Enabling Secure and Efficient Video Delivery Through Encrypted In-Network Caching

Abstract

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 fullycontrolled 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.Index Terms-Secure video delivery, encrypted in-network caching, secure redundancy elimination.

A Privacy-aware Stackelberg Game Approach for Joint Pricing, Investment, Computation Offloading and Resource Allocation in MEC-enabled Smart Cities

“…Currently, there are mainly three kinds of privacy protection methods. The first kind is cryptography-based methods, e.g., encryption transmission [1], [17], [18], secured multi-party computing [34] and blockchain-based methods [35]- [37]. For example, Yuan et al [17] proposed an encrypted video delivery protocol to prevent external attackers from accessing user privacy at in-network caching.…”

“…Second, users' request traces will be automatically captured by content providers when users fetch specific video content. Encryption-based methods (e.g., [1], [17], [18]) cannot conceal request privacy since user requests must be visible to content providers for available video streaming. Third, the cost to protect video requests is much heavy because each individual video request consumes additional communication traffic bringing extra overhead to the CP and EC.…”

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“…Yuan et al [54] first combined searchable encryption with efficient video delivery. They proposed a secure RE method to perform high-efficiency video delivery through encrypted in-network caching without revealing sensitive information about the videos.…”

A Privacy-Preserving Protocol for Network-Neutral Caching in ISP Networks

“…Ref. [9] proposes two different approaches for ISPs to efficiently cache contents in presence of encryption. In the first approach, the ISP infers information about popularity by analyzing the occurrences of pseudonomys associated with the contents and selects the contents to be cached accordingly.…”