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Threshold Signature Scheme with subliminal channel

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Threshold Signature Scheme with Subliminal Channel

subliminal channels in the NTRU and the subliminal-Free Methods

2009中国控制与决策会议

作者： Xuanwu Zhou,Ping Wei Key Laboratory of Network & Information Security of the APF,Engineering College of the APF,Xi’an 710086,P.R.China

Threshold signature is an important signature with additional property;it can achieve effective supervision on signature generating and signature *** paper analyzed the basic principles of threshold cryptosystem and its superiority for application in threshold signature *** the security threats and system flaws of present signature schemes,we present a threshold signature scheme based on elliptic curves *** scheme achieves threshold generating and verifying of signature by utilizing secret sharing in signature processing,and it also achieves threshold management of identity tracing by identity blinding and probabilistic encryption *** security proof for the scheme,we present a typical subliminal channel scheme for the threshold *** subliminal message can only be generated and recovered by no less than t valid members;so the subliminal channel renders effective supervision on subliminal message and identity *** analyses and comparison also justify the brevity,security and high efficiency of the scheme.

关键词： Threshold signature threshold generating and verifying subliminal channel identity supervision system efficiency

来源： cnki会议评论

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1541-1544页

作者： CAI Qingjun ZHANG Yuli School of Mathematics and Information Sciences Guangzhou University Guangzhou 510006 Guangdong China

The construetion and destruction of subliminal channel are important problems in the information hiding. The subliminal channel can send secret information without notice. Two subliminal-free methods named weak （strong） subliminal-free on public-key cryptosystem （PKC） are proposed in this paper using the combinatorial method. The first method can only free the subliminal information with any minor probability and the second can free all. Moreover, the ＂traitor problem＂ which is same as the model of the subliminal channel in PKC is given. Two subliminal channels are embedded in N-th degree truncated polynomial ring （NTRU） cryptosystem, and their subliminal-free methods are also be obtained by the action of surveillant.

关键词： N-th degree truncated polynomial ring (NTRU) cryptosystem subliminal channel subliminal-free

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Blockchain-based immunization against kleptographic attacks

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Science China(Information Sciences) 2024年第7期67卷 172-183页

作者： Changsong JIANG Chunxiang XU Jie CHEN Kefei CHEN School of Computer Science and Engineering University of Electronic Science and Technology of China Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Department of Mathematics Hangzhou Normal University

Adversarial implementations of cryptographic primitives called kleptographic attacks cause the leakage of secret information. subliminal channel attacks are one of the kleptographic attacks. In such attacks, backdoors are embedded in implementations of randomized algorithms to elaborately control randomness generation, such that the secrets will be leaked from biased outputs. To thwart subliminal channel attacks, double-splitting is a feasible solution, which splits the randomness generator of a randomized algorithm into two independent generators. In this paper, we instantiate double-splitting to propose a secure randomness generation algorithm dubbed SRG using two physically independent generators: ordinary and public randomness generators. Based on public blockchains, we construct the public randomness generator,which can be verified publicly. Hashes of a sufficient number of consecutive blocks that are newly confirmed on a blockchain are used to produce public randomness. In SRG, outputs from the two generators are taken as inputs of an immunization function. SRG accomplishes immunization against subliminal channel ***, we discuss the application strategies of SRG for symmetric and public-key encryption.

关键词： kleptographic attacks subliminal channel blockchain immunization randomized algorithm

A NOVEL APPROACH OF SECURE COMMUNICATION BASED ON THE TECHNIQUE OF SPEECH INFORMATION HIDING

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Journal of Electronics(China) 2006年第2期23卷 304-309页

作者： Wu Zhijun Duan Haixin Li Xing Network Research Center Tsinghua University Beijing 100084 China Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China Tianjin 300300 China

The proposed secure communication approach adopts the proposed algorithm of Analysis-By- Synthesis （ABS） speech information hiding to establish a Secret Speech Subliminai channel （SSSC） for speech secure communication over PSTN （Public Switched Telephone Network）, and employs the algorithm of ABS speech information extracting to recovery the secret information, This approach is more reliable, covert and securable than traditional and chaotic secure communication.

关键词： Secure communication Speech Information hiding subliminal channel Analysis-By-Synthesis(ABS)

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