The advent of the big data era drives the media data owner to seek help from the cloud platform for data hosting and sharing. Sharing media data through the cloud suffers three key security/privacy problems including the leakage of data privacy, the infringement on the data owner's copyright, and the infringement on the user's right. Existing techniques such as attribute-based encryption, proxy re-encryption, and asymmetric fingerprinting are insufficient to solve all three problems. In this work, we consider the scheme design of being capable of addressing these three problems simultaneously. Associating the additive homomorphic proxy re-encryption technique with the asymmetric fingerprinting based on user-side embedding, we bring forward two novel cloud media sharing schemes: CREAMS-I and CREAMS-II. Among them, CREAMS-II has better security performance, while CREAMS-I has more outstanding cloud-side efficiency. It is demonstrated that both proposed schemes can solve the existing three problems well and have advantages over existing peers. In addition, these two schemes can also be seen as an instantiation of privacy-preserving outsourcing of asymmetric fingerprinting, from which the owner can reap substantial savings in local storage, communication, and computing resources. The feasibility of CREAMS-I and CREAMS-II is also verified by simulation.
翻译:大数据时代的到来促使媒体数据所有者从云层平台寻求数据托管和共享方面的帮助。通过云层共享媒体数据有三大安全/隐私问题,包括数据隐私泄露、数据所有者版权受侵犯和用户权利受侵犯。基于属性的加密、代理再加密和不对称指纹等现有技术不足以解决所有三个问题。在这项工作中,我们认为方案设计能够同时解决这三个问题。将添加的同质代理再加密技术与基于用户侧嵌入的不对称指纹处理,我们提出了两个新的云层共享方案:CRIAMS-I和CRIEAMS-II。 其中,CREAMS-II有更好的安全性能,而CRIAMS-I的云端效率则更突出。这证明,两种拟议方案都能很好地解决现有的三个问题,并且比现有的同龄人更有利。此外,这两种方案还可以被视为一种即时即时维护隐私的对不对称指纹的重新加密技术,而CRIMS的存储和CRAS的存储也是CRAS的当地存储能力。