CDMA system and method for implementing dynamic distribution of cipher key

Abstract

The invention provides a code division multiple access system that realizes the cryptographic key dispensing, comprising mobile station, base station and switchboard. The invention is characterized by that, the system also includes, the cryptographic key authentication unit exchanging the mutual cryptographic key information with the mobile station through the internal interface for judging the effectiveness of the cryptographic key, a transfer unit proceeding the short data bursting message interaction with the switchboard, the cryptographic key management and dispensing unit exchanging the related information of the cryptographic key request needed by the key dispensing with the transfer unit through the internal interface. The message used by the invention can realize the confirmation resending function and guarantee the dependability of the transmission of the cryptographic key information on air.

Description

technical field [0001] The invention relates to the technical field of mobile communication encryption, in particular to a code division multiple access system and method for realizing key dynamic distribution. Background technique [0002] In the existing code division multiple access cellular mobile communication system, spread spectrum communication technology and air interface encryption are used to improve the concealment and confidentiality of the cellular mobile communication system to a certain extent, but this common security technology cannot Satisfy the security needs of some mobile communications with high confidentiality requirements. In order to ensure the information security of high-secret mobile communication, it is necessary to support end-to-end secure communication in the system, that is, to interconnect with the security sub-system, and to provide special encryption for encrypted voice / data information in the code division multiple access cellular mobile...

AI Technical Summary

Problems solved by technology

[0003] In the field of mobile communication, there are some methods for key distribution. For example, Chinese patent application No. 97191858 proposes a method for key management in mobile communication networks. This invention mainly proposes a method for implementing key The static management method cannot adapt to the dynamic key distribution function, and it cannot realize the strictly confidential communication requirements of one-time pad in the mobile communication system

The Chinese patent No. 99110495 also proposes another method of key distribution in mobile communication services, but this method is aimed at transmitting confidential data to multiple mobile stations in a specified area at the same time, and realizes key distribution It has already been passed to the corresponding mobile station, and it is not applicable to the dynamic key acquisition requirements of a single mobile station in a secure communication system

Images