Block cipher encryption and decryption method

Abstract

The invention provides a block cipher encryption and decryption method belonging to the field of data encryption and decryption. The algorithm of the invention designs a symmetric encryption structure, especially the S-box design in the invention can configure S transformation required for encryption and S inverse transformation required for decryption without additional circuit resources, thereby being beneficial to the implementation of an encryption / decryption integrated hardware circuit and consuming fewer area resources compared with the AES (advanced encryption standard) encryption / decryption integrated circuit. The complicated S box structure of the algorithm can resist the traditional known attack methods. In case of a small number of encryption rounds (three rounds), a high encryption speed can be provided, and decryption can be carried out at the same speed by using the same encryption and decryption hardware. The algorithm is especially suitable for realizing an ASIC (application specific integrated circuit), and can realize an ASIC chip based on the encryption and decryption special-purpose algorithm. Besides, the invention can be also used for the design of IP cores on FPGA (field programmable gate array). Compared with the AES algorithm, the invention consumes fewer resources on FPGA and has higher speed.

Description

technical field [0001] The invention belongs to the field of data encryption and decryption, in particular to a high-throughput data encryption algorithm. Background technique [0002] Under the condition of large-scale data with high throughput rate, such as communication in aviation, it is necessary to transmit massive data, which is usually transmitted wirelessly at high frequency and ultra-high frequency. Data is easy to obtain and requires higher encryption security. [0003] The AES algorithm is the most popular block encryption algorithm today, which has been analyzed by many parties and is widely used all over the world. The disadvantage of the AES algorithm is that there are too many round changes, and reducing the number of round changes will lead to reduced security and cannot meet high-speed requirements. The encryption algorithm and decryption algorithm of the AES algorithm are different. Only part of the circuit can be reconfigured, and the circuit resource c...

AI Technical Summary

Problems solved by technology

The disadvantage of the AES algorithm is that there are too many round changes, and reducing the number of round changes will lead to reduced security and cannot meet high-speed requirements

However, the encryption algorithm and decryption algorithm of the AES algorithm are different. Only part of the circuit can be reconfigured, and the circuit resource consumption of the encryption and decryption is about 20% more than that of the only encryption circuit.

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