Encryption method and equipment and decryption method and equipment

Abstract

The embodiment of the invention relates to the field of quantum communication, in particular to an encryption method and equipment and a decryption method and equipment, and aims to solve the problemof incapability of realizing encryption processing of highly confidential service data since the unconditional security of the encrypted service data cannot be ensured in an existing service data encryption process. The encryption method comprises the following steps: acquiring a quantum key and service data to be encrypted with equipment used for encrypting; encrypting the service data to be encrypted with the quantum key to generate a ciphertext; inserting the ciphertext into a set byte in an OTN (Optical Transport Network) overhead byte, and performing packaging to obtain an OTN frame including the ciphertext; converting the OTN frame from an electric signal to a light signal, and transmitting the light signal to second OTN equipment. Through adoption of the encryption method, the service data are encrypted by the quantum key, so that the unconditional security of the service data transmission is ensured. Meanwhile, the ciphertext is inserted into the set byte of the OTN overhead byte, so that the encryption processing of a highly confidential service can be realized.

Description

technical field [0001] The invention relates to the field of quantum communication, in particular to a method and device for encryption and decryption. Background technique [0002] With the rapid development of network technology, a large amount of sensitive information needs to be transmitted through the network, and people need to protect sensitive information from being lost or attacked. Encryption is one of the important means to ensure information security. The existing classical encryption system is based on computational complexity, which may be deciphered. In the classical cryptosystem, only one-time pad has unconditional security, and how to generate a large number of random number keys has always been a difficult problem. The emergence of Quantum Key Distribution (QKD) technology has solved this problem. [0003] QKD specifically uses the quantum state as the information unit, and uses some principles of quantum mechanics to transmit and protect information. Usua...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides an encryption and decryption method and device to solve the problem that the existing business data encryption process cannot guarantee the unconditional security of the encrypted business data and cannot realize the encryption processing of highly confidential business data

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