1 A secure model for controlling the hubs in P2P wireless network based on trust value Authors: Y....
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1 A secure model for contr olling the hubs in P2P w ireless network based on trust value Authors: Y. Liu, N. Xiong, K. Xu, J. H. Park, and C. Lin Source: Computer Communications, v ol. 33, pp. 997-1004, 2010 Speaker: Shu-Fen Chiou ( 邱邱邱 )
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Transcript of 1 A secure model for controlling the hubs in P2P wireless network based on trust value Authors: Y....
1
A secure model for controlling the hubs in P2P wireless network based on trust value
Authors: Y. Liu, N. Xiong, K. Xu, J. H. Park, and C. LinSource: Computer Communications, vol. 33, pp. 997-1004, 2010Speaker: Shu-Fen Chiou ( 邱淑芬 )
2
Free riders
0
1
2
3
Free rider
3
Concepts
High trust value and low connections can get better quality of service.
Prevent free riders
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Proposed method
resource. typefor and between trans.of successes ofnumber :)(, kvvs jikji
resource. typefor and between trans.of fail ofnumber :)(, kvvf jikji
. node a from node a of ue trust val theof sum:)(, ijkji vvT
5
Proposed method
0,1,)()(
)()(,
kijkij
kijkji fs
sD
resources type for the node a and node abetween st valuedirect tru:)(, kvvD jikji
4
6
5
10
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)(,
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)(,
kai
kai
kji
kji
f
s
f
sVa
1,1,625.015110
10)(,
kjiD
1,1,55.01416
6)(,
kaiD
•Direct trust value
6
Proposed method
xkx
jkj
vkT
vkRt
set in resource type of ue trust val theof sum:
nodein resources type of ue trust valrecommend:
)(
)(
34.03.06.02.08.0
84.075.08.06.04.0
)(
)(
ka
kj
Rt
Rt
55.0
625.0
4
6
5
10
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)(,
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)(,
kai
kji
kai
kai
kji
kji
D
D
f
s
f
sVa•Recommend trust value
ixBx
kxjkxkj
kj
DTRt&
)()()(
)(
7
Proposed method
445.034.05.055.05.0
7325.084.05.0625.05.0
1,0,
)(
)(
)()()(
kia
kij
kjkijkij
T
T
RtDT
•Trust value
34.0
84.0
55.0
625.0
4
6
5
10
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ka
kj
kai
kji
kai
kai
kji
kji
Rt
Rt
D
D
f
s
f
s Va
8
Proposed method•Select resource provider
445.0
7325.0
34.0
84.0
55.0
625.0
4
6
5
10
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kia
kij
ka
kj
kai
kji
kai
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T
T
Rt
Rt
D
D
f
s
f
sVa
node a of sconnection ofnumber :)(
sconnection download
concurrent ofnumber greatest :)(
)(
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)()(
iN
iD
eTQ iN
iD
Bjkijkij
j
5)(,20)(,3466.0445.0
10)(,20)(,4443.07325.0
20
5
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20
10
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iDiNeQ
iDiNeQ
kia
kij
9
Simulation results
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Comments The free riders can not respond the
request msg. Only the initiator considers the
trust value of resource provider.
