Efficient Lattice-Based Signcryption in Standard Model

Abstract EN

Signcryption is a cryptographic primitive that can perform digital signature and public encryption simultaneously at a significantly reduced cost.

This advantage makes it highly useful in many applications.

However, most existing signcryption schemes are seriously challenged by the booming of quantumcomputations.

As an interesting stepping stone in the post-quantum cryptographic community, two lattice-basedsigncryption schemes were proposed recently.

But both of them were merely proved to be secure inthe random oracle models.

Therefore, the main contribution of this paper is to propose a new lattice-basedsigncryption scheme that can be proved to be secure in the standard model.