Method for secret key configuration based on specified group

Abstract

The invention provides a key configuration method to a designated group. The method mainly comprises that the designated group is configured with a shared public key to obtain the private key of each member in the designated group, and sends the private keys to the corresponding group member. The adoption of the method of the invention is able to efficiently decrease the workload of both a sender and a receiver, and also carry out the key packages to all the group members.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for configuring keys for a specified group. Background technique [0002] Group communication (also called multi-party communication) refers to a communication scenario involving two or more members. Group communication generally has multiple data receivers and one or more data senders. In communication, unicast technology or multicast technology may be used to send messages. [0003] Group communication is an important communication method in a distributed network. How to safely and reliably send information to a designated group and enable all members in the group to receive information independently is a key issue in group communication. [0004] For example, a service provider wants to deliver multimedia streams to its users through the network. In this application scenario, all users of the service provider form a group, and a one-to-one relationship is formed between the...

AI Technical Summary

Problems solved by technology

[0025] The disadvantage of the method in the above prior art is: at the sending end, the sender needs to generate a ciphertext for each group member, so the calculation amount of the sender increases linearly with the increase of the number of group members

In addition, the security of this scheme is based on the random oracle model, so its security requires additional conditions

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