Data decryption method based on quantum shared key

Abstract

A data encryption method based on a quantum shared key. The data sender generates a symmetric content encryption key Rs through a quantum random number generator; the content encryption key Rs of the sender is encrypted with the key Rc shared with the receiver to form an The key-encapsulated ciphertext C; the sender uses the content encryption key Rs to encrypt the data content to form the content ciphertext X; the sender packs the key-encapsulated ciphertext C and the content ciphertext X and sends it to the receiver, and the receiver uses the key The Rc decryption key encapsulates the ciphertext C to obtain the content encryption key Rs, and then uses Rs to decrypt the content ciphertext X to restore the data content. Compared with the prior art, the sending end of the present invention encrypts data content with a local content encryption key, encrypts the content encryption key with a key shared with the receiving end, and encrypts data with a content encryption key. Compared with using a shared key The method for directly encrypting the data content and then transmitting it does not need to encrypt the data content multiple times for the point-to-point communication, thereby improving the encryption efficiency.

Description

technical field [0001] The invention relates to the technical field of secure communication, in particular to a data encryption method based on a quantum shared key. Background technique [0002] The digital envelope is a technology that comprehensively utilizes the advantages of both symmetric encryption technology and asymmetric encryption technology to carry out information security transmission. The digital envelope not only takes advantage of the fast speed and good security of the symmetric encryption algorithm, but also takes advantage of the convenient key management of the asymmetric encryption algorithm. In the digital envelope, the information sender uses a symmetric key to encrypt the content of the information, and then encrypts the symmetric key with the receiver's public key (this part is called a digital envelope), and sends it together with the encrypted information To the recipient, the recipient first uses the corresponding private key to open the digital...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a data encryption method based on a quantum shared key to solve the problem that in the prior art, in the process of implementing digital envelope encryption communication on a quantum shared key network, firstly, two shared keys are negotiated to obtain a plurality of nodes to share The session key, and then the method of encrypting the data content through the session key and then transmitting it makes the data encryption process cumbersome and greatly reduces the efficiency of encryption and decryption.

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