Subliminal Channel and Digital Currency Pay Security

This paper constructs a subliminal channel model suitable for payment of safe digital currency.On the basis of the study of the E1Gamal digital signature scheme, the wide-band subliminal channel and the narrow-band subliminal channel are studied, the security of these two subliminal channels in digital currency payment is analyzed theoretically,it is concluded that I - type wide-band subliminal channel can be used for the mutual trust of the two parties in the transaction, while II type narrow-band subliminal channel can effectively prevent the risk of forged signature.On the basis of this, this paper proposes a method to construct the subliminal channel based on tripartite payment method, and its security is verified theoretically.