Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (2): 68-71.doi: 10.1016/S1005-8885(08)60205-8

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Improvement of McCullagh-Barreto key agreement with KCI-security

WANG Xiao-fen, DONG Qing-kuan, ZHOU Yu, XIAO Guo-zhen   

  1. School of Computer Science and Engineering , University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-04-30
  • Contact: WANG Xiao-fen

Abstract:

McCullagh-Barreto key agreement protocol and its variant achieve perfect forward security and key generation center (KGC) forward security, but provide no resistance to key compromise impersonation attack (KCI attack). In this paper, we give a formal treatment of key compromise impersonation (KCI) attack and define the security notion against it. Then an variant of McCullagh-Barreto protocol is presented with only one more Hash operation. The improved protocol preserves perfect forward security and KGC forward security, and furthermore is proved to be secure against KCI attack under k-Gap-BCAA1 assumption.

Key words:

authenticated key agreement;key compromise impersonation attack;perfect forward security;KGC forward security;KCI-secure