White-box software realization method based on remainder system for commercial cipher SM2 encryption algorithm
A technology of remainder system and encryption algorithm, which is applied in the field of white box software implementation of commercial secret SM2 encryption algorithm, can solve problems such as key information occurrence, achieve high practicability, expand the scope of use, and reduce the cost of use
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[0079]The design idea of the present invention is to propose a white box software implementation scheme of the SM2 encryption algorithm based on technologies such as lookup table and scrambling for the private key security problem of the SM2 encryption algorithm running in an untrustworthy environment. The solution is implemented in the way of cloud plus terminal, which can effectively protect the security of the terminal private key during storage and operation, and can be directly used in combination with the standard SM2 encryption algorithm. In addition, this patent uses the remainder system theory to decompose large integer operations, thereby reducing the size of the lookup table and reducing the storage space required by the algorithm.
[0080] This application is constructed based on the national commercial encryption standard SM2 encryption algorithm. The technical solution requires three types of auxiliary functions: password hash function, key derivation function a...
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