关键词: 内容中心网络, 隐私保护, 公钥加密, 安全

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