Large cluster safe real-time communication method executed by using elliptical curve

Abstract

This invention discloses a method of using elliptical curve to perform large trunking safety real-time communication, belonging to the field of network real-time communication and including following steps: initializing a communication group, a register protocol, a group key management protocol, a re-registration protocol and a source authentication protocol. The communication group referred in this method is composed of a set of controllers / main servers, a receiver and a sender. The method is a new type which is designed based on the elliptical curve theory and used for the group key management and the source authentication protocol for the real-time communication, and supports the re-distribution of the key and the rescinding level process. In the level and the rescinding process, a group management server sends the key materials based on the elliptical curve to the sender and the receiver. In the next group key building process, the sender and the receiver can uses these key materials to build a shared group key without consulting with the group management server. This invention capable of saving the storage space is safer and with higher efficiency.

Description

technical field [0001] The invention relates to a safe real-time communication method, in particular to a large cluster safe real-time communication method using elliptic curves, and belongs to the field of network real-time communication. Background technique [0002] The need for real-time, dynamic large cluster secure communication is becoming more and more significant. There are two key security requirements that must be considered here: confidentiality and origin authentication requirements. Confidentiality means that group information can only be read by specific recipients, which requires the establishment of a shared group key between the sender and the recipient to encrypt and decrypt the transmitted content. The group key management process usually includes key generation, key distribution and key redistribution. Many schemes have been devised in the group key management process. [0003] The simplest solution is a "Simple Key Distribution Center (SKDC)". In th...

AI Technical Summary

Problems solved by technology

There are three main problems with public-key-based signatures compared to symmetric-key-based signatures: high signing / verification fees mean that public-key-based signatures require more CPU cycles than symmetric-key signatures; high storage The cost means that each recipient needs to store the information of all senders; when a new sender in the receiving group broadcasts signed information to the recipients, all the recipients will request the certificate authority ( CA) to verify the sender of the certificate, which will cause the CA to fail

Additionally, an attacker may sign messages with an unauthorized certificate, thus creating a denial of service attack

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