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A method and system for deriving an air interface key

An air interface key and key technology, applied in the field of air interface key derivation, can solve problems such as increasing complexity and system overhead, and achieve the effects of reducing complexity, reducing system overhead, and improving operational efficiency

Active Publication Date: 2016-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, random numbers and counter values ​​need to be transmitted between the network and users, which requires modification of the existing UMTS protocol, which undoubtedly increases system overhead and complexity

Method used

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  • A method and system for deriving an air interface key
  • A method and system for deriving an air interface key
  • A method and system for deriving an air interface key

Examples

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specific Embodiment

[0073] This embodiment describes an example of distributing an air interface key between the user equipment and the base station through a security mode command flow, as shown in image 3 shown. HSPA+ encryption key CK U and integrity key IK U Generated at NodeB+. At this time, SGSN+ or MSC / VLR+ needs to set K ASMEU Sent to NodeB+ in a secure mode command message. The steps are as follows:

[0074] Step 301, SGSN+ or MSC / VLR+ determines the allowed encryption algorithm set and integrity algorithm set, and calculates K according to the encryption key CK and integrity key IK received from the HSS ASMEU .

[0075] K ASMEU The calculation method of is the same as that in the embodiment, and will not be repeated here.

[0076] This step is optional for the security mode command flow triggered by the mobility of the user equipment in idle mode. If there is still valid K stored at SGSN+ or MSC / VLR+ ASMEU , you can directly use the K ASMEU , without recomputing.

[0077] S...

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Abstract

The invention discloses a method and system for deriving an air interface key. The method includes: a core network node sends an intermediate key KASMEU to an enhanced node B through a key distribution message, and the enhanced node B uses the intermediate key and the universal mobile The existing parameters of the communication system network calculate the encryption key CKU and the integrity key IKU. For the derivation of the air interface key in the current HSPA+ security, there is a problem of increasing complexity. The air interface key derivation method proposed by the invention does not need to introduce other parameters, and can directly use the existing UMTS network parameters to derive air interface keys CKU and IKU. The present invention uses existing parameters to perform key derivation, which can not only solve the security problem of key generation, improve system security and reduce security risks, but also reduce system overhead, reduce complexity, and improve user experience and operator operating efficiency .

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for deriving an air interface key. Background technique [0002] 3GPP (3rdGenerationPartnershipProject, third-generation partnership project) adopted Orthogonal Frequency Division Multiplexing (OFDM for short) and Multiple-Input Multiple-Output (Multiple-InputMultiple-Output, MIMO) technologies in Release7 to complete HSDPA (High Speed ​​Downlink Packet Access, high-speed Downlink packet access) and HSUPA (HighSpeedUplinkPacketAccess, high-speed uplink packet access) future evolution road HSPA+. HSPA+ is an enhanced technology of 3GPPHSPA (including HSDPA and HSUPA), which provides HSPA operators with a low-complexity and low-cost smooth evolution path from HSPA to LTE. [0003] HSPA+ improves the peak data rate and spectral efficiency by adopting high-order modulation (such as downlink 64QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/04H04W12/0431
CPCH04L9/083H04L9/0869H04L2209/80H04L2463/062H04W88/08H04W92/14H04W12/0431
Inventor 冯成燕甘露
Owner ZTE CORP
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