FairCMS: Cloud Media Sharing with Fair Copyright Protection
Xiangli Xiao, Yushu Zhang, Leo Yu Zhang, Zhongyun Hua, Zhe Liu, Jiwu, Huang

TL;DR
FairCMS introduces two cloud media sharing schemes that balance privacy, copyright protection, and efficiency using proxy re-encryption and fingerprinting, with demonstrated feasibility.
Contribution
The paper proposes two novel cloud media sharing schemes, FairCMS-I and FairCMS-II, addressing privacy, copyright, and user rights with different security and efficiency trade-offs.
Findings
FairCMS schemes achieve optional IND-CPA security.
They provide high cloud-side efficiency.
They enable privacy-preserving outsourcing of fingerprinting.
Abstract
The onerous media sharing task prompts resource-constrained media owners to seek help from a cloud platform, i.e., storing media contents in the cloud and letting the cloud do the sharing. There are three key security/privacy problems that need to be solved in the cloud media sharing scenario, including data privacy leakage and access control in the cloud, infringement on the owner's copyright, and infringement on the user's rights. In view of the fact that no single technique can solve the above three problems simultaneously, two cloud media sharing schemes are proposed in this paper, named FairCMS-I and FairCMS-II. By cleverly utilizing the proxy re-encryption technique and the asymmetric fingerprinting technique, FairCMS-I and FairCMS-II solve the above three problems with different privacy/efficiency trade-offs. Among them, FairCMS-I focuses more on cloud-side efficiency while…
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Taxonomy
TopicsAdvanced Steganography and Watermarking Techniques · Cryptography and Data Security · Privacy-Preserving Technologies in Data
