
ic
s
f
o
r
th
e
s
ak
e
o
f
p
r
iv
ac
y
a
s
w
e
ll
as
p
u
b
lic
au
d
itin
g
.
I
n
ad
d
itio
n
,
th
e
r
esear
ch
w
ill
s
h
o
w
h
o
w
w
el
l
th
e
s
y
s
te
m
h
a
n
d
les
d
ata
d
y
n
a
m
ic
s
at
th
e
b
lo
ck
lev
el,
th
at
is
,
u
p
d
ates,
r
e
m
o
v
al
s
,
an
d
in
s
er
ti
o
n
s
.
Mo
d
if
icatio
n
o
f
a
d
ata
b
lo
ck
:
in
th
e
clo
u
d
m
o
d
el,
it
is
o
n
e
v
er
y
p
o
p
u
l
ar
w
a
y
f
o
r
in
f
o
r
m
atio
n
.
T
h
is
cr
itical
w
a
y
i
n
v
o
lv
es
s
w
ap
p
in
g
o
u
t
t
h
e
b
lo
ck
s
w
it
h
th
e
n
e
w
o
n
e
s
.
Si
n
ce
t
h
e
cu
s
to
m
er
c
h
an
g
es
b
lo
c
k
(
ei)
to
b
lo
ck
(
ei)
.
First,
th
e
clie
n
t
s
e
n
d
s
h
is
r
eq
u
e
s
t
to
th
e
c
lo
u
d
b
y
g
etti
n
g
it
ed
ited
b
y
th
e
b
lo
ck
(
ei)
,
th
en
t
h
e
clie
n
t
d
ev
e
lo
p
s
th
e
p
r
iv
ate
an
d
p
u
b
l
ic
k
e
y
s
an
d
g
i
v
es
n
e
w
r
a
n
d
o
m
v
al
u
es
(
X,
Y)
to
b
e
u
s
ed
in
d
ev
elo
p
in
g
t
h
e
n
e
w
s
ig
n
at
u
r
e
(
Si)
(
S)
f
o
r
th
e
u
p
d
a
ted
b
lo
ck
(
ei
)
th
r
o
u
g
h
(
1
)
.
Ha
v
in
g
s
u
b
m
it
ted
th
e
r
eq
u
est
to
t
h
e
clo
u
d
co
m
p
u
tin
g
f
o
r
th
e
r
e
m
o
v
al
o
f
th
e
o
ld
b
lo
ck
(
ei)
w
i
th
t
h
e
co
r
r
esp
o
n
d
i
n
g
v
alu
e
s
,
th
e
m
etad
ata
o
f
t
h
e
u
p
d
ated
b
l
o
ck
(
E
in
f
o
)
is
as
w
ell
u
p
d
ated
,
w
h
ic
h
co
n
tai
n
s
(
m
i,X
Yi)
.
A
t
last
,
u
p
lo
ad
th
e
m
o
d
if
ied
b
lo
ck
(
ei
)
w
it
h
th
e
v
al
u
es
(
S,
P
)
to
th
e
clo
u
d
an
d
th
e
u
p
d
ated
m
etad
ata
i
s
also
tr
an
s
f
er
r
ed
t
o
th
e
T
P
A
.
I
n
s
er
t
d
at
a
b
lo
ck
:
in
t
h
e
clien
t
en
co
d
ed
DF
(
E
c)
k
ep
t
o
n
th
e
clien
t,
d
ata
in
te
g
r
atio
n
m
ea
n
s
ad
d
in
g
n
e
w
co
n
s
u
m
er
b
lo
ck
s
af
ter
t
h
e
d
esig
n
ated
p
lace
.
I
f
th
e
b
lo
ck
w
ill
b
e
in
s
er
ted
p
o
s
t
th
e
ea
r
lier
o
n
e.
T
h
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
1
6
9
3
-
6930
T
E
L
KOM
NI
K
A
T
elec
o
m
m
u
n
C
o
m
p
u
t E
l
C
o
n
tr
o
l
,
Vo
l.
