Due to its low cost, robustness, flexibility and ubiquitous nature, cloud computing is changing the way entities manage their data. However, various privacy concerns arise whenever potentially sensitive data is outsourced to the cloud. This paper presents a novel approach for coping with such privacy concerns. The proposed scheme prevents the cloud server from learning any possibly sensitive pl...

IKEv2 is a protocol for exchanging keys in the IPsec architecture. In it's specification, EAP was proposed as one of the authentication mechanisms. EAP is extensible authentication protocol based on client/server architecture and allows introduction of additional EAP methods. Implementation of this protocol is complex and in our project it was decided to include one of the existing implementati...

E-mail is a mission-critical communication function for virtually all institutions. Modern e-mail employs a servercentric design, in which the user is critically dependent on her mail server. In this paper we present a peer-to-peer (P2P) email architecture that eliminates the need to rely on a single server and boosts the resilience of email against any kinds of attacks. Our architecture also p...

UNLABELLED PubMed-EX is a browser extension that marks up PubMed search results with additional text-mining information. PubMed-EX's page mark-up, which includes section categorization and gene/disease and relation mark-up, can help researchers to quickly focus on key terms and provide additional information on them. All text processing is performed server-side, freeing up user resources. AVA...

We consider the k-server problem, with the additional assumptions that (1) the adversary makes only lazy moves (if it has a free server, not matched with our server, then it puts a request on such a server without moving it), and (2) whenever all our servers are matched with his servers, then he announces it to our algorithm. We show a k-competitive algorithm against such an adversary. As with ...

Video servers must use large disk arrays to provide the huge amount of storage capacity and bandwidth needed. As the number of disk drives increases, the probability of a video server failure increases too. We propose a redundancy scheme that uses both RAID 5 techniques and mirroring to make a video server tolerant against all single disk failures. Our approach provides a unified framework for ...

Distributed Denial of Service (DDoS) attacks exploit the acute imbalance between client and server work loads to cause devastation to the service providers. We pro pose a distributed gateway architecture and a payment protocol that imposes dynamically changing prices on both network, server, and information resources in order to push some cost of initiating service requests — in terms of moneta...

In a scalable server that supports the retrieval and display of continuous media audio and video clips both the number of simultaneous displays and the expected startup latency of a dis play increases as a function of additional disk bandwidth This paper describes object replication and request migration as two alternative techniques to minimize startup latency In addition to developing analyti...