Enabling secure and efficient video delivery through encrypted in-network caching

Xingliang Yuan, Xinyu Wang, Jinfan Wang, Yilei Chu, Cong Wang, Jianping Wang, Marie Jose Montpetit, Shucheng Liu

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)


In-network content caching has been a natural trend in emerging network architectures to handle the exponential growth of video traffic. However, due to the potentially wide attacking surfaces, caching video content in the increasingly untrusted networked environment inevitably raises new concerns on user privacy exposure and unauthorized video access. Existing encrypted protocols like HTTPs either fall short of fully leveraging in-network caching or require decrypting the traffic in the middle without guaranteeing the end-to-end security. In this paper, we present a new networked system for efficient encrypted video delivery while preserving the benefits of in-network caching. As video chunks are encrypted before distribution, we first design a compact, efficient, yet encrypted video fingerprint index to empower the network with a fully controlled capability of locating the cached encrypted chunks for given encrypted requests. We then explain how to deploy the encrypted design in our proposed architecture and present a secure redundancy elimination protocol to enable fast video delivery via leveraging cached encrypted chunks. We further discuss the full support of cache management, adaptive video delivery, and video access control. Rigorous analysis and prototype evaluations demonstrate the security, efficiency, and effectiveness of the design.

Original languageEnglish
Article number7485895
Pages (from-to)2077-2090
Number of pages14
JournalIEEE Journal on Selected Areas in Communications
Issue number8
Publication statusPublished - Aug 2016
Externally publishedYes


  • encrypted in-network caching
  • secure redundancy elimination
  • Secure video delivery

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