23
,
No
.
4
,
A
u
g
u
s
t
20
25
:
1
0
9
7
-
11
0
7
1102
cu
s
to
m
er
w
i
ll
ch
o
o
s
e
th
e
b
lo
ck
s
h
e
w
a
n
ts
to
ad
d
,
en
cr
y
p
t
it
(
ei
)
,
b
u
ild
th
e
s
ec
r
et
k
e
y
s
(
K
an
d
P
)
an
d
p
r
o
d
u
ce
th
e
S
s
ig
n
at
u
r
e
f
o
r
th
is
b
lo
ck
b
y
ch
o
o
s
in
g
a
r
an
d
o
m
n
u
m
b
er
(
x
,
y
)
.
Sp
ec
if
icall
y
,
in
f
o
r
m
a
tio
n
(
E
m
eta)
f
o
r
it
s
h
all
b
e
cr
ea
ted
.
T
h
e
u
s
er
th
e
n
s
e
n
d
s
(
E
m
eta)
to
th
e
T
P
A
,
alo
n
g
w
it
h
t
h
e
b
lo
ck
s
(
ei)
an
d
its
r
elate
d
v
alu
es
(
Si,P
i)
.
Dele
te
d
ata
b
lo
ck
:
a
s
in
g
le
b
lo
ck
f
r
o
m
a
u
s
er
f
ile
s
a
v
ed
in
t
h
e
clo
u
d
,
af
ter
w
h
ic
h
all
f
o
llo
w
i
n
g
b
lo
ck
s
ar
e
p
u
s
h
ed
ah
ea
d
h
e
n
ce
d
ata
in
s
er
tio
n
p
o
lar
o
p
p
o
s
ite.
So
if
th
er
e
n
ee
d
b
e
th
e
b
lo
ck
(
ei)
,
a
s
tr
aig
h
t
r
eq
u
est
w
it
h
th
e
b
lo
ck
s
’
n
a
m
es
to
th
e
w
eb
s
er
v
er
to
d
elete
a
p
ar
ticu
lar
n
a
m
ed
b
lo
ck
(
ei)
f
r
o
m
t
h
e
clien
t
f
iles
in
cl
u
d
in
g
it
s
d
ata
(
Si,
P
i)
,
an
d
th
e
s
a
m
e
q
u
e
s
tio
n
to
th
e
clo
u
d
at
th
e
s
a
m
e
ti
m
e.
T
h
e
b
lo
ck
n
a
m
e
is
also
i
n
t
h
e
T
P
A
s
o
T
P
A
w
ill er
ase
t
h
e
b
lo
ck
s
n
a
m
e
(
m
i)
f
r
o
m
th
e
(
ei)
b
lo
ck
.
5.
RE
SU
L
T
T
h
e
p
r
im
ar
y
f
o
cu
s
o
f
th
e
r
es
u
l
ts
s
ec
tio
n
i
s
o
n
th
e
s
a
f
et
y
i
n
s
p
ec
tio
n
o
f
th
e
s
y
s
te
m
,
d
eter
m
in
ed
u
s
in
g
a
s
tatis
t
ical
ass
e
s
s
m
e
n
t
m
eth
o
d
b
ased
o
n
ex
ec
u
tio
n
ti
m
in
g
.
T
h
e
an
al
y
s
i
s
ev
al
u
ate
s
th
e
s
y
s
te
m
’
s
v
alid
it
y
,
co
v
er
in
g
asp
ec
t
s
li
k
e
to
k
en
u
n
p
r
ed
ictab
ilit
y
,
d
ata
i
n
te
g
r
it
y
,
s
ec
u
r
it
y
,
co
n
f
id
en
t
ialit
y
,
a
n
d
o
v
er
all
s
y
s
te
m
p
r
o
tectio
n
.
