FLC: A New Secure and Efficient SPN-Based Scheme for Block Ciphers

Abstract

The FLC scheme was proposed and analyzed the theoretic security in [1]. In this paper, We add the practically secure proofs of a structure based on FLC against the linear and differential cryptanalysis. Then, we propose the MDS matrices to implement this structure with two 128-bit/256-bit block sizes. Finally, we evaluate the above experimental results and compare them with several implementations of the well-known block ciphers. These results show that FLC is indeed a prospective scheme for post-quantum cryptography.