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MMM2006: 12th International Multi-Media Modelling Conference

作者： Yin, Zhong Hai Wang, Kun Jian, Jianfeng Zhou, Lihua Ministry of Edu. Key Lab. of Computer Network and Infor. Security Xidian Univ. Xi'an 710071 China School of Science Air Force Engineering Univercity Xi'an 710077 China

ISBN: (纸本)1424400287

The defect of existing fidelity definition is discussed, by using this definition, it is found that two obviously different image can be determined to be approximate or the same. According to the defect, an improved fidelity definition is presented. The difference and relation between the two definitions are discussed and the analytic expression for deriving one definition from the other is also presented. © 2006 IEEE.

关键词： Image analysis

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A(k,n) Threshold Nominative Proxy Signature Scheme for Electronic Commerce

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Journal of China University of Mining and Technology 2006年第4期16卷 470-474页

作者： XIN Xiang-jun WANG Mei-zhi XIAO Guo-zhen The Ministry of Edu. Key Lab. of Computer Network and Infor. Security Xidian University Xi＇ an Shanxi 710071 China Department of lnformation and Computing Science Zhengzhou University of Light Industry Zhengzhou Henan 450002 China Department of Math. ＆ Physics Zhumadian Institute of Education Zhumadian Henan 463000 China

By using the Lagrange interpolation formula and the technology of signature of equality, a (k, n) threshold nominative proxy signature scheme is proposed, where an original signer delegates his (her) signing power to a proxy, who generates a nominative signature on behalf of the original signer and only k or more active verifiers in the n nominees (verifiers) nominated by the proxy signer can verify the signature signed by the proxy. If necessary, these (k or more) active nominees (verifiers) can prove its validity to a third party. In this scheme, the secret shares are generated and en- crypted by the original signer. At the same time, the ciphertexts of the secret shares are used as parts of the signature. Then, the secret shares need not be sent to the nominees (verifiers) secretly. The ordinary nominative proxy signature can be viewed as a (1, 1) threshold nominative proxy signature. The ordinary nominative proxy signature can be viewed as a special case of a (k, n) threshold nominative proxy signature. According to the security analysis of this paper, it is found that our scheme is secure against a proxy signing key forgery attack and existential forgery on an adaptive chosen message attack.

关键词： digital signature nominative signature proxy signature

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Abuse-freeness electronic payment protocol

Abuse-freeness electronic payment protocol

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3rd IEEE International Conference on Intelligent networking and Collab.rativeSystems, INCoS 2011

作者： Fan, Kai Wang, Yue Li, Hui Ministry of Edu. Key Lab. of Computer Network and Information Security Xidian University Xi'an China Xi'an Branch Shaanxi Telecom Ltd. Xi'an China

ISBN: (纸本)9780769545790

Abuse-freeness is one of the most interesting new problems in the electronic payment security today. It is an effective supplementary for the fairness. It is confused for researchers how to get real abuse-freeness in electronic payment. An abuse-freeness electronic payment protocol for real goods is proposed in this paper. The protocol has the abuse-freeness by introducing a trusted third party and using the concurrent signature and it has prevented both sides in payment to originate and terminate protocol maliciously. At the same time fairness and security are also achieved in the proposed protocol. © 2011 IEEE.

关键词： Contracts Equations Forgery Manuals Process control Protocols security abuse-freeness abuse-freeness electronic payment protocol concurrent signature concurrent signature digital signatures electronic money electronic payment protocol electronic payment security trusted third party trusted third party (TTP)

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Forward secure proxy blind signature scheme

Forward secure proxy blind signature scheme

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3rd IEEE International Conference on Intelligent networking and Collab.rativeSystems, INCoS 2011

作者： Fan, Kai Wang, Yue Li, Hui Ministry of Edu. Key Lab. of Computer Network and Information Security Xidian University Xi'an China Xi'an Branch Shaanxi Telecom Ltd. Xi'an China