T
h
eo
r
em
1
s
u
p
p
o
r
ts
th
e
s
y
s
te
m
’
s
s
ec
u
r
it
y
,
s
tat
in
g
th
a
t
a
tr
u
s
ted
th
ir
d
p
ar
t
y
(
T
P
A
)
ca
n
ac
c
u
r
atel
y
v
er
if
y
th
e
i
n
te
g
r
it
y
o
f
e
n
cr
y
p
ted
d
ata
b
lo
ck
s
.
T
h
e
p
r
o
o
f
in
v
o
l
v
es
b
ili
n
ea
r
m
ap
p
in
g
p
r
o
p
er
ties
an
d
b
lo
ck
id
en
tit
y
v
er
i
f
icatio
n
,
w
ith
t
h
e
clo
u
d
g
en
er
ati
n
g
a
p
r
o
o
f
f
o
r
th
e
au
d
ito
r
to
co
n
f
ir
m
v
alid
it
y
.
5
.
1.
Securit
y
a
na
ly
s
is
T
h
e
m
aj
o
r
cr
iter
io
n
is
s
a
f
et
y
i
n
s
p
ec
tio
n
,
w
h
ich
is
d
eter
m
i
n
e
d
u
s
i
n
g
o
u
r
s
tati
s
tical
a
s
s
e
s
s
m
en
t
m
et
h
o
d
an
d
is
b
ased
o
n
th
e
h
o
u
r
o
f
e
x
ec
u
t
io
n
.
T
h
is
d
escr
ip
tio
n
e
x
a
m
i
n
es
t
h
e
v
al
id
it
y
o
f
th
e
p
r
o
p
o
s
ed
s
y
s
te
m
,
to
k
e
n
u
n
p
r
ed
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ilit
y
,
s
tati
s
tics
h
o
n
est
y
i
n
s
u
r
an
ce
,
s
af
et
y
s
a
f
e
g
u
ar
d
in
g
,
s
ec
r
ec
y
,
a
n
d
clu
m
p
s
ec
u
r
it
y
.
T
h
e
v
alid
it
y
o
f
t
h
i
s
eq
u
atio
n
i
s
co
n
s
id
er
ed
to
p
r
o
v
e
th
e
s
ec
u
r
i
t
y
o
f
t
h
e
p
r
o
p
o
s
ed
s
y
s
te
m
:
−
T
h
eo
r
em
1
:
“
p
r
o
v
id
ed
a
d
ata
f
ile
DF=d
f
1
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f
n
an
d
th
e
en
cr
y
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ted
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1
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.
.
.
.
.
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a
n
d
s
ig
n
at
u
r
e
S=s
1
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n
o
n
E
,
w
i
th
n
b
ei
n
g
t
h
e
n
u
m
b
er
o
f
f
ile
s
b
lo
ck
s
th
at
ar
e
e
n
cr
y
p
ted
;
t
h
e
n
,
T
PA
ca
n
r
i
g
h
tl
y
p
r
o
v
e
th
e
in
te
g
r
it
y
o
f
E
as s
u
g
g
ested
b
y
t
h
e
p
r
o
p
o
s
ed
s
y
s
te
m
.
”
−
P
r
o
o
f
:
in
o
r
d
er
to
ass
ess
th
e
a
cc
u
r
ac
y
o
f
t
h
e
p
r
o
p
o
s
ed
s
y
s
te
m
,
it
i
s
n
ec
es
s
ar
y
to
p
r
o
v
e
t
h
e
v
alid
it
y
o
f
(
3
)
.
R
ely
i
n
g
o
n
th
e
b
ili
n
ea
r
m
ap
p
in
g
s
p
r
o
p
er
ties
,
an
d
ch
ec
k
in
g
f
o
r
th
e
co
r
r
ec
tn
ess
o
f
f
ile
E
,
T
P
A
r
an
d
o
m
l
y
c
h
o
o
s
es
s
o
m
e
b
lo
ck
id
en
titi
es
s
(
m
i)
o
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f
ile
E
to
co
m
p
u
te
t
h
e
ch
alle
n
g
e
(
Q)
,
w
it
h
Q
=
{i,
q
i},
i=1
,
.
.
.
,
k
.
