Key backup and recovery method based on integrated encryption technology

Abstract

The invention belongs to the technical field of information security, and particularly relates to a key backup and recovery method based on an integrated encryption technology. The method comprises the following steps: configuring a security level, and configuring different encryption algorithms and the number of information required to be input by a user according to the corresponding security level; obtaining an encryption key according to the biological characteristic information and the private information of the user, and encrypting the key to be backed up and stored by the user through an encryption algorithm; storing the information generated by the integrated encryption; decrypting and recovering the key stored in an encrypted mode when the key needs to be used for decryption or signature; obtaining all initial key plaintexts and re-encrypting when the password needs to be modified; and re-storing the encrypted key to cover the old data and finish the password modification operation. Safety and usability are weighed by the method, a user sets passwords of different safety levels according to needs, and the problem that an existing key storage method is incomplete is solvedthrough an integrated encryption algorithm.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a key backup and recovery method. Background technique [0002] Modern cryptography is mainly divided into symmetric cryptography and asymmetric cryptography (also known as public key cryptography). The correctness and security of cryptographic algorithms depend on mathematical problems: large integer decomposition problems, discrete logarithm problems, elliptic curve discrete logarithms Problems, these problems are based on large integers for calculation. In the environment of rapid development of computer hardware, academic research and production environments, the length of a secure cryptographic key must be at least 128 bits, and 256 bits is more commonly used. The more bits, the higher the security strength. Enterprises and general users have to memorize a 256-bit key when they produce and use secure password products on a daily basis. For example, ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a key backup and recovery method based on integrated encryption technology, which balances security and ease of use. Users can set passwords with different security levels according to their own needs to solve the problem of existing key encryption. The problem of imperfect storage method

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