Publication

Abstract : Lattice-based cryptography plays a very important role in authentication and key exchanges that protects against the threat of quantum attacks. However, it is not easy to design quantum resistant password-based protocol due to the high demand for security requirements and the limited resources nature of mobile devices. In this article, we have proposed a novel post-quantum key exchange based on a variant of lattice assumption, the ring learning errors. This protocol uses better unbiased Piekert’s reconciliation with respect to even q, but reconciliation in Ding’s protocol is biased. This protocol ensures both authentication and key agreement. This protocol needs just two messages in exchange for authentication and key agreement. This protocol ensures both security against quantum attacks and efficiency due to simple algebraic operations that are polynomial addition and multiplications.