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A distributed public key caching scheme in large wireless networks.

机译：大型无线网络中的分布式公钥缓存方案。

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摘要

When asymmetric cryptography techniques are used in wireless networks, the public keys of the nodes need to be widely available and signed by a Certificate Authority (CA). However, the existence of a single CA in large wireless networks such as mobile ad hoc networks and wireless sensor networks can lead the hotspot problem and become a security weakness. In this work, we propose a distributed technique to cache the public keys on regular nodes. Due to the limited memory size that each node is allowed to dedicate for key caching, only some keys can be cached. In our proposed technique, each node caches the public keys of a mix of local and remote nodes. The local nodes are defined as the nodes within the same neighborhood according to the transmission range, while the remote nodes are the ones outside the range. Access to the public keys of other nodes is possible based on a chain of trust. Multiple copies of public keys from different chains of trusted nodes provide fault tolerance. We explain our technique in detail and investigate its salient features in this work. An interesting observation is the need to balance caching public keys of local nodes and remote nodes. We studied the optimum local/remote public key caching ratios for different networks via investigating the availability of the number of required public key copies. These simulation results showed that by balancing the caching public keys with the optimum ratios, the availability of the required public keys kept increasing and finally became stable. We also did the simulation about studying the number of hops to find the first copies of required public keys. The results showed how local/remote ratios affected the minimum number of hops for reaching the first copies.
机译：当在无线网络中使用非对称密码技术时，节点的公共密钥需要广泛可用并由证书颁发机构（CA）签名。但是，在大型无线网络（例如，移动自组织网络和无线传感器网络）中存在单个CA可能会导致热点问题，并成为安全漏洞。在这项工作中，我们提出了一种分布式技术，可以在常规节点上缓存公共密钥。由于允许每个节点专用于密钥缓存的内存大小有限，因此只能缓存某些密钥。在我们提出的技术中，每个节点都缓存本地和远程节点混合的公共密钥。根据传输范围将本地节点定义为同一邻域内的节点，而将远程节点定义为该范围之外的节点。基于信任链，可以访问其他节点的公钥。来自不同受信任节点链的公用密钥的多个副本提供了容错能力。我们将详细解释我们的技术，并在这项工作中研究其显着特征。一个有趣的观察是需要平衡缓存本地节点和远程节点的公钥。我们通过调查所需的公共密钥副本数量的可用性，研究了不同网络的最佳本地/远程公共密钥缓存比率。这些仿真结果表明，通过以最佳比率平衡缓存的公用密钥，所需的公用密钥的可用性不断增加，并最终变得稳定。我们还进行了有关研究跃点数的仿真，以查找所需公钥的第一个副本。结果显示，本地/远程比率如何影响到达第一份副本的最小跃点数。

著录项

  • 作者

    Kong, Yuan.;

  • 作者单位

    The University of North Carolina at Greensboro.;

  • 授予单位 The University of North Carolina at Greensboro.;
  • 学科 Computer Science.
  • 学位 M.S.
  • 年度 2010
  • 页码 33 p.
  • 总页数 33
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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