A latch PUF-based anti-side channel attack DES protection method and circuit

Abstract

The invention discloses an anti-side-channel-attack DES protection method and circuit based on a Latch PUF. The method specifically comprises the steps of generating initial parameters, two-dimensional auxiliary replacement vectors and one-dimensional auxiliary replacement tables, and carrying out DES mask preparation, mask S box replacement, mask release and mask post-operation. The circuit comprises a DES basic module, a true random number generator (TRNG) based on the Latch PUF, a two-dimensional auxiliary replacement table P based on an ROM (Read Only Memory), S1 to S8 boxes based on the ROM, one-dimensional auxiliary replacement tables T1 to T8 based on an RAM (Random Access Memory), an initialization module, a mask S box replacement module, a circulation counter and a mask release module. According to the method and the circuit, various side-channel leakage information in a DES encryption process can be greatly reduced, so that an attacker is difficult to correctly obtain a secret key used when a DES is encrypted.

Description

technical field [0001] The invention relates to a Latch PUF-based anti-side channel attack DES protection method and circuit, belonging to the technical field of information security. Background technique [0002] In the information society, cryptographic technology is used in all aspects of people, and is often used to provide confidential information, that is, to protect transmitted and stored information. Cryptography technology can also be used for message signature, identity authentication, system control, information source, etc. It is an important technology related to the development and progress of human society. While cryptography has been developed, the corresponding cryptanalysis has also made great progress. In reality, the design security of a cryptographic algorithm is not limited to the security of the algorithm itself, but also includes the security of its physical entity—the cryptographic chip. When the cryptographic chip is working, a lot of additional i...

AI Technical Summary

Problems solved by technology

However, due to the common problems of poor computing power and limited resources in such entities, there are great obstacles in the application of traditional cryptography-based authentication methods.

Images