Oblivious RAM (ORAM) is a cryptographic primitive that allows a client to access memory locations from a server without revealing its access patterns. Oblivious Parallel RAM (OPRAM) is a PRAM counterpart of Oblivious RAM, i.e., it allows m clients that trust each other to simultaneously access data from a server without revealing their access patterns. The best known OPRAM scheme [1, 2] achieve...

Authenticated Key Establishment (AKE) protocols enable two entities, say a client (or a user) and a server, to share common session keys in an authentic way. In this paper, we review AKE protocols from a little bit different point of view, i.e. the relationship between information a client needs to possess (for authentication) and immunity to the respective leakage of stored secrets from a clie...

“Ajax” programming is becoming a de-facto standard for certain types of web applications, but unfortunately developing this kind of application is a difficult task. Developers have to deal with problems like a language impedance mismatch, limited execution runtime for the code running in web browser on the client-side and no integration between client and serverside parts that are developed as ...

Motivated by the need to outsource file storage to untrusted clouds while still permitting limited use of that data by third parties, we present practical protocols by which a client (the third-party) can evaluate a deterministic finite automaton (DFA) on an encrypted file stored at a server (the cloud), once authorized to do so by the file owner. Our protocols provably protect the privacy of t...

In the context of “session behaviors” for client/server systems, we propose a weakening of the compliance and sub-behaviour relations where the bias toward the client (whose “requests” must be satisfied) is pushed further with respect to the usual definitions, by admitting that “not needed” output actions from the server side can be skipped by the client. Both compliance and sub-behaviour relat...

Virtual Network Computing, or VNC, is a popular thin client application used to access files and applications on remote computers. However, VNC can suffer from significant losses in throughput when there is high latency between the client and server. These losses become especially apparent in the case of video, where updates are both large and frequent. In this work, we present a Message Accele...

Cross-site scripting attacks represent one of the major security threats in today’s Web applications. Current approaches to mitigate cross-site scripting vulnerabilities rely on either server-based or client-based defense mechanisms. Although effective for many attacks, server-side protection mechanisms may leave the client vulnerable if the server is not well patched. On the other hand, client...

Advances in multimedia computing technologies offer new approaches to support on-line accesses to information from a variety of sources such as video clips, audio, images, and books. A client-server distributed multimedia system would be a practical approach to support such functionalities. In this paper, we present the design and implementation of a client-server distributed multimedia databas...

In this paper a client-server system design and implementation for interactive multimedia documents is presented. The server provides the document scenaria, while the media objects reside in any http server. The client retrieves the scenario from the server and requests the appropriate media from the corresponding http servers. The client design covers widely the issue of interaction with exter...

The PATHWORKS for ULTRIX product integrates personal computers with the ULTRIX operating system on a local area network. The software supports both the TCP/IP protocol and the DECnet transport stacks. The design and implementation of the PATHWORKS for ULTRIX file server is based on a client-server model. The server provides file, print, mail, and time services to client PCs on the network. Netw...