A method for authentication and key agreement between devices

Abstract

The invention discloses a certification and key agreement method between devices. The certification and key agreement method between the devices comprises that the same key information records are pre-established in a primary device and a slave device; when the primary device determines whether the slave device possesses the same key serial number, the slave device generates a random number RA; the primary device and the slave device calculate result data A1, B1 and C1 according to the key information records and the random number RA of the primary device and the slave device; when the primary device determines that the calculated result data A1 and B1 is equal to the calculated data A1 and B1 of the slave device, the slave device generates a random number RB; the primary device and the slave device calculate result data A2, B2 and C2 according to the key information records, the result data C1 and the random number RB of the primary device and the slave device; when the primary device determines that the calculated result data A2 and B2 is respectively equal to the result data A2 and B2 calculated by the slave device, the key between the primary device and the slave device is C2. The certification and key agreement method between the devices is safe and reliable and is beneficial to guaranteeing safety and reliability of data interaction between devices.

Description

technical field [0001] The invention relates to digital communication technology, in particular to a method for authentication and key negotiation between devices in a digital communication system. Background technique [0002] With the emergence and development of global informatization and communication network technology, human society has undergone tremendous changes. People can communicate more conveniently, and the exchange of information is becoming more and more frequent. [0003] Before the two devices in the digital communication system need to exchange data, in order to ensure the security of the exchanged data, the two devices need to recognize each other’s identity. Encrypt transmission with session key. [0004] At present, authentication key agreement methods include: based on public key encryption, based on digital signature, based on symmetric key, based on password and so on. However, a single authentication and encryption method is mostly used among exi...

AI Technical Summary

Problems solved by technology

However, existing devices mostly use a single authentication and encryption method, which is simple but less secure

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