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Encryption method and system of mobile instant message

An encryption method and message technology, applied in message/mailbox/announcement, electrical components, wireless communication, etc., can solve the problem of low confidentiality of instant messages, and achieve the effect of saving wireless bandwidth resources, reducing burden, and enhancing confidentiality.

Active Publication Date: 2013-10-02
成都三零瑞通移动通信有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problem that the encryption method of instant message in the prior art has low confidentiality, the present invention discloses an encryption method of mobile instant message

Method used

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  • Encryption method and system of mobile instant message
  • Encryption method and system of mobile instant message

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Embodiment Construction

[0027]The mobile terminal and the password server obtain their own certificates through the public key infrastructure (PKI). After the mobile terminal successfully registers with the instant messaging server, the mobile terminal and the password server exchange certificates (to ensure the validity of both certificates). The mobile terminal obtains the public key of the cryptographic server through the certificate of the cryptographic server, and the cryptographic server obtains the public key of the mobile terminal through the certificate of the mobile terminal, and one-to-one correspondence with the ID number (unique identification number) of the mobile terminal. The main purpose of the above steps is the process that the mobile terminal and the password server obtain the other party's public key through the instant message server, which can be obtained through registration, and of course any other method can also be used. This does not belong to the key content of the present...

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Abstract

The invention belongs to the technical field of instant messages and discloses an encryption method of a mobile instant message. The encryption method comprises the steps that the instant message is encrypted by a random number R; the random number R is encrypted by a public key of a password server simultaneously; the password server decrypts the random number R with a private key of the password server and encrypts the random number R with a public key of a mobile terminal of a receiver; the instant message and the random number are sent to the mobile terminal of the receiver; the mobile terminal of the receiver decrypts the random number R with a private key of the mobile terminal, and then decrypts the instant message with R; and the instant message is received and displayed. The instant message is encrypted by the random number R, and the private key R is encrypted during transmission. Confidentiality of the instant message is strengthened. Meanwhile, all password processing such as matching of a user identity with a password, and password conversion are performed on a server with higher processing capacity, so that the terminal burden is reduced, and the purposes of ensuring message transmission security and reducing the computation of the terminal are achieved. In addition, an additional communication flow is not required to be added between the terminal and the server when the encrypted message is transmitted, so that the limited wireless broadband resource is saved.

Description

technical field [0001] The invention relates to a mobile instant message (instant messaging) system, in particular to an encryption method and system for a mobile instant message. Background technique [0002] Instant message (Instant Message, IM) has become a very popular way of instant communication between mobile terminals. Instant message is a communication technology that relies on the Internet to achieve near real-time message delivery between multiple terminals. It supports Media types include sound, text, and images, etc. It is a low-cost, high-efficiency, and comprehensive "communication platform." [0003] Mobile Instant Messaging (M-IM) is a combination of mobile communication and Internet technology, using the mobile network packet domain (PS domain) to realize the instant communication function of text, voice, picture, mail and files between mobile phone users. The convenience of mobile instant messaging is very good, but it also faces very large security risks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/12H04W12/02
Inventor 曾勇
Owner 成都三零瑞通移动通信有限公司
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