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Secure and efficient group key agreement protocols.

机译：安全高效的组密钥协商协议。

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摘要

Due to the increased popularity of group-oriented applications and protocols, securing group communication has become a critical networking issue and has received much attention in recent years. A secure and efficient group key management protocol presents one of the most fundamental challenges in group communication security. While key transport protocols may be appropriate for key establishment in one-to-many applications, many collaborative applications require distributed key agreement protocols. Proposals for key agreement protocols that have been published so far do not scale for large size groups. Moreover, the security of most of these protocols has been flawed. This thesis considers the problem of group key agreement protocols from two points of view: efficiency and security. Regarding the efficiency, a novel framework based on the extension of the Diffie-Hellman key exchange protocol is proposed. The efficiency of this framework comes from the distribution of the group members into size-bounded clusters. Using clustering improves the protocol efficiency (in both communication and computation costs), provides fault-tolerance and supports heterogenous systems. A modification to these protocols has been presented to address the problem of key agreement within ad hoc wireless networks. Regarding protocol security, a new approach for key agreement protocols analysis is proposed. To demonstrate the approach, a formal analysis of one of the existing key agreement protocols has been presented where some practical attacks have been identified. It has been shown that the possibility of most of these attacks is due to the use of improper techniques to supply key authentication. Different solutions to address these attacks have been proposed. These solutions provide authenticity and are implemented within the steps required by the key agreement protocol. These authenticated protocols are based on an entanglement of both the ephemeral key and the long-term key to provide authenticated key agreement protocols.
机译：由于面向组的应用程序和协议的日益普及，保护组通信已成为一个关键的网络问题，并且近年来受到了广泛的关注。安全高效的组密钥管理协议是组通信安全中最基本的挑战之一。虽然密钥传输协议可能适用于一对多应用程序中的密钥建立，但许多协作应用程序都需要分布式密钥协议协议。迄今为止，已发布的关键协议协议的建议不适用于大型团体。而且，大多数这些协议的安全性都有缺陷。本文从效率和安全性两个角度考虑了组密钥协商协议的问题。关于效率，提出了一种基于Diffie-Hellman密钥交换协议扩展的新颖框架。该框架的效率来自于将组成员分配到受大小限制的集群中。使用群集可提高协议效率（在通信和计算成本上），提供容错能力并支持异构系统。已经提出了对这些协议的修改以解决自组织无线网络内的密钥协议的问题。关于协议安全性，提出了一种新的密钥协议协议分析方法。为了演示该方法，已经对现有的关键协议协议之一进行了正式分析，其中发现了一些实际的攻击。已经表明，大多数此类攻击的可能性是由于使用了不正确的技术来提供密钥验证所致。已经提出了解决这些攻击的不同解决方案。这些解决方案提供了真实性，并在密钥协商协议要求的步骤内实施。这些经过身份验证的协议基于临时密钥和长期密钥的纠缠，以提供经过身份验证的密钥协商协议。

著录项

  • 作者

    Abdel-Hafez, Ahmed.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 160 p.
  • 总页数 160
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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