ISBN: (纸本)9780769545790

There is no forward security in any proxy blind signature schemes today. The lack of forward security will impact the system security tremendously if the key is stolen. To avoid such a security problem this paper proposes a forward secure proxy blind signature scheme which employs the key evolution mechanism in a newly proposed proxy blind signature scheme. The security of proxy blind signature and the forward security are both analyzed in the proposed scheme. Even if the current signature key is compromised, the attacker cannot forge signatures as if they had been generated before the key leakage. That is to say, signatures signed before the leakage are still valid. © 2011 IEEE.

关键词： Authentication

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A new abuse-free fair electronic payment protocol

A new abuse-free fair electronic payment protocol

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5th International Conference on infor.ation Assurance and security, IAS 2009

作者： Fan, Kai Wang, Yue Li, Hui Ministry of Edu. Key Lab. of Computer Network and Information Security Xidian University Xi'an Shaanxi China Xi'an Branch of Shaanxi Telecom Ltd. Xi'an Shaanxi China

ISBN: (纸本)9780769537443

To solve the problem of the abuse in electronic payment protocols, a new abuse-free fair electronic payment protocol is proposed in this paper. The proposed protocol solves the problems in Parks' protocol and furthermore it solves the abuse using off-line trusted third party (TTP). The security and fairness are also possessed in the protocol. © 2009 IEEE.

关键词： Parks

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security analysis of the kerberos protocol using BAN logic

Security analysis of the kerberos protocol using BAN logic

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5th International Conference on infor.ation Assurance and security, IAS 2009

作者： Fan, Kai Li, Hui Wang, Yue Ministry of Edu. Key Lab. of Computer Network and Information Security Xidian University Xi'an Shaanxi China Xi'an Branch of Shaanxi Telecom Ltd. Xi'an Shaanxi China

ISBN: (纸本)9780769537443

Kerberos protocol is a famous identity authentication protocol and it is widely used in the network as a standard. But there is still not a strict proof of it base on the Formal method. That is very nervous for the users. So a security analysis of the Kerberos protocol using BAN logic is proposed in this paper, and the reliability, practicability and security of Kerberos protocol are proved. © 2009 IEEE.

关键词： Formal methods

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A delay guaranteed and services differentiated MAC protocol based on location and reservation in near-space

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Journal of Convergence infor.ation Technology 2011年第2期6卷 120-130页

作者： Chen, Chen Gao, Xinbo Pei, Qingqi National Key Lab. of Integrated Service Networks Xidian Univ Xi'an 710071 China School of Electronic Engineering Xidian Univ Xi'an 710071 China Ministry of Edu. Key Lab. of Computer Network and Information Security Xidian Univ Xi'an 710071 China

With an ever-increasing interests and demands in Near-Space, more and more researchers have put their attentions on this field, leading to an emerging needs for modeling the 20-100km altitude space especially for broadband communications. Among the lots of works, Media Access Control (MAC) undoubtedly has chief importance and urgency with which communicating objects or nodes can effectively access to Near-Space. However, previous MAC designs mainly focus their attentions on service differentiation by application purposes without considering nodal mobility. In fact, access control for nodes with different mobility levels has significantly influences to MAC performance and is complex and difficult to be implemented together with present MAC protocols. In this paper, we first presented a location method for Near-Space vehicles such as airships and unmanned planes and then modeled the mobile networks infrastructure with mobility considered. For determining the vehicles joining/leaving events locally, we quantify the communication range with Received Signal Strength Indicator (RSSI) aid. Then, for better managing the nodes access to the Near-Space with aforementioned works, we designed a TDMA based reservation MAC protocol to guarantee the servicedelay and networks coverage with best efforts. Simulation results showed that our proposed model better fit for Near-Space mobile communication environments and presented a lower delay and higher coverage regarding to different mobility levels.

关键词： Medium access control

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