Encryption method, encryption apparatus, decryption method, decryption apparatus and terminal

Abstract

The invention discloses an encryption method, an encryption apparatus, a decryption method, a decryption apparatus and a terminal. The encryption method comprises: using a first secret key cipher text as a secret key of a first symmetric encryption algorithm so as to encrypt a clear text by the first symmetric encryption algorithm to obtain a cipher text; acquiring an informative abstract of the clear text, using the informative abstract as an original text of a signature algorithm, and using a second secret key cipher text as a secret key of the signature algorithm so as to generate a digital signature by the signature algorithm; packaging the first secret key cipher text, the second secret key cipher text and the digital signature to form an original text of an asymmetric cryptographic algorithm, and using an acquired public key as a secret key of the asymmetric cryptographic algorithm so as to generate a secret key set by the asymmetric cryptographic algorithm; and sending the cipher text and the secret key set to the terminal. According to the technical scheme of the invention, the encryption method, the encryption apparatus, the decryption method, the decryption apparatus and the terminal can be simultaneously guaranteed to have the characteristics of high encryption efficiency, small system resource occupation and encrypted data safety when data is encrypted.

Description

technical field [0001] The present invention relates to the technical field of terminals, in particular, to an encryption method, an encryption device, a decryption method, a decryption device and a terminal. Background technique [0002] The current file transfer generally adopts transparent transmission method, symmetric encryption method, asymmetric encryption method and general hybrid encryption method. Symmetric encryption technology has the advantages of high encryption efficiency and less system resource occupation, but because this technology needs to transmit keys synchronously, it is difficult to guarantee key security. Although asymmetric encryption technology solves the problem that symmetric encryption technology needs to transmit keys synchronously, the encryption operation of this technology is complicated, and the performance and efficiency of encrypting large data are greatly reduced. [0003] Therefore, how to simultaneously ensure high encryption efficien...

AI Technical Summary

Problems solved by technology

Symmetric encryption technology has the advantages of high encryption efficiency and less system resource occupation, but because this technology needs to transmit keys synchronously, it is difficult to guarantee key security

Although asymmetric encryption technology solves the problem that symmetric encryption technology needs to transmit keys synchronously, the encryption operation of this technology is complicated, and the performance and efficiency of encrypting large data are greatly reduced.

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