An encryption and decryption system and working method based on sm2 and rsa encryption algorithms

Abstract

The invention discloses an encryption and decryption system and working method based on SM2 and RSA encryption algorithms. The system includes a CPU interface module, a main control module connected to the CPU interface module, and multipliers respectively connected to the main control module module, adder module, modular operation module, dot multiplication operation module, modular exponentiation operation module, random number generation module, and key generation module. In this system, modular control is adopted, and by sharing the multiplier, adder module and part of the registers that consume the larger circuit area used by SM2 and RSA operations, the circuit of this scheme is more costly than implementing the two encryption algorithms alone. The circuit area and logic resources consumed are less; at the same time, the method of mixing SM2 and RSA encryption algorithms is used for encryption and decryption operations, which greatly enhances the security and confidentiality of the encryption and decryption system.

Description

technical field [0001] The invention relates to the technical field of cryptographic chips, in particular to an encryption and decryption system and working method based on SM2 and RSA encryption algorithms. Background technique [0002] With the rapid development of computers and the Internet, the ways and means for people to transmit information have been greatly changed. A large amount of sensitive information is often exchanged through public communication facilities or the Internet. Cryptography technology is the leading force to ensure information security. The research and application of cryptographic algorithms is the core research field of information security technology. [0003] The RSA public key encryption algorithm was developed by Ron Rivest, Adi Shamirh and Len Adleman at the Massachusetts Institute of Technology in 1977. The RSA algorithm is the first algorithm that can be used for encryption and digital signature at the same time, and it is also easy to un...

AI Technical Summary

Problems solved by technology

[0006] The core of the RSA public key encryption algorithm is a large number modular exponentiation operation, and the core of the SM2 public key encryption algorithm is an elliptic curve point multiplication operation; because the calculation steps of both the RSA and SM2 encryption algorithms are very complicated, most current encryption systems Both of them only implement one of the encryption algorithms, but it is difficult to compromise the calculation speed and the area of ​​the encryption system in a system that can implement two encryption algorithms at the same time.

That is to say, in the existing systems that can realize the two encryption algorithms of RSA and SM2, the area of ​​the system design is relatively large and the cost is relatively high

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