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1. (WO2018086333) ENCRYPTION AND DECRYPTION METHOD AND DEVICE

Pub. No.:    WO/2018/086333    International Application No.:    PCT/CN2017/085783
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Thu May 25 01:59:59 CEST 2017
IPC: H04L 9/08
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: SU, Changzheng
苏长征
LU, Jiansong
卢建松
XIAO, Xinhua
肖新华
Title: ENCRYPTION AND DECRYPTION METHOD AND DEVICE
Abstract:
An encryption and decryption method and device, for use in resolving the problem of being unable to ensure unconditional security of encrypted service data during an existing service data encryption process, thereby being unable to encrypt highly confidential service data. The device for encryption in the present invention comprises: obtaining a quantum key and service data to be encrypted; using the quantum key to encrypt the service data to be encrypted to generate ciphertext; inserting the ciphertext into a set byte in an OTN overhead byte, and encapsulating to form an OTN frame including the ciphertext; and converting the OTN frame from an electrical signal into an optical signal and then transmitting the optical signal to a second OTN device. By encrypting service data using a quantum key, unconditional security of service data transmission can be ensured, and by inserting ciphertext into a set byte in an OTN overhead byte, a highly confidential service can be encrypted.