At present,the Internet of Things(IoT)is rapidly expanding.However,due to lack of sufficient security and privacy measures,its sustainable development is greatly affected,so the research of lightweight block cipher has attracted great attention in the field of cryptography.In this paper,we propose a new lightweight block cipher with a new design of P-Permutation operation named LRP,which is designed to allow lightweight and fast implementation of cryptographic algorithms.Although many cryptographic algorithms are designed employing traditional SPN structure,LRP is designed adopting the branched SPN structure.Compared with the traditional lightweight block cipher algorithm,the whole algorithm is designed with a novel permutation layer and key expansion algorithm.Adopting novel design and implementation techniques,LRP achieves both high security and compact implementation in hardware.In our smallest implementation,the hardware requirements for the 96-bit key mode are only 2480 gate equivalents.We show that LRP offers a sufficient security level against known analyses including recent differential attacks and linear attacks and so on.
lightweight block cipherInternet of Thingsbranched SPN structure
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