Authenticable asymmetrical group secret key negotiation method in mobile unbalanced network

Abstract

The invention relates to an authenticable asymmetrical group secret key negotiation scheme in a mobile unbalanced network. The scheme comprises the steps that signature and authentication of group members are carried out, group members negotiate an asymmetrical shared secret key, and consistency verification of the shared secret key is carried out. According to the signature and authentication, a short signature mechanism of mobile equipment in a network is achieved by adopting a bilinear mapping technology, and members of mobile groups provide identify authentication by using the signature before the group secret key is negotiated to defense active attack of adversaries. According to step that the group members negotiate the asymmetrical shared secret key, all mobile equipment in the mobile unbalanced network negotiates a pair of asymmetrical group communication encryption/decryption secret keys, and members outside the group can send secret messages to members inside the group by encrypting the secret messages through a public key without the necessary of joining the group. According to the consistency verification of the shared secret key, after the group members negotiate the group secret key, the accuracy and the consistency of the calculated group secret key can be guaranteed. According to the authenticable asymmetrical group secret key negotiation scheme in the mobile unbalanced network, when secret communication is carried out among mobile group equipment in the mobile network environment, safe communication among the group equipment can be guaranteed, energy consumption of calculation and communication is quite low, and good flexibility, safety and practicability are achieved.

Description

technical field [0001] The invention relates to a security group secret key negotiation scheme in a mobile network environment, in particular to an authenticated asymmetric group secret key negotiation scheme in a mobile unbalanced network environment, and belongs to the field of network communication security. Background technique [0002] Many complex cryptographic system designs rely on the existing secret channel between multiple communication parties. The main purpose of the group key agreement (group key agreement, GKA) protocol design is to provide two or more group members with a secure Secret channels are widely used in the fields of collaborative computing and distributed computing, such as multi-party secure computing, file sharing and distribution, video conferencing and group chat systems. Simply put, the GKA protocol is for group members to communicate in an open network environment. Exchange information and negotiate to calculate a common key, which is used as...

AI Technical Summary

Problems solved by technology

[0006] In view of the fact that the group secret key negotiation currently studied has a large amount of calculation and communication, it is not suitable for energy-constrained mobile

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