Key Refresh During Cell Handover in LTE Featuring One-Hop Forward Security
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    Abstract:

    Long Term Evolution (LTE) is the next-generation mobile communication system beyond 3G, whose security is predominant for the successful deployment of such networks. In this paper, we address the cryptographic key management during local cell handovers known as X2 handovers in LTE, which currently only achieves two-hop forward security. An enhanced key refresh scheme is proposed, which features the desired one-hop forward security. Our proposal not only makes up for the deficiency in the standardized LTE technical specification, but also retains all existent key materials and parameters without incurring extra communication costs. Therefore, it is technically feasible for the standardized key refresh to be smoothly upgraded to the enhanced proposal.

    Reference
    1 Astély D, Dahlman E, Furuskär A, et al.LTE: the evolution of mobile broadband.IEEE Communications Magazine, 2009, 47: 44-51.
    2 Forsberg D, Huang L, Tsuyoshi K, Alanara S.Enhancing security and privacy in 3GPP E-UTRAN radio interface, in proc.18th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC07).2007.1-5.
    3 Forsberg D.LTE key management analysis with session keys context.Computer Communications, 2010,33:1907-1915.
    4 3GPP, 3GPP System Architecture Evolution (SAE), Security architecture, 3GPP TS 33.401 v9.4.0, 2010.
    5 3GPP, Evolved Universal Terrestrial Radio Access (E-UTR A) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN), Overall description, 3GPP TS 36.300 v10.0.0, 2010.
    6 3GPP, Evolved Universal Terrestrial Radio Access Network (E-UTRAN), architecture description, 3GPP TS 36.401 v9.2.0, 2010.
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李泰成,何莉,吴槟.具有一跳前向安全性的X2切换密钥更新协议.计算机系统应用,2011,20(8):67-71

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  • Received:November 14,2010
  • Revised:November 25,2010
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