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Privacy-Aware Caching in Information-Centric Networking

机译：隐私感知通过以信息为中心的网络缓存

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摘要

Information-Centric Networking (ICN) is an emerging networking paradigm where named and routable data (content) is the focal point. Users send explicit requests (interests) which specify content by name, and the network handles routing these interests to some entity capable of satisfying them with the appropriate data response (producer). One key feature of ICN is opportunistic in-network content caching. This property facilitates efficient content distribution by reducing bandwidth consumption, lessening network congestion, and improving the content retrieval latency by users (consumers). Unfortunately, the same feature is also detrimental to privacy of content consumers and producers. Simple to implement, and difficult to detect, timing attacks can exploit ICN routers as "oracles" and allow an adversary to learn whether a nearby consumer recently requested certain content. The attack leverages a timing side channel that relies on router caches and is implemented by requesting a few packets from each piece of content being probed. Similarly, probing attacks that target content producers can be used to discover whether certain content has been recently distributed. After analyzing the scope and feasibility of such attacks, we propose and evaluate some efficient countermeasures that offer quantifiable privacy guarantees while retaining the benefits of ICN.
机译：以信息为中心的网络（ICN）是一个新兴网络范式，其中命名和可路由数据（内容）是焦点。用户通过名称发送指定内容的显式请求（兴趣），并且网络处理将这些兴趣路由到能够满足适当的数据响应（生产者）的某些实体。 ICN的一个关键特征是机会提供的网络内容缓存。该属性通过降低带宽消耗，减少网络拥塞和提高用户（消费者）的内容检索延迟来促进高效的内容分发。不幸的是，同样的特征也不利于内容消费者和生产者的隐私。易于实施，难以检测，时序攻击可以利用ICN路由器作为“oracles”，并允许对手了解附近的消费者是否最近要求某些内容。该攻击利用依赖于路由器缓存的定时侧通道，并通过请求探测的每条内容的几个数据包来实现。类似地，探测目标内容生产者可以用于发现最近分发了某些内容的探测攻击。在分析此类袭击的范围和可行性之后，我们提出并评估了一些有效的对策，以提供可量化的隐私保障，同时保留ICN的福利。

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