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Universally composable three-party password-authenticated key exchange with contributiveness

机译:具有贡献的通用可组合的第三方密码验证密钥交换

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摘要

Three-party password-authenticated key exchange (3PAKE) allows two clients, each sharing a password with a trusted server, to establish a session key with the help of the server. It is a quite practical mechanism for establishing secure channels in a large communication network. However, most current 3PAKE protocols are analyzed in security models that do not adequately address protocol composition problem. In this paper, an ideal functionality for 3PAKE within the universal composability framework is defined, which not only provides security guarantees under arbitrary composition with other protocols but also achieves contributiveness and explicit authentication. Moreover, we propose a generic construction of contributory 3PAKE protocol and prove that it securely realizes the ideal functionality in the static corruption model. Copyright (C) 2014 John Wiley & Sons, Ltd.
机译:三方密码验证密钥交换(3PAKE)允许两个客户端(分别与受信任的服务器共享一个密码)在服务器的帮助下建立会话密钥。这是在大型通信网络中建立安全通道的相当实用的机制。但是,目前大多数3PAKE协议都是在安全模型中进行分析的,因此无法充分解决协议组成问题。在本文中,定义了通用可组合性框架内3PAKE的理想功能,该功能不仅可以与其他协议在任意组合下提供安全保证,而且还可以实现贡献性和显式身份验证。此外,我们提出了贡献性3PAKE协议的通用构造,并证明了它可以安全地实现静态损坏模型中的理想功能。版权所有(C)2014 John Wiley&Sons,Ltd.

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