Subliminal channel protocol to the elliptic curve signature algorithm

How to establish and prevent the subliminal channel in the digital signature algorithm is an important problem in information security.The ECDSA(Elliptic Curve Digital Signature Algorithm),a subliminal channel protocol and its resistant scheme are put forward.This protocol can pass one bit subliminal information during a signature process.The protocal can be widely used in digital signiture protocal based on DSA(Digital Signature Algorithm).