Sender-Side Public Key Deniable Encryption Scheme

Consider a situation in which the transmission of encrypted message is intercepted by an adversary who can later ask the sender to reveal the random choices (and also the secret key, if one exists) used in generating the cipher text, thereby exposing the plaintext. An encryption scheme is deniable if the sender can generate `fake random choice´ that will make the cipher text `look like´ an encryption of a different plaintext, thus keeping the real plaintext private. Analogous requirements can be formulated with respect to attacking the receiver and with respect to attacking both parties. In this paper we propose a scheme for the sender side deniable encryption.