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one-way hash function based on hyper-chaotic cellular neural network

Chinese Physics B 2008年第7期17卷 2388-2393页

作者：杨群亭高铁杠 College of Software Nankai University

The design of an efficient one-way hash function with good performance is a hot spot in modern cryptography researches. In this paper, a hash function construction method based on cell neural network with hyper-chaos characteristics is proposed. First, the chaos sequence is gotten by iterating cellular neural network with Runge Kutta algorithm, and then the chaos sequence is iterated with the message. The hash code is obtained through the corre- sponding transform of the latter chaos sequence. Simulation and analysis demonstrate that the new method has the merit of convenience, high sensitivity to initial values, good hash performance, especially the strong stability.

关键词： one-way hash function hyper-chaos cellular neural network Runge Kutta formula

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An efficient hash-based authenticated key agreement scheme for multi-server architecture resilient to key compromise impersonation

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Digital Communications and Networks 2021年第1期7卷 140-150页

作者： Inam ul haq Jian Wang Youwen Zhu Saad Maqbool College of Computer Science and Technology Nanjing University o f Aeronautics and AstronauticsNanjing210016China National University of Science and Technology Islamabad4600Pakistan

During the past decade,rapid advances in wireless communication technologies have made it possible for users to access desired services using hand-held devices.Service providers have hosted multiple servers to ensure seamless online services to end-users.To ensure the security of this online communication,researchers have proposed several multi-server authentication schemes incorporating various cryptographic primitives.Due to the low power and computational capacities of mobile devices,the hash-based multi-server authenticated key agreement schemes with offline Registration Server(RS)are the most efficient choice.Recently,Kumar-Om presented such a scheme and proved its security against all renowned attacks.However,we find that their scheme bears an incorrect login phase,and is unsafe to the trace attack,the Session-Specific Temporary Information Attack(SSTIA),and the Key Compromise Impersonation Attack(KCIA).In fact,all of the existing multi-server authentication schemes(hash-based with offline RS)do not withstand KCLA.To deal with this situation,we propose an improved hash-based multi-server authentication scheme(with offline RS).We analyze the security of the proposed scheme under the random oracle model and use the t4Automated Validation of Internet Security Protocols and Applications''(AVISPA)tool.The comparative analysis of communication overhead and computational complexity metrics shows the efficiency of the proposed scheme.

关键词： Multi-server architecture Authenticated key agreement Registration server one-way hash function Key compromise impersonation

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Analysis and Improvement on a hash-Based Authentication Scheme for Multi-Server Architecture

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Wuhan University Journal of Natural Sciences 2021年第5期26卷 394-404页

作者： LI Rui KANG Baoyuan MAI Kaiqiang School of Computer Science and Technology Tiangong UniversityTianjin 300387China

In order to meet people’s demand for various types of network services,researchers have conducted extensive research on authentication schemes for multi-server architecture.Although various schemes have been proposed,most of them still have safety defects and fail to meet safety requirements.Recently,Haq et al presented an efficient hash-based authenticated key agreement scheme for multi-server scheme and claimed that their scheme can withstand all well-known attacks.However,we find that their scheme is vulnerable to replay attack,tracking attack and malicious server impersonation user attack.Then we propose an improved scheme.We also analyze the security of the improved scheme and compare with Haq et al’s scheme in security and computational efficiency.Furthermore,we use the AVISPA(Automated Validation of Internet Security Protocols and Applications)tool to verify the security of the improved scheme.

关键词： multi-server architecture authentication security one-way hash function AVISPA

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