OblivShare: Towards Privacy-Preserving File Sharing with Oblivious Expiration Control

Towards Privacy Preserving Digital Rights Management Using Oblivious Transfer

Digital Rights Management (DRM) is a hot topic in digital content development. Many implementations invade users’ privacy by revealing what contents they have purchased. Preserving user’s privacy during purchasing content is necessary without doubt. Some works address the problem by providing anonymity to the user. Anonymous trade would not allow the shopkeepers to manage his customers efficien...

Privacy Preserving Information Sharing

Distributed Privacy Preserving Information Sharing

In this paper, we address issues related to sharing information in a distributed system consisting of autonomous entities, each of which holds a private database. Semi-honest behavior has been widely adopted as the model for adversarial threats. However, it substantially underestimates the capability of adversaries in reality. In this paper, we consider a threat space containing more powerful a...

Privacy-Preserving Distributed Information Sharing

In many important applications, a collection of mutually distrustful parties must share information, without compromising their privacy. Currently, these applications are often performed by using some form of a trusted third party (TTP); this TTP receives all players’ inputs, computes the desired function, and returns the result. However, the level of trust that must be placed in such a TTP is ...

Toward Privacy-Preserving Photo Sharing

With increasing use of mobile devices, photo sharing services are experiencing greater popularity. Aside from providing storage, photo sharing services enable bandwidth-efficient downloads to mobile devices by performing server-side image transformations (resizing, cropping). On the flip side, photo sharing services have raised privacy concerns such as leakage of photos to unauthorized viewers ...