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2007 International Conference on Computational Intelligence and security, CIS'07

作者： Weihong, Fu Xiaoniu, Yang Naian, Liu State Key Lab. of Integrated Service Networks Xidian University Xi'an 710071 China National Laboratory of Information Control Technology for Communication System Jiaxing Zhejiang 31403 China

ISBN: (纸本)0769530729

Aiming at the problem of blind source separation of the communication signals, we propose a step size optimization equivariant adaptive source separation via independence (SO-EASI) algorithm basing on the EASI block based algorithm. This algorithm adjusts the step-size by the steepest descent method and thereby greatly increases its convergence speed whatever value the step-size is initialized. Simulation results show that SO-EASI algorithm can effectively blindly separate the communication signals and these results also support the expected improvement in convergence speed of the approach. © 2007 IEEE.

关键词： Blind source separation

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Wireless authentication scheme providing perfect forward secrecy and user anonymity

Wireless authentication scheme providing perfect forward sec...

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GMC'2006: 2006 Global Mobile Congress

作者： Wei, Yongzhuang Qiu, Hongbing Hu, Yupu Department of Communication and Information Engineering Guilin University of Electronic Technology Guilin 541004 China Information Security and Privacy Institute ISN National Key Lab. Xidian University xi'an 710071 China

In this paper, we present an efficient authentication scheme with providing perfect forward secrecy and mobile user anonymity in wireless environment. When a mobile user and his visited network mutually authenticate each other, the anonymity of user should be preserved because of user's privacy. In order to provide user anonymity, we introduce a new method of computing the session keys by basing on smart card. In our protocol, it takes only one round of message exchange between the mobile user and the visited network. The most significant feature is that enables perfect forward secrecy to the user identity and the session keys that established by the mobile user, the visited network and the corresponding home network.

关键词： security of data

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security analysis of authentication scheme with anonymity for wireless environments

Security analysis of authentication scheme with anonymity fo...

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2006 International Conference on communication technology, ICCT '06

作者： Yongzhuang, Wei Hongbing, Qiu Hu, Yupu Department of Communication and Information Engineering Guilin University of Electronic Technology Guilin Guangxi China Information Security and Privacy Institute ISN National Key Lab. Xidian University Xi'an Shanxi China

ISBN: (纸本)1424408016

Authentication is the most essential procedure to ensure that the service is properly used for wireless environments. Recently, Zhu and Ma proposed a novel authentication scheme with anonymity for wireless environments by basing on the hash functions and smart card, and mobile users only do symmetric encryption and decryption. And they claimed that their new scheme is security and provide user anonymity and so on. However, in this paper, we show that Zhu-Ma's new authentication scheme don't satisfy anonymity and untractability. Moreover, we still show that the authentication scheme is insecure when the mobile nodes' smart card leaked relative information. Accordingly, we present an improvement anonymous authentication scheme for wireless environments and the performance of our scheme is also analyzed.

关键词： security of data

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Access control model for P2P file-sharing systems based on trust and recommendation

Access control model for P2P file-sharing systems based on t...

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2006 2nd International Conference on Semantics Knowledge and Grid, SKG

作者： Yue, Guang-Xue Yu, Fei Chen, Yi-Jun Wu, Rong-Hui An, Ji-Yao Li, Ren-Fa College of Information Engineering JiaXing University JiaXing 314000 China State Key Lab. for Novel Software Technology Nanjing University Nanjing 210093 China State Key Laboratory of Information Security Graduate School Chinese Academy of Sciences Beijing 100049 China School of Computer and Communication Hunan University Changsha 410082 China

ISBN: (纸本)0769532055

The decentralized and anonymous characteristics of P2P environments make the task of controlling access to sharing information more difficult, which cannot be done by traditional access control methods. In this paper, the access control requirements in such environments were identified, and an access control model for P2P file-sharing systems based on trust and recommendation was proposed. The model integrates aspects of trust and recommendation, fairness based participation schemes and access control schemes. © 2006 IEEE.

关键词： Peer to peer networks

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security Analysis of Timestamp-based Remote User Authentication Scheme Using Smart Cards

Security Analysis of Timestamp-based Remote User Authenticat...

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2006 International Conference on communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)

作者： Yong-Zhuang Wei Yu-Pu Hu Department of Communication and Information Engineering Guilin University of Electronic TechnologyG Information Security & Privacy Institute ISN National Key Lab.Xidian UniversityXi'an Shaanxi Ch

recently, Shen, Lin, and Hwang proposed a modified Yang-Shieh`s password authentication scheme to enhance security. In 2004,Yang and Chen et al. point out that Shen-Lin-Hwang`s scheme was vulnerable to the forged login attack. Later, Wang and Li present a new efficient timestampbased remote user authentication scheme via further modified Shen-Lin-Hwan`s scheme. And they also claimed that their new modified scheme could withstand the forged login attack. However, in this paper, we show that the Yang and Li`s improvement scheme is still vulnerable to the reflection attack, and propose our improvement scheme.

关键词： Authentication Smart cards information security Electronic mail Reflection information analysis Privacy National security Cryptography Resists

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Impossible Differential Cryptanalysis for SPN Cipher Structure and Advanced Encryption Standard

Impossible Differential Cryptanalysis for SPN Cipher Structu...

