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会话初始化协议(SIP)提供了认证和协商会话密钥,能保证后续会话的安全。2010年,Yoon等(YOONE-J,YOO K-Y.A three-factor authenticated key agreement scheme for SIP on elliptic curves.NSS10:4th InternationalConference on Network and System Security.Piscataway:IEEE,2010:334-339)提出一种新的三要素SIP认证密钥