Method, device, terminal device and system for generating shared key

Abstract

Embodiments of the present application provide apparatus and methods for generating a shared key, including setting up a key negotiation connection, and determining an algorithm code by negotiating using the key negotiation connection. An algorithm corresponding to the algorithm code is retrieved from a pre-stored algorithm library, and a pre-stored seed key is calculated using the algorithm to obtain a shared key. Compared with traditional key generation methods, embodiments of the present invention avoid the problem of a high bit error rate that occurs in the traditional quantum key generation methods, especially quantum key generation methods. One exemplary method determines an algorithm code through negotiation, retrieves a pre-stored algorithm corresponding to the algorithm code, and generates a new shared key using a seed key.

Description

technical field [0001] This application relates to the field of electronic technology, specifically a method, device and terminal device for generating a shared key at the sending end, a method, device and terminal device for generating a shared key at the receiving end, and a The system used to generate the shared secret. Background technique [0002] In cryptography, private key cryptography and public key cryptography are used to ensure the security, integrity, non-repudiation and resistance to identity masquerading attacks of identity information in communication. In the public key infrastructure, the digital signature technology based on the public key cryptography mechanism is mainly used to realize identity authentication. Typical digital signature algorithms include RSA algorithm, ECC algorithm, DSA algorithm, EIGamal algorithm, etc. These algorithms are based on computational complexity. The security of the classical authentication system, which has the risk of bei...

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Problems solved by technology

However, the currently proposed quantum key distribution protocol negotiates the shared key based on the bit error rate. In large-scale business scenarios, there is a problem of insufficient key distribution. At the same time, the shared key for quantum key agreement is affected by external interference factors. It is relatively large, and it is necessary to rely on the bit error rate to determine the output of the quantum key. Therefore, because there is no effective bit error rate estimation method, it will affect the output of the quantum actual key quantity. At present, the domestic bit error rate is greater than 7%. Above, the quantum key cannot be generated, and the bit error rate tolerance rate in Japan is the highest abroad, but the key cannot be generated if it exceeds 11%.

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