Implementation method of novel lightweight block cipher CORL

Abstract

The invention discloses an implementation method of a novel lightweight block cipher CORL. According to the method, a novel generalized Feistel network structure is designed, the structural algorithmoptimizes the defect that a round of iterative operation of a traditional Feistel network structure only changes a half of data packet data, and achieves an effect that three fourths of packet data ischanged through a round of iteration. An algorithm round function comprises an F function, and the conversion process of the F function sequentially comprises row shifting, round key addition, S boxreplacement, row shifting and column confusion. The algorithm structure is convenient for software and hardware realization, the algorithm decryption basically multiplexes the encryption module, decryption can be performed only by adding some control signals, the operation is simple, and decryption is realized without consuming more resources. Compared with the current block cipher, the occupied resource is small, the encryption performance is high, and the known attack can be resisted.

Description

technical field [0001] The invention designs a method for realizing a novel lightweight block cipher CORL. Background technique [0002] The block cipher algorithm is an algorithm that uses the same key for encryption and decryption. In essence, the block cipher algorithm is a finite iterative permutation transformation with a key. ciphertext. The block cipher algorithm has the characteristics of fast speed, standardization and easy hardware and software implementation. It has always been an encryption scheme under resource constraints. As the core cipher in information security, block cipher has a wide range of applications in the field of Internet of Things application security. [0003] In recent years, with the rapid development of Internet of Things technology, wireless sensors (WSN) and radio frequency (RFID) are more and more widely used. These devices have hardware manufacturing, low maintenance costs, network robustness, strong self-organization, and wide applicab...

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Problems solved by technology

[0006] The present invention provides a novel light-weight and high-efficiency block cipher CORL implementation method, and its purpose is to overcome the following problems in the prior art light-weight block cipher algorithm: Feistel network structure algorithm, diffusion ability is relatively weak; algorithm decryption process It is more complex and requires a lot of additional resources to implement decryption; lightweight block ciphers still occupy too many resources, have low encryption performance and are vulnerable to attacks

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