Ofer Hermoni

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—Peer to peer file sharing is 'booming', but meanwhile censorship of these networks and prosecution of users that share censored content are growing just as quickly. In this paper, we propose a novel notion of deniability as an easy and efficient method for users to avoid censorship and prosecution. The fundamental concept is that a given data element,(More)
—The flourishing of Peer-to-Peer (P2P) applications has encouraged extensive research on end-to-end anonymity. In particular, interactive services such as VoIP and instant messaging are becoming extremely popular and require low latency. Preserving the anonymity of users in such services is becoming a major challenge. While existing schemes provide(More)
We introduce the notion of digital-arbitration which enables resolving disputes between servers and users with the aid of arbitrators. Arbitrators are semi-trusted entities in the social network that facilitate communication or business transactions. The communicating parties, users and servers, agree before a communication transaction on a set of(More)
Traditional public key infrastructure is an example for basing the security of communication among users and servers on trusting a Certificate Authority (CA) which is a Trusted Authority (TA). A traditional, centralized CA or TA should only be involved in a setup stage for communication, or risk causing a bottleneck. Peer to peer assistance may replace the(More)
Many anonymous peer-to-peer (P2P) file sharing systems have been proposed in recent years. One problem that remains open is how to protect the anonymity of <i>all</i> participating users, namely, reader, server and publisher. In this work we propose a novel solution for a P2P file sharing system. Our solution provides overall anonymity to all participating(More)
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