Abstract: As a new network architecture, Content-Centric Networking（CCN） has become one of the most promising potential of network architectures, which makes the communication transform from the end-to-end model based on IP address in to the pattern of content-based. CCN network requester obtains the desired content without considering where it exists, what the advantage of the CCN is the router can cache requested content. However, the privacy protection of the content, requester and publisher is a new challenge to CCN. This paper presents a multi-layer public-key encryption scheme which can take the advantages of caching of the CCN to prevent illegal interest packet requesting and at the same time reduce the burden of the router and the requester in case of storing a large number of keys. It improves the network security.

Key words: Content-Centric Networking（CCN）, privacy protection, public-key encryption, security

摘要： 内容中心网络（Content-Centric Networking，CCN）作为一种新型的网络架构，将通信从基于IP地址的端到端的模式转变为基于内容的模式，成为未来网络最有发展潜力的网络架构之一。CCN网络请求者获得所需内容不用考虑内容存在何处，该网络的优势在于可以在路由器中缓存已请求过的内容。然而，内容、请求者以及发布者三者的隐私保护对于CCN网络是一个新的挑战。提出一种基于多层加密机制的内容中心网络隐私保护策略，在发挥CCN网络缓存优势的情况下，能够防止非法兴趣包请求，同时减轻了路由器以及请求者需要存储大量密钥的负担，提高网络的安全性。

关键词: 内容中心网络, 隐私保护, 公钥加密, 安全