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2006 International Conference on communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)

作者： Yongzhuang Wei Jie Chen Yupu Hu Department of communication and Information Engineering Guilin University of Electronic TechnologyG Information Security & Privacy Institute ISN National Key Lab. Xidian University Xi'an Shaanxi Ch National Laboratory for Modern Communications Chengdu Sichuan China

In this correspondence, we examine the security of block ciphers referred to as substitution-permutation networks (SPN) by considering the impossible differential characteristics of given S-boxes. When the SPN has 2-round, we obtain a new upper bound on the maximum impossible differential probability MIDP. Moreover, when using a recursive technique, we obtain a general result for the MIDP of r (r≥8) rounds SPN ciphers. Furthermore, when our result applies to r (r≥8) rounds AES, It is shown that the upper bound of MIDP is up to 1, which means AES may be existence of characteristics with differential probability 0 in high rounds.

关键词： Cryptography Upper bound Electronic mail information security lab.ratories National security Privacy Art

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Design and analysis of a self-tuning proportional and integral controller for active queue management routers to support TCP flows

Design and analysis of a self-tuning proportional and integr...

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INFOCOM 2006: 25th IEEE International Conference on Computer communications

作者： Xiong, Naixue Défago, Xavier Jia, Xiaohua Yan, G. He, Yanxiang School of Information Science Japan Advanced Institute of Science and Technology State Key Lab. of Software Engineering Computer School Wuhan University School of Information Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan Kowloon Hong Kong IEEE IEEE Communication Society Department of Computer Science Wuhan University City University of Hong Kong Kowloon Hong Kong School of Computer Science and Technology Wuhan University of Science and Technology China SMIEEE

ISBN: (纸本)1424402212

Active Queue Management (AQM) is an effective method used in Internet routers for congestion control, and to achieve a tradeoff between link utilization and delay. The de facto standard, the Random Early Detection (RED) AQM scheme, and most of its variants use average queue length as a congestion indicator to trigger packet dropping. This paper proposes a novel AQM algorithm, called Self-tuning Proportional and Integral RED (SPI-RED), as an extension of RED. SPI-RED is based on a Self-tuning Proportional and Integral controller, which not only considers the average queue length at the current time point, but also takes into consideration the past average queue lengths during a round-trip time. Furthermore, we give theoretical analysis of the system stability and give guidelines for the selection of feedback gains for the TCP/RED system to stabilize the average queue length at a desirable level. Extensive simulations have been conducted with ns2. The simulation results have demonstrated that the proposed SPI-RED algorithm outperforms the existing AQM schemes in terms of drop probability and stability.

关键词： Queueing networks

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Access control Model for P2P File-Sharing Systems Based on Trust and Recommendation

Access Control Model for P2P File-Sharing Systems Based on T...

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International Conference on Semantics, Knowledge and Grid (SKG)

作者： Guang-xue Yue Guang-xue Yue Fei Yu Fei Yu Yi-jun Chen Yi-jun Chen Rong-hui Wu Rong-hui Wu Ji-yao An Ji-yao An Ren-fa Li Ren-fa Li College of Information Engineering JiaXing University JiaXing China State Key Lab. for Novel Software Technology Nanjing University Nanjing China School of Computer & Communication Hunan University Changsha China

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Multi-homed VPN architecture based on extended SOCKS+TLS protocols

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Journal of Shanghai Jiaotong University (Science) 2005年第3期10 E卷 250-255页

作者： Zhang, Bao-Liang Hu, Han-Ping Chen, Xiang State Education Ministry Key Lab. of Image Information and Intelligent Control Inst. of Pattern Recognition and Artificial Intelligence Huazhong Univ. of Science and Technology Wuhan 430074 China

A multi-homed VPN architecture based on extended SOCKSv5 and TLS was proposed. The architecture employs a dynamic connection mechanism for multiple proxies in the end system, in which the security-demanded transmission connections can switch smoothly among the multiple proxies by maintaining a coherent connection context. The mechanism is transparent to application programs and can support the building of VPN. With the cooperation of some other security components, the mechanism guarantees the resource availab.lity and reliability of the end system against some attacks to the specific ports or hosts.

关键词： Virtual reality

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A Multi-homed VPN Architecture Based on Extended SOCKS+TLS Protocols

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Journal of Shanghai Jiaotong university(Science) 2005年第3期10卷 250-255页

作者：张宝良胡汉平陈翔 State Education Ministry Key Lab. of Image Information & Intelligent Control In st. of Pattern Recognition & Artificial Intelligence Huazhong Univ. of Science & Technology Wuhan 430074 China

A multi-homed VPN architecture based on extended SOCKSv5 and TLS was proposed. The architecture employs a dynamic connection mechanism for multiple proxies in the end system,i n which the security-demanded transmission connections can switch smoothly among the multiple proxies by maint aining a coherent connection *** mechanism is transparent to application programs and can support th e building of *** the cooperation of some other security components,the mechanism guarantees the reso urce availab.lity and reliability of the end system against some attacks to the specific ports or hosts.

关键词： multi-homed SOCKSv5 security connection context virtual private network （VPN）

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