Group message encryption method and device

A technology of group message and encryption method, applied in the field of communication, can solve the problems of low security of group message, easy to be known by service system, group message encryption occupying network resources and large client and server resources, etc. Computational resources and network bandwidth resources, the effect of improving security

Active Publication Date: 2018-01-26
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a group message encryption method and device, which are used to at least partially solve the technical

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  • Group message encryption method and device
  • Group message encryption method and device

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Embodiment Construction

[0032] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Aiming at the security problem of existing group messages, the present invention proposes a group message encryption scheme, and completes the generation and distribution of encryption keys in the stage of creating a group at a client. In the group message sending stage, the client uses the encryption key to encrypt and decrypt the group message to realize point-to-point encryption of the message. After the group message is encrypted and distributed using the encryption key, the serv...

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Abstract

`The invention provides a group message encryption method and a device. An encryption key Ks is randomly generated and is distributed to group members when a group is established; a group message Msgis encrypted through utilization of the Ks, thereby generating a group encrypted message EMsg; the EMsg is signed through utilization of a private key of a sending client, thereby generating a first signature SignMes; a server verifies the SignMes through utilization of a corresponding pubic key; and the EMsg is forwarded to other clients in the group if the SignMes is verified successfully. The server does not know plaintext content of the group message, so the group message sending security is improved. The encryption key Ks employed each time when the group message is sent is relatively fixed, the encryption key is not generated each time when the group message is sent, the encrypted encryption key is not sent among the clients in the group, and the clients receiving the group message do not need to decrypt to obtain the encryption key, so computing resources and network bandwidth resources of the clients can be reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a group message encryption method and device. Background technique [0002] With the rapid development of the mobile Internet, instant messaging software has swept the market. The existing instant messaging software business has the following problems in the security handling of group messages: [0003] 1. Usually, group messages are not processed securely, making user information vulnerable to monitoring and theft by malicious attackers. [0004] 2. Simple message encryption for group message transmission, that is, channel encryption, cannot achieve point-to-point encryption. It is easy for business operation and management personnel to spy on the user's message content, and there is still a risk of user privacy being leaked. A simple message encryption method, for example, each client in the group establishes a TLS (Transport Layer Security) / SSL (Secure Sockets...

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Application Information

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IPC IPC(8): H04W12/02H04L9/08H04L12/58H04L29/08
Inventor 郑明杨瑞王志军王蓉
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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