Up
o
n
r
ec
eiv
in
g
Q
f
r
o
m
T
P
A
,
th
e
p
r
o
o
f
(
P
r
o
o
f
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i
s
co
m
p
u
ted
b
y
t
h
e
clo
u
d
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w
it
h
P
={
S,
P
i}
an
d
tr
an
s
m
it
to
th
e
au
d
ito
r
to
ch
ec
k
f
o
r
th
e
v
alid
it
y
o
f
th
e
r
ec
eiv
ed
P
b
y
p
r
o
v
in
g
(
4
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in
th
e
f
o
llo
w
in
g
w
a
y
:
(
,
)
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(
∏
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(
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,
.
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(
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.
.
T
h
e
r
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ch
er
ca
n
g
en
er
ate
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ig
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at
u
r
e
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(
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So
th
e
p
r
o
p
o
s
ed
s
y
s
te
m
g
u
ar
a
n
tee
is
co
r
r
ec
ted
.
5
.
2
.
P
er
f
o
rm
a
nce
a
na
ly
s
i
s
An
o
th
er
i
m
p
o
r
tan
t
p
er
f
o
r
m
a
n
ce
m
etr
ic
is
t
h
e
ev
al
u
atio
n
o
f
th
e
p
r
o
p
o
s
ed
f
r
am
e
w
o
r
k
’
s
p
r
o
d
u
ctiv
it
y
w
it
h
r
esp
ec
t
to
ex
ec
u
tio
n
test
i
n
g
,
s
o
th
e
r
esear
ch
er
ca
n
d
e
m
o
n
s
tr
ate
th
e
f
r
a
m
e
w
o
r
k
’
s
e
x
is
ten
ce
o
n
all
s
id
es,
in
cl
u
d
in
g
th
e
clie
n
t,
ev
a
lu
at
o
r
,
an
d
clo
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d
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p
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t
o
r
g
an
iz
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s
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n
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h
is
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t
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,
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e
r
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ch
er
w
ill
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alu
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r
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g
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ested
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r
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w
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e
x
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ter
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o
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co
r
r
esp
o
n
d
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ce
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d
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lcu
latio
n
co
s
ts
,
as:
−
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m
p
u
tatio
n
co
s
t:
e
x
p
en
s
es
a
ttach
ed
to
m
a
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u
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in
g
k
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ll
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o
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er
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p
r
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m
u
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ica
tio
n
co
s
t
:
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h
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n
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u
d
e
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h
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n
s
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e
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e
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Fig
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6.
CO
NCLU
SI
O
N
An
au
d
it
m
et
h
o
d
b
ased
o
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th
e
s
ig
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at
u
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e
(
B
L
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h
as
b
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p
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p
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o
tect
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ata
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in
th
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p
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tr
o
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ata
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y
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n
cr
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ti
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g
i
t
b
ef
o
r
e
u
p
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g
to
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h
e
clo
u
d
.
D
y
n
a
m
ic
d
ata
o
p
er
atio
n
s
i
n
cl
u
d
in
g
i
n
s
er
tio
n
,
d
eletio
n
,
a
n
d
m
o
d
i
f
icat
io
n
ar
e
al
s
o
av
ai
lab
le.
B
ec
au
s
e
s
ig
n
at
u
r
e
au
th
e
n
tica
tio
n
r
eq
u
ir
es
o
n
l
y
o
n
e
co
m
p
o
n
e
n
t,
t
h
e
r
esear
c
h
er
ex
p
licitl
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p
r
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v
es
th
a
t
t
h
e
ca
lcu
latio
n
co
s
t
o
f
en
s
u
r
in
g
d
ata
in
teg
r
it
y
is
lo
w
f
o
r
th
e
au
d
it
in
g
tas
k
.
A
s
a
r
es
u
lt,
t
h
e
co
s
t
o
f
s
to
r
in
g
a
n
d
tr
an
s
m
itt
in
g
s
i
g
n
at
u
r
e
s
ca
n
b
e
r
ed
u
ce
d
.
