Abstract
The article proposes a novel construction of sign-cryption scheme with provable security which is most suited to be implement on smart card. It is secure in random oracle model and the security relies on Decisional Bilinear Diffie-Hellmann Problem. The proposed scheme is secure against adaptive chosen ciphertext attack (indistiguishbility) and adaptive chosen message attack (unforgeability). The scheme have the security properties anonymity and forward security. Also it is inspired by zero-knowledge proof and is publicly verifiable. The scheme has applied for mutual authentication to authenticate identity of smart card's user and reader via Application protocol Data units. This can be achieved by the verification of the signature of the proposed scheme. Also the sensitive information are stored in the form of ciphertext in Read Only Memory of smart cards. These functions are performed in one logical step at a low computational cost.