Communication method, device and system based on combined public key cryptography system

Abstract

The invention provides a communication method, device and system based on a combined public key cryptography system. The method includes the steps of obtaining a private key of a first node from a secret key generating center through the first node, obtaining identification of a second node according to an adjacent node identification list, calculating a public key of the second node according to the identification of the second node, calculating a shared secret key parameter of the first node according to the secret key of the first node and the public key of the second node, then, calculating a shared secret key of the first node according to the shared secret key parameter of the first node, generating a first secret key verification code corresponding to the shared secret key of the first node, sending shared secret key verification information with the first secret key verification code to the second node, and receiving shared secret key response information from the second node. The calculation steps can be completed offline, the number of times of interaction between the nodes is lowered, and therefore when the first node starts verification, verification can be completed in a quite short period of time, and verification efficiency is improved.

Description

technical field [0001] The present invention relates to communication technology, in particular to a communication method, device and system based on combined public key cryptosystem. Background technique [0002] In the communication technology, in order to realize the confidentiality and integrity of the communication between two communication entities, the prior art proposes a transport layer security (Transport Layer Security, TLS for short) protocol. Specifically, the TLS protocol stack is divided into two layers, the bottom layer is the TLS record protocol, and the upper layer includes the TLS handshake protocol, the TLS password change protocol, and the TLS warning protocol. The TLS record protocol is built on top of TCP, and the connection security it provides has two characteristics: first, confidentiality, using a symmetric encryption algorithm; second, integrity, using a hash-based message authentication code (Hash-based Message Authentication Code) , referred to...

AI Technical Summary

Problems solved by technology

[0004] However, using the TLS handshake protocol provided by the existing technology for interaction, due to the large number of interactions between the client and the server during the handshake process, and the need to verify the certificate online and calculate the shared key, thereby reducing the authentication efficiency

Images