File encryption method, file decryption method, file encryption device, file decryption device and equipment

The invention provides a file encryption and decryption method, device and equipment, relates to the technical field of cloud computing, in particular to the technical field of data transmission, encryption and decryption and security authentication, and can be applied to scenes such as software upgrading of automatic driving. A specific embodiment of the file encryption method comprises the steps of obtaining a target file; encrypting the target file by using a key of a symmetric cryptographic algorithm to generate an encrypted file; encrypting a secret key of the symmetric cryptographic algorithm by using a public key of the client to obtain an encrypted secret key; performing hash operation on the encrypted file and the encryption key to obtain a first encrypted hash value; and sending the encrypted file, the encryption key and the first encrypted hash value to the client. According to the embodiment, the symmetric cryptographic algorithm, the asymmetric cryptographic algorithm and the Hash algorithm are a