Group cipher key generating method, system and apparatus

Abstract

In order to solve the problems such as large amount of calculation, more storage space occupation and higher requirements to band width in a group key negotiation method in the prior technology. The invention provides a method of generating a group of secret keys as well as a system and equipment carrying out the method, which belongs to the network communication field. The method comprises the steps that: group members forms a logic ring, system parameters are selected and each member and a neighboring member generate a secret key and an intermediate value shared by the two members and issue the intermediate value; secret keys of other members shared by two members are calculated according to all intermediate values received to generate a group of keys. The system comprises a logic ring forming module, a system parameter selecting module, a message receiving and transmitting module and a group key generating module. The equipment comprises a logic ring forming module, a system parameter selecting module, a D-H public key value calculating module, a shared key generating module, an intermediate value generating module, a message receiving and transmitting module and a group key generating module. The technology provided by the invention solves the problems in the prior technology and is easy to use.

Description

A method, system and device for generating a group key technical field The invention relates to the field of network communication, in particular to a method, system and equipment for generating a group key. Background technique The key to solve group communication security by using multi-party shared group key is the generation and distribution of the group key, which must be exclusive, that is, non-group members cannot obtain the group key. The existing group key management technologies can be divided into two categories: centralized management and distributed negotiation. Compared with the centralized management type, the distributed negotiation group key management technology is suitable for use in occasions where a central control node cannot or cannot be established, such as military Adhoc networks, P2P networks, and confidential video conferences. The existing group key agreement schemes are all based on the discrete logarithm problem over finite fields. The Burmes...

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Problems solved by technology

In order to solve the problem that the group key negotiation method in the prior art has a large amount of calculation, takes up a large storage space, and requires high bandwidth, the embodiment of the present invention provides a method, system and device for generating a group key

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