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Method and system for key generation during handover

A technology for handover process and key generation, which is applied in electrical components, security devices, wireless communications, etc., can solve problems such as hidden dangers of communication system security, improve security, and avoid illegally obtaining the key KeNB of the next hop. Possibilities, Effects of Guaranteed Forward Safety

Inactive Publication Date: 2018-03-30
ZTE CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The source eNB can derive the key KeNB when the next hop of the UE changes, which may be used, thus causing security risks to the communication system

Method used

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  • Method and system for key generation during handover
  • Method and system for key generation during handover
  • Method and system for key generation during handover

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Embodiment Construction

[0056] The basic idea of ​​the present invention is: during the X2 handover process, the source eNB no longer derives the next hop key for the target eNB, and the source eNB only provides the next hop counter NCC value for the target eNB. The target eNB uses the NCC value to keep the NHs in the UE and MME entities synchronized, so that the same KeNB is saved in the UE and the MME. The target eNB uses the NCC value to apply to the MME for the same KeNB as the UE, so as to keep its own KeNB consistent with the UE's KeNB. During the handover process, the NH no longer leaves the MME, the eNB cannot obtain the NH, and the eNB has no ability to deduce the NH (the calculation of the NH must have Kasme), so the source eNB cannot obtain the KeNB of the target eNB in ​​the next hop transition, which solves the forward security question.

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following examples are given and the...

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Abstract

The present invention discloses a key generation method and system in the handover process. The method includes: in the UE handover process, the network side uses the next hop parameter NH to generate the next hop key KeNB; wherein, the network side The generated NH does not notify the base station; the network side and the UE side respectively use the next hop counter NCC value notified by the target base station to synchronize the next hop key KeNB; the network side uses the generated next hop The changed key KeNB notifies the target base station. Since the base station cannot obtain the NH, it cannot generate the next-hop key KeNB, which avoids the possibility of illegally obtaining the next-hop key KeNB and ensures forward security. The invention greatly improves the security of the communication system.

Description

technical field [0001] The invention relates to key generation technology, in particular to a method and system for key generation during handover. Background technique [0002] The Evolved Packet System (EPS, Evolved Packet System) of the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) is composed of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) and the EPS core network (Evolved Packet Core) composition. E-UTRAN is composed of base station equipment-evolved Node B (eNB, Evolved Node B) and core network equipment-mobility management entity (MME, Mobility Management Entity). A user equipment (UE, User Equipment) communicates with an eNB through a wireless air interface, and communicates with an MME through the eNB. [0003] In the communication protocol architecture of the Long Term Evolution (LTE, Long Term Evolution) system, the protocol layer is divided into an access str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/04H04W92/12H04W92/20H04W12/041H04W12/106
CPCH04W36/0038H04W12/041
Inventor 曹岚健余万涛
Owner ZTE CORP
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