Construction of Subliminal Channel in Digital Signature Scheme

Abstract

Subliminal channel is proposed by Simmons, he showed a method that a message authentication without secrecy channel transferring secret message. Subsequently, subliminal channel is implemented in ElGamal, DSA which based on the difficulty of discrete logarithms. Zero-knowledge proof is an important tool in cryptology, a digital signature scheme based on zero-knowledge proof or “cut and chose” is regarded as resist subliminal channel. The possibility of constructing subliminal channel in these digital signature scheme is analyzed, the security and application of subliminal channel is discussed also.