Air interface voice ciphering startup method and system
A voice encryption and subsystem technology, applied in the field of communication, can solve problems such as call security cannot be guaranteed, and achieve the effect of improving security
Active Publication Date: 2011-05-18
CHINA TELECOM CORP LTD
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Problems solved by technology
During a call, if encryption is enabled on one end of the air interface but not on the other end, the security of the call will not be guaranteed.
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[0067] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
[0068] Such as image 3 As shown, it is a schematic flow chart of an embodiment of the air-interface voice encryption activation method of the present invention. In this embodiment, the calling side instructs the called side to perform air interface voice encryption by carrying a call initiation message (such as an IAM message) with an encryption indication, and the specific process is as follows:
[0069] Step 101, the MSC on the calling side receives the encrypted identification of the called party carried by the communication terminal on the calling side through the origination message;
[0070] Step 102, the calling side MSC sends to the called side MSC a call initiation message carrying an encryption indication for indicating the called side air interface voice encryption according to the called encryption identi...
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The invention relates to a method for starting air-interface voice encryption which comprises the steps as follows: MSC of calling side receives called encryption identification carried in origination messages by a communication terminal of the calling side; call launching messages which is carried with encryption indication and is used for indicating the air-interface voice encryption of the called side is sent to the MSC of the called side according to the called encryption identification; the MSC of the called side, after receiving the encryption indication, requests AC of the called side to calculate and deliver private long code mask; the MSC of the called side sends the private long code mask returned by the AC of the called side to BSS of the called side for starting the air-interface voice encryption of the called side. The invention also relates to a system for starting the air-interface voice encryption. The method of the invention, by identifying the called encryption identification sent by the communication terminal of the calling side, indicates the MSC of the called side to obtain the private long code mask to start the air-interface voice encryption of the called side, the air-interface voice encryption of the called side can be started only requiring that the called side supports encryption function, thus enhancing the safety of communication air-interface.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to an air interface voice encryption start method and system. Background technique [0002] In the existing Code Division Multiple Access (CDMA) mobile communication network, if there is a need for communication security, communication terminals (MobileStation, referred to as MS) and base station subsystems (Base Station System, referred to as BSS) can ) to provide certain confidentiality by modulating the voice stream with a public long code mask. [0003] Since the public long code mask is only a simple transformation of the electronic serial number (Electronic Serial Number, ESN for short) of the communication terminal, it is easy to be cracked and the confidentiality is not strong. Therefore, in the CDMA network standard, it is proposed to use a private long code mask to encrypt the voice service flow, because the private long code mask is shared by the user through the C...
Claims
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IPC IPC(8): H04L9/32H04W12/02H04W84/04
Inventor 林奕琳李宝荣杨维忠孙宇张琳峰龙彪林衡华肖海
Owner CHINA TELECOM CORP LTD