T
h
e
p
r
o
p
o
s
e
d
s
y
s
te
m
i
s
in
cr
ed
ib
l
y
e
f
f
ic
ie
n
t
an
d
s
ec
u
r
e,
ac
co
r
d
in
g
to
th
e
d
etailed
an
al
y
s
is
.
Fo
r
th
e
s
u
cc
es
s
f
u
l
a
n
al
y
s
i
s
o
f
th
e
s
y
s
te
m
’
s
e
f
f
ec
tiv
e
n
e
s
s
,
its
p
er
f
o
r
m
a
n
ce
is
co
m
p
ar
e
d
to
th
at
o
f
o
th
er
s
y
s
te
m
s
.
T
h
e
r
esu
lt
s
r
ev
ea
l
t
h
at
th
e
p
r
o
p
o
s
ed
s
y
s
te
m
is
s
i
m
p
le
in
ter
m
s
o
f
co
m
p
u
ti
n
g
an
d
co
m
m
u
n
icatio
n
.
T
h
e
r
esear
ch
er
h
as
n
o
ticed
h
o
w
th
i
s
s
y
s
te
m
is
s
et
u
p
to
b
e
v
er
y
ef
f
icie
n
t
in
m
ai
n
tai
n
i
n
g
t
h
e
co
n
f
id
e
n
tiali
t
y
o
f
th
e
d
atab
ase
s
c
h
e
m
e
u
s
ed
a
n
d
o
n
w
h
ich
h
e
r
a
n
t
h
is
te
s
t,
b
u
t
w
h
at
i
f
t
h
e
d
ata
i
s
m
as
s
iv
e
in
s
ca
le?
Ho
w
w
il
l
i
t
b
e
s
ec
u
r
ed
an
d
p
r
o
tecte
d
w
it
h
t
h
e
s
a
m
e
lev
el
o
f
s
ec
u
r
it
y
an
d
e
f
f
ec
t
iv
e
n
es
s
,
a
n
d
m
o
s
t
i
m
p
o
r
tan
tl
y
,
i
n
a
r
ea
s
o
n
ab
le
a
m
o
u
n
t o
f
t
i
m
e?
T
h
is
i
s
s
o
m
e
th
i
n
g
th
a
t
w
ill b
e
f
u
r
th
er
i
n
v
e
s
ti
g
ated
in
s
u
b
s
eq
u
en
t st
u
d
ies.
RE
F
E
R
E
NC
E
S
[
1
]
J.
K
o
,
C
.
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u
,
M
.
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.
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.
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.
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,
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Pr
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y
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.
[
3
]
A
.
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.
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l
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sk
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,
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p
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[
4
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W
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t
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v
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,
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re
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o
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C
o
m
p
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5
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.
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,
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,
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R
e
n
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d
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.
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o
u
,
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-
p
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serv
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p
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f
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l
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c
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mp
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g
,
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n
Pro
c
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e
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-
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.
[
6
]
C
.
W
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n
g
,
S
.
S
.
M
.
C
h
o
w
,
Q
.
W
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g
,
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R
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n
,
a
n
d
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.
L
o
u
,
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P
r
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f
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se
c
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c
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d
st
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r
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e
,
”
I
EEE
T
ra
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s
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C
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m
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[
7
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S
.
G
.
W
o
r
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,
C
.
X
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,
J.
Z
h
a
o
,
a
n
d
X
.
H
e
,
“
S
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me
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,
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C
o
m
p
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a
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d
E
l
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[
8
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X
.
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n
,
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.
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n
g
,
Y
.
M
u
,
a
n
d
Y
.
Y
u
,
“
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t
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.
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.
[
9
]
H
.
L
i
u
,
L
.
C
h
e
n
,
Z
.
D
a
v
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r
,
a
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d
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R
.
P
o
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r
,
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e
me
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d
d
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st
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g
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,
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J
o
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f
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[
1
0
]
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.
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.
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a
h
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o
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d
D
.
J
.
H
u
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n
g
,
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PSO
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o
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.
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.
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