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Lawful interception system for media security of Internet protocol (IP) multimedia subsystem (IMS) based on key management server (KMS)

A technology for key management and legal interception, which is applied to security devices, transmission systems, electrical components, etc., and can solve the problems of lack of monitoring capability of media security mechanism and inability to implement legal interception of IMS media.

Active Publication Date: 2015-06-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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  • Lawful interception system for media security of Internet protocol (IP) multimedia subsystem (IMS) based on key management server (KMS)
  • Lawful interception system for media security of Internet protocol (IP) multimedia subsystem (IMS) based on key management server (KMS)
  • Lawful interception system for media security of Internet protocol (IP) multimedia subsystem (IMS) based on key management server (KMS)

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Experimental program
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Effect test

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] like 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 asso...

Embodiment 2

[0112] System embodiment 2: the embodiment of the KMS-PULL architecture of the system of the present invention, and the signaling interception unit of the IMS network element is the signaling interception unit of the IMS network element, and the signaling interception unit of the IMS network element is still represented by DF2. like 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 interception data target user from the P-CSCF and the S-CSCF, and send the contents of the interception command to the KMS using different local strategies according to the interception 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 r...

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Abstract

The invention provides a lawful interception system for IP Multimedia Subsystem (IMS) media security based on the Key Management Server (KMS), which includes two system implementation schemes of PUSH and PULL. Wherein, the system of PULL mode includes: a signaling interception unit, for obtaining the interception data from the IMS network element, and sending it to the KMS; KMS is connected with the signaling interception unit, for resolving the interception data and returning the resolution result to the signaling interception unit. By using the invention, the lawful interception for IMS media security based on KMS can be implemented.

Description

technical field [0001] The present invention relates to network communication security technology, in particular to a key management server (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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04W12/02H04W12/04
CPCH04L63/306H04M3/2281H04L65/1016
Inventor 朱允文田甜韦银星高峰
Owner ZTE CORP