网络延迟和时钟漂移对时间驱动密钥排序的量化影响

G. Xie, C. Irvine, T. Levin
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引用次数: 5

摘要

时间驱动密钥排序(TKS)是一种密钥管理技术,它根据一天中的时间同步一组通信主体使用的会话密钥。这种相对低成本的会话密钥同步方法已用于具有低端通信设备的专用分布式系统,其中会话稀疏,每个会话跨越由少量消息组成的短时间周期。在本文中,我们描述了TKS如何在涉及高速计算机网络的几种场景中发挥作用。更重要的是,我们提出了TKS的性能模型,并进行了详细的分析,以确定时钟漂移和网络延迟对所需密钥刷新率的影响。我们给出了确定适当的键刷新率范围的确切条件,并证明了导出的条件足以确保数据既受保护又可交付。有趣的是,这些条件可以用来获得一个键刷新率,该刷新率可以在系统中的其他参数固定后容忍最大数量的时钟漂移。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantifying effect of network latency and clock drift on time-driven key sequencing
Time-driven key sequencing (TKS) is a key management technique that synchronizes the session key used by a set of communicating principals based on time of day. This relatively low cost method of session key synchronization has been used in specialized distributed systems with low-end communicating devices where sessions are sparse and each session spans a short time period comprising a small number of messages. In this paper, we describe how TKS may be useful in several scenarios involving high speed computer networks. More importantly, we present a performance model of TKS and conduct a detailed analysis to determine the impact of clock drift and network latency on the required key refresh rate. We give the exact conditions for determining the range of adequate key refresh rates, and demonstrate that the derived conditions are sufficient to ensure that data are both protected and deliverable. Interestingly, these conditions may be used to obtain a key refresh rate that can tolerate a maximum amount of clock drift after other parameters in the system are fixed.
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