In this paper, the authors propose a scheme for outsourcing Private Information Retrieval (PIR) to untrusted servers while protecting the privacy of the database owner as well as that of the database clients. They observe that by layering PIR on top of an Oblivious RAM (ORAM) data layout, they provide the ability for the database ...

Cloud computing is a distributed computing model in which clients pay for computing and data storage resources of a third-party cloud provider. Cloud applications can scale up or down almost instantly to meet real-time computational demands. Despite the economic advantages of a pay-on-demand business model, security remains a paramount concern. Cloud applications by nature must ...

Tor is a network designed for low-latency anonymous communications. Tor clients form circuits through relays that are listed in a public directory, and then relay their encrypted traffic through these circuits. This indirection makes it difficult for a local adversary to determine with whom a particular Tor user is communicating. In response, some local adversaries ...

Cloud Computing (CC) is an emerging computing paradigm that can potentially offer a number of important advantages. One of the fundamental advantages of CC is pay-as-you-go pricing model, where customers pay only according to their usage of the services. Currently, data generation is outpacing users’ storage availability, thus there is an increasing need to outsource ...