Key exchange method and device, storage medium and computing device

Abstract

The invention provides a key exchange method and a device, a storage medium and a computing device, and relates to the technical field of information security. The method comprises the following steps: receiving an RB sent by opposite-end equipment; if it is determined that the RB meets the elliptic curve equation, calculating QA based on rA, RB, dA and PB; if it is determined that the QA meets the elliptic curve equation, generating a shared key KA according to a KDF key derivation function and specified parameters, and other parameters, except for the coordinate (xA, yA) corresponding to theQA, in the specified parameters are the same as those of the opposite-end equipment for calculating the shared key. Therefore, the execution steps of the two key exchange parties are the same, the algorithm is simple, and the two key exchange parties are convenient and efficient. And the information is transmitted only once, so that the processing resource consumption caused by multiple times ofinformation interaction is reduced, and the key negotiation efficiency can be improved. Moreover, in the transmission process, even if the RB is intercepted, the shared key cannot be obtained, so thatthe security of the shared key is ensured.

Description

technical field [0001] The present application relates to the technical field of information security, and in particular to a key exchange method, device, storage medium, and computing device. Background technique [0002] The birth of public key cryptography has become a revolutionary event in cryptography, which solves the key exchange protocol problem that traditional symmetric cryptography is difficult to solve. At present, public key cryptography mainly includes RSA, ECC / SM2, IBC / SM9, etc. Correspondingly, many key exchange algorithms have appeared, for example, the DH (Diffie-Hellman) key exchange algorithm based on RSA, the national key exchange algorithm based on ECC, etc. The encrypted version of the SM2 key exchange algorithm, etc. [0003] In the key exchange algorithm of RSA and ECC, the key exchange parties usually perform the same operation, but the steps performed by both parties in the SM2 key exchange standard algorithm are asymmetrical, and the algorithm d...

AI Technical Summary

Problems solved by technology

[0003] In the key exchange algorithm of RSA and ECC, the key exchange parties usually perform the same operation, but the steps performed by both parties in the SM2 key exchange standard algorithm are asymmetrical, and the algorithm design is complicated, which is inconvenient for both parties to the key exchange , and affect the realization efficiency

Moreover, the interaction between the two parties is cumbersome, and the number of information transfers is large, which is not conducive to protecting the shared key

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