SM3-based data encryption method, system, device and medium
A technology for data encryption and data to be encrypted, which is applied in digital transmission systems, encryption devices with shift registers/memory, transmission systems, etc., and can solve the problem that the security of encrypted data needs to be improved, and the length of the hash value cannot be adaptively adjusted, etc. problem, to achieve the effect of improving safety
Pending Publication Date: 2022-01-11
HUNAN YAOSHENG COMM TECH CO LTD
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However, because the length of the hash value of the SM3 algorithm cannot be adaptively adj
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[0033] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.
[0034] SM3 is a cryptographic hash function standard adopted in my country, which was released by the State Cryptography Administration on December 17, 2010. The relevant standard is "GM / T 0004-2012 "SM3 Cryptographic Hash Algorithm". In the commercial cryptographic system, SM3 is mainly used for digital signature and verification, message authentication code generation and verification, random number generation, etc., and its algorithm is public. According to the State Encryption Admi...
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The invention discloses a data encryption method, system and device based on SM3 and a medium. The method comprises the following steps: encrypting to-be-encrypted data based on an SM3 algorithm, and for each iteration sequence in the iteration process of the SM3 encrypted data, encoding each iteration sequence into a corresponding hash value with the length of L by using a weighted probability model-based one-way hash function, and performing an iteration process according to the coded iteration sequence until the encryption process of the data is completed, wherein the coding process comprises the steps of self-defining the bit length of a hash value corresponding to each iterative sequence; solving a weight coefficient r value of the weighted probability model by utilizing the bit length of the hash value, and finally coding each iterative sequence by utilizing a weighted coding formula and the solved weight coefficient r value. According to the method and the device, the hash value length can be self-defined for each iteration sequence, and the bit length of the hash values of the iteration sequences iterated in sequence can be adaptively adjusted according to the attack intensity, so the security of data encryption is improved.
Description
technical field [0001] The invention relates to the technical field of data encryption, in particular to an SM3-based data encryption method, system, equipment and medium. Background technique [0002] SM3 is a cryptographic hash function standard adopted in my country, which was released by the State Cryptography Administration on December 17, 2010. The relevant standard is "GM / T 0004-2012 "SM3 Cryptographic Hash Algorithm". In the commercial cryptographic system, SM3 is mainly used for digital signature and verification, message authentication code generation and verification, random number generation, etc., and its algorithm is public. According to the State Encryption Administration, its security and efficiency are comparable to SHA-256. However, because the length of the hash value of the SM3 algorithm cannot be adaptively adjusted according to the attack strength, the security of encrypted data needs to be improved. Contents of the invention [0003] The present i...
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Login to View More IPC IPC(8): H04L9/06
CPCH04L9/0643
Inventor 高金定周浪
Owner HUNAN YAOSHENG COMM TECH CO LTD