Enhanced MASK code method for resisting DES (data encryption standard) power consumption attack

Abstract

The invention relates to an enhanced MASK code method for resisting DES (data encryption standard) power consumption attack, comprising the steps as follows: step 1, realizing two rounds of DES (data encryption standard) calculations with a pipeline operation mode, realizing a calculating circuit by means of a first calculating circuit and a second calculating circuit which are mutually independent and isolated; step 2, realizing the DES (data encryption standard) calculation processes from the third round to the fourteenth round by means of a random positioning logical operation mode; step 3, realizing the last two rounds of DES (data encryption standard) calculations by means of a pipeline operation mode, and realizing the calculating circuit by means of a third calculating circuit and a fourth calculating circuit which are mutually independent and isolated, wherein each round of the DES (data encryption standard) calculations in step 1 to 3 is calculated with a MASK code method. The method provided by the invention not only reduces the design area of the chip, but also completely solves the problem in the prior art in which the two adjacent rounds of the MASK code solutions have a Hamming distance leakage, and keeps the sensitive information between wheels from leakage, and simultaneously keeps the Hamming distance and other sensitive information between two adjacentwheels from leakage, and effectively resists the power consumption attack.

Description

Technical field [0001] The invention relates to an enhanced MASK masking method, in particular to an enhanced masking method against DES (Data Encryption Standard) power consumption attacks, belonging to the technical field of information security chip design, and can be widely used in high security The encryption computing equipment. Background technique [0002] With the continuous popularization of the Internet and the increasing degree of social informatization, the importance of information security has gradually emerged. As one of the most powerful weapons in information security, encryption is playing an important role. The DES encryption algorithm became an encryption standard in the 1970s and has undergone a long-term test. [0003] Any security product or cryptographic system must face a problem of how to defend against attacks and prying eyes. In recent years, a new powerful attack method has emerged, which is called a side-channel attack (SCA). Bypass attack refers t...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide an enhanced MASK masking method against DES power consumption attack, which can effectively solve the problem of Hamming distance leakage between two rounds of operations in the DES cycle iteration MASK masking method in the prior art, and ensure that the two Sensitive information such as Hamming distance is no longer leaked between round operations, which can effectively prevent power analysis attacks

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