In peer-to-peer (P2P) reputation systems,each peer's trustworthiness is evaluated based on its pseudonym's rating values given by other peers. Since it is assumed that each peer has a long lived pseudonym,all ...In peer-to-peer (P2P) reputation systems,each peer's trustworthiness is evaluated based on its pseudonym's rating values given by other peers. Since it is assumed that each peer has a long lived pseudonym,all the transactions conducted by the same peer may be linked by its pseudonym. Therefore,one of the fundamental challenges in P2P reputation systems is to protect peers' identity privacy. In this paper,we present two independent anonymity protocols to achieve all the peers' anonymity by changing pseudonym with the help of a trusted third party (TTP) server. Compared with RuP (Reputation using Pseudonym),an existing representative scheme,our protocols reduce the server's cost in two different ways. First,we propose a protocol using blind signature scheme as in RuP. The protocol improves the blind signature scheme and assessment of macro-node values,and reduces the server's cost by half in terms of encryption and decryption operations and message overhead. Second,we propose another protocol,group-confusion protocol,to further reduce the server's cost.展开更多
Security problem is an important issue for Wireless Sensor Network.The paper focuses on the privacy protection of WSN applications.An anonymity enhancement tactic based on pseudonym mechanism is presented for clustere...Security problem is an important issue for Wireless Sensor Network.The paper focuses on the privacy protection of WSN applications.An anonymity enhancement tactic based on pseudonym mechanism is presented for clustered Wireless Sensor Network,which provides anonymity for both the sensors within a cluster and the cluster head nodes.Simulation experiments are launched through NS2 platform to validate the anonymity performance.The theoretical analysis and empirical study imply that the proposed scheme based on pseudonym can protect the privacies of both the sensor nodes and the cluster head nodes.The work is valuable and the experimental results are convincible.展开更多
In this paper, we proposed an anonymity scheme based on pseudonym where peers are motivated not to share their identity. Compared with precious scheme such as RuP （Reputation using Pseudonyms）, our scheme can reduce...In this paper, we proposed an anonymity scheme based on pseudonym where peers are motivated not to share their identity. Compared with precious scheme such as RuP （Reputation using Pseudonyms）, our scheme can reduce its overhead and minimize the trusted center＇s involvement.展开更多
基金the National High Technology Research and Development Program (863) of China(No. 07QA14033)the National Natural Science Foundation of China(No.60702047)
文摘In peer-to-peer (P2P) reputation systems,each peer's trustworthiness is evaluated based on its pseudonym's rating values given by other peers. Since it is assumed that each peer has a long lived pseudonym,all the transactions conducted by the same peer may be linked by its pseudonym. Therefore,one of the fundamental challenges in P2P reputation systems is to protect peers' identity privacy. In this paper,we present two independent anonymity protocols to achieve all the peers' anonymity by changing pseudonym with the help of a trusted third party (TTP) server. Compared with RuP (Reputation using Pseudonym),an existing representative scheme,our protocols reduce the server's cost in two different ways. First,we propose a protocol using blind signature scheme as in RuP. The protocol improves the blind signature scheme and assessment of macro-node values,and reduces the server's cost by half in terms of encryption and decryption operations and message overhead. Second,we propose another protocol,group-confusion protocol,to further reduce the server's cost.
基金the National Natural Science Foundation of China (NSFC) under grant No.61309024,the National Key Basic Research Program of China (973) under Grant No.2013CB834204,the Fundamental Research Funds for the Central Universities under grant No.14CX06009A at China University of Petroleum
文摘Security problem is an important issue for Wireless Sensor Network.The paper focuses on the privacy protection of WSN applications.An anonymity enhancement tactic based on pseudonym mechanism is presented for clustered Wireless Sensor Network,which provides anonymity for both the sensors within a cluster and the cluster head nodes.Simulation experiments are launched through NS2 platform to validate the anonymity performance.The theoretical analysis and empirical study imply that the proposed scheme based on pseudonym can protect the privacies of both the sensor nodes and the cluster head nodes.The work is valuable and the experimental results are convincible.
文摘In this paper, we proposed an anonymity scheme based on pseudonym where peers are motivated not to share their identity. Compared with precious scheme such as RuP （Reputation using Pseudonyms）, our scheme can reduce its overhead and minimize the trusted center＇s involvement.
