Data encryption and decryption and key distribution method and device, equipment and readable storage medium

Abstract

The embodiment of the invention provides a data encryption method, the method is applied to a first terminal, and the method comprises the steps: determining a to-be-encrypted file selected by a userof the first terminal and a selected target user under the condition that a first intelligent password key is detected to be inserted into the first terminal; calculating the file content of the to-be-encrypted file according to an SM3 algorithm to obtain an abstract of the file content of the to-be-encrypted file; signing the abstract according to a signature private key of a user of the first terminal stored in the first intelligent password key to obtain a signature abstract; taking a true random number generated by the first intelligent password key as a session key, and encrypting the session key according to the target encryption public key and an SM2 algorithm to obtain a session key ciphertext; encrypting the file content of the to-be-encrypted file according to the session key andan SM4 algorithm to obtain ciphertext content; therefore, the security of the encrypted data is improved.

Description

Technical field [0001] The embodiments of the present application relate to the field of computer technology, and in particular to a method, device, electronic device, and readable storage medium for data encryption, key issuance, and data decryption. Background technique [0002] With the rapid development of information science and Internet technology, data security issues have intensified, and network and information security have received unprecedented attention. As a terminal protection method for data security, the data leakage prevention system has received extensive attention and use. The point-to-point encryption and decryption of data is one of the important components of the system, and it also plays a key role in the use and development of the entire system. . [0003] In related technologies, the technical solution adopted in the data leakage prevention system to realize the point-to-point encryption of data is: through the use of encryption public and private keys an...

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Problems solved by technology

[0003] In related technologies, the technical solution adopted in the data leakage prevention system to realize the point-to-point encryption of data is: by using the encryption public-private key and signature public-private key embedded in the program, pseudo-random numbers and algorithms such as RSA, DES, and SHA1, the Data is encrypted point-to-point; however, in related technologies, due to the poor security of pseudo-random numbers, and the encryption public-private key and signature public-private key embedded in the program are easy to be cracked by criminals, resulting in low security of encrypted data generated by this method , there is a risk of data leakage

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