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Method and system for generating cryptographic key

A key generation and key technology, applied in the field of communication, to achieve the effect of strengthening security

Inactive Publication Date: 2008-11-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to propose a key generation method and system for the defect of generating the same IK and CK when moving between different access systems in the prior art to improve security

Method used

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  • Method and system for generating cryptographic key
  • Method and system for generating cryptographic key
  • Method and system for generating cryptographic key

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] image 3 It is a signaling flowchart of a key generation method according to Embodiment 1 of the present invention. This embodiment shows a flowchart of a key generation method for UE handover from E-UTRAN to UTRAN, including the following steps:

[0041] Step 302, the source eNB makes a handover decision.

[0042] Step 304, the source eNB sends a handover request to the source MME.

[0043] Step 306, after receiving the handover request, the source MME uses K ASME And NAS counter, generate IK, CK.

[0044] Step 308, the source ME forwards the relocation request to the target SGSN, and sends IK and CK at the same time.

[0045] Step 310, the target SGSN sends a relocation request to the target RNC (Radio Network Controller), and at the same time sends IK and CK.

[0046] Step 312, the target RNC starts to use IK and CK.

[0047] Step 314, the target RNC sends a relocation request confirmation to the target SGSN.

[0048] Step 316, the target SGSN forwards the relo...

Embodiment 2

[0058] Figure 4 It is a signaling flowchart of a key generation method according to Embodiment 2 of the present invention, and this embodiment shows a signaling flowchart of a key generation method according to a preferred embodiment of the present invention. Such as Figure 4 As shown, this embodiment shows a flowchart of a key generation method for UE handover from E-UTRAN to GERAN, and this embodiment includes:

[0059] In step 402, the source eNB initiates a handover decision.

[0060] Step 404, the source eNB sends a handover request to the source MME.

[0061] Step 406, the source MME uses K ASME and the value of the NAS counter generate IK, CK.

[0062] Step 408, the source MME forwards the relocation request to the target SGSN, and sends IK and CK to the target SGSN at the same time.

[0063] Step 409, the target SGSN uses IK, CK to generate Kc.

[0064] In step 410, the target SGSN sends a packet domain switching request to the target BSS, and sends Kc at the s...

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Abstract

The invention provides a generation method of a secret key, and the users equipment is updated to universal terrestrial radio access networks or global system for mobile communication or enhanced data rate for GSM evolved radio access network from the switching or tracking area of evolved terrestrial radio access networks; wherein, mobility management entities and the users equipment use secret keys needed by the generation of universal terrestrial radio access networks or the global system for mobile communication or the enhanced data rate GSM evolved radio access network through prefixing parameters which comprise the root key of the evolved terrestrial radio access networks and the value of a non-access stratum counter. The method of the invention also provides a secret key generation system for generating the secret key.

Description

technical field [0001] The invention relates to key generation technology in the communication field, in particular to a key generation method and system when moving between different systems. Background technique [0002] The Evolved Packet System (EPS) of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP for short) consists of the Evolved UMTS Terrestrial Radio Access Network (E-UTRAN for short) and the EPS An evolved packet core network (Evolved Packet Core, EPC for short). The base station device in the E-UTRAN is an eNB (evolved Node B, evolved Node B). EPC can support users from Global System for Mobile Communications or Enhanced Data Rate GSM Evolution Radio Access Network (GSM / EDGE RadioAccess Network, that is, Global System for Mobile Communication / Enhanced DataRate for GSM Evolution radio access network, referred to as GERAN) and Universal Terrestrial Wireless Access to an access network (Universal Terrestrial Radio Access Network, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/18H04L12/56H04Q7/38H04Q7/22H04W12/041H04W88/14
CPCH04W12/04H04W88/14H04L2463/061H04W12/041
Inventor 甘露
Owner ZTE CORP