The construction and research of lightweight cryptography SOPT-S boxes based on the inverse mapping in galois field

Abstract

As the weakness like poor performance in cryptology and single type in the utility of the S boxes in nonlinear layer of the existing lightweight cryptography algorithm such as PRESENT, LED and KLEIN, the safety of algorithm in sensor nodes meet a notable decrease, which brings huge difficulties to information protection of sensor nodes in city security defense and to decryption resisting of military sensor networks. This paper constructs a new lightweight S boxes based on the inverse mapping in Galois field which called Suboptimal-S boxes (SOPT-S boxes) with excellent performance in cryptology. It is shown that the SOPT-S boxes perform better in cryptographic properties such as differential uniformity, algebraic degree and avalanche effect than PRESENT, of which the algebraic degree achieves to n-1; avalanche effect to 1/2 and both of them achieve to the best, besides, it has an equivalent nonlinearity compared with PRESENT, so that it can provide a reference for the designing of nonlinear layer of lightweight cryptography algorithm.