Abstract
The subliminal channel is used to send a secret message to an authorized receiver; the message cannot be discovered by any unauthorized receivers. Designated verifier signature(DVS) provide authentication of a message, we design a DVS scheme with message recovery mechanism and use it as a subliminal channel. In order to share a message among n users securely and allows t or more users can reconstruct the secret in dynamic groups, we combine both subliminal channel and (t, n) threshold cryptography. Then we proposed a threshold subliminal channel which can convey a subliminal message to a group of users based on message-recovery designated verifier signatures. Reconstructing the subliminal message relies on the cooperation oft or more users in the group and they can verify the validity of the subliminal message. Security and performance analysis show that the proposed scheme is secure and efficient.
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Foundation item: Supported by the National Natural Science Foundation of China (60403027)
Biography: SU Li(1981-), male, Ph. D. candidate, research direction: network security and digital signature.
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Li, S., Guohua, C., Muxiang, Y. et al. Threshold subliminal channel based on designated verifier signature. Wuhan Univ. J. Nat. Sci. 11, 1485–1488 (2006). https://doi.org/10.1007/BF02831803
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DOI: https://doi.org/10.1007/BF02831803