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

Abstract

The present invention provides a method for a transmitting end to generate a shared key. The method includes the following steps that: a key negotiation connection is built between the transmitting end and a receiving end; the transmitting end and the receiving end negotiate with each other through the key negotiation connection so as to determine an algorithm code; an algorithm corresponding to the algorithm code is queried in a pre-stored algorithm library; and a pre-stored seed key is calculated according to the algorithm, so that a shared key can be obtained. Compared with a traditional key generation method, especially a quantum key generation method, the method of the invention determines the algorithm code through negotiation, and then inquires the pre-stored algorithm corresponding to the algorithm code, and calculates and generates the new shared key by using the generated seed key, and therefore, the problem of the high bit error rate of the traditional quantum key generation method can be avoided, a key generation success rate is high, and the requirements of large-scale business can be satisfied.

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...

AI Technical Summary

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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