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Lawful interception system for media security of Internet protocol (IP) multimedia subsystem (IMS) based on key management server (KMS)
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A key management and legal interception technology, applied in security devices, transmission systems, electrical components, etc., can solve problems such as the inability to implement IMS media legal interception, and the lack of media security mechanism monitoring capabilities
Active Publication Date: 2011-10-19
ZTE CORP
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[0045] Since this solution does not include KMS network elements, but only intercepts data from IMS core network elements, it does not have the ability to monitor the KMS-based media security mechanism, so it cannot implement legal monitoring of KMS-based IMS media security
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Embodiment 1
[0101] System Embodiment 1: An embodiment of the KMS-PUSH architecture of the system of the present invention, the signaling interception unit includes DF2 and DF2', and DF2 and DF2' are set independently. In this embodiment, DF2 serves as the signaling intercepting unit of the IMS network element, and DF2' serves as the signaling intercepting unit of the KMS.
[0102] Such as Figure 10 As shown, the system includes: ADMF, P-CSCF, S-CSCF, KMS, DF2, DF2' and LEMF; wherein, both P-CSCF and S-CSCF belong to IMS network elements.
[0103] ADMF, used to issue monitoring commands to KMS.
[0104] KMS is connected to ADMF and also to DF2', and is used to send monitoring data to DF2' after receiving monitoring commands from ADMF.
[0105] P-CSCF and S-CSCF are used to receive monitoring commands from ADMF and actively send monitoring data to DF2.
[0106] DF2 is used to send the monitoring data intercepted from the P-CSCF and S-CSCF to the LEMF, and the LEMF performs information a...
Embodiment 2
[0112] System embodiment two: the embodiment of the KMS-PULL architecture of the system of the present invention, and the signaling intercepting unit is the signaling intercepting unit of the IMS network element, the signaling intercepting unit of the IMS network element is still represented by DF2. Such as Figure 14 As shown, the system includes: ADMF, P-CSCF, S-CSCF, KMS, DF2 and LEMF; wherein, both P-CSCF and S-CSCF belong to IMS network elements.
[0113] DF2 is configured to intercept the session message of the intercepted data target user from the P-CSCF and the S-CSCF, and send the contents of the intercepted command to the KMS using different local strategies according to the intercepted data. It should be pointed out here that the monitoring data may also be referred to as the target user's session information.
[0114] KMS, connected to DF2, is used to analyze according to the content of the monitoring command, and return the analysis result to DF2. It should be p...
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Abstract
The invention discloses a lawful interceptionsystem for media security of an Internet protocol (IP) multimedia subsystem (IMS) based on a key managementserver (KMS). The lawful interceptionsystem comprises a push system implementation scheme and a pull system implementation scheme. A pull-mode system comprises a signaling interception unit and the KMS, wherein the signaling interception unit is used for acquiring interception data from a network element of the IMS and transmitting the interception data to the KMS; and the KMS is connected with the signaling interception unit and used for analyzing the interception data and returning an analysis result to the signaling interception unit. By adoption of the lawful interception system, the lawful interception of the media security of the IMS based on the KMS can be realized.
Description
technical field [0001] The present invention relates to network communication security technology, in particular to a key managementserver (KMS, Key Management Servicer)-based IP Multimedia Subsystem (IMS) media security lawful interception system. Background technique [0002] The KMS-based secure communication technology solution is a technical solution for end-to-end protection of media streams, which is proposed for higher security requirements that have nothing to do with signaling and transmission networks. [0003] The KMS-based secure communication technology solution is implemented based on the concept of using KMS and a ticket (Ticket), where KMS is used to provide functions such as security, user authentication, and key generation. KMS is secure on the IMS media plane Among them, as a third-party server, it mainly plays the role of issuing tickets and analyzing tickets. KMS can also be called a key management system. [0004] The KMS-based secure communication t...
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