A digital signature method, device, mobile device and storage medium

Abstract

The invention discloses a digital signature method to solve the problem that in the prior art, an attacker monitors the power consumption curve and uses a statistical method to analyze and process according to the characteristic change rule of the curve, thereby stealing the private key and causing the security of the algorithm to be attacked The problem. The method includes: determining a first parameter for digital signature and a second parameter for randomization processing; performing randomization processing on the private key and the first parameter in turn according to the second parameter, and obtaining randomized private keys respectively and the randomized first parameter; the digital signature result is calculated according to the randomized private key and the randomized first parameter.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a digital signature method. Background technique [0002] In the process of traditional digital signatures, multiple iterative and cyclic operations of block ciphers lead to certain characteristic changes in hardware execution time, power consumption, electromagnetic radiation and other parameters in electronic equipment. Therefore, if an attacker monitors the electronic The execution time curve, power consumption curve, and electromagnetic radiation curve of the device hardware may use statistical methods to analyze and process the power consumption curve according to the characteristics of the above curves, thereby stealing the private key and causing the security of the algorithm to be attacked. Contents of the invention [0003] An embodiment of the present invention provides a digital signature method, which uses random numbers to mask key information used for...

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Problems solved by technology

[0003] An embodiment of the present invention provides a digital signature method, which uses random numbers to mask key information used for digital signatures, so as to solve the problem in the prior art by monitoring power consumption curves and using Statistical methods analyze and process the power consumption curve, thereby stealing the private key, leading to the problem that the security of the algorithm is attacked

[0004] The embodiment of the present invention also provides a digital signature device, a mobile device, and a storage medium, which are used to solve the problem that in the prior art, an attacker monitors the power consumption curve and uses statistical methods to analyze and process the power consumption curve according to the characteristics of the curve, thereby stealing private information. key, leading to the problem that the security of the algorithm is attacked

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