This article surveys the current state of security issues and available defense mechanisms
regarding popular online social networks. It covers a wide variety of attacks and the …

Lack of cooperation (free riding) is one of the key problems that confronts today's P2P
systems. What makes this problem particularly difficult is the unique set of challenges that …

A growing number of online services, such as Google, Yahoo!, and Amazon, are starting to
charge users for their storage. Customers often use these services to store valuable data …

The field of peer-to-peer reputation systems has exploded in the last few years. Our goal is
to organize existing ideas and work to facilitate system design. We present a taxonomy of …

This paper describes a general approach to constructing cooperative services that span
multiple administrative domains. In such environments, protocols must tolerate both …

A growing number of online service providers offer to store customers' photos, email, file
system backups, and other digital assets. Currently, customers cannot make informed …

Many security mechanisms are based on specific assumptions of identity and are vulnerable
to attacks when these assumptions are violated. For example, impersonation is the well …

This paper introduces a lightweight, scalable and accurate framework, called Meridian, for
performing node selection based on network location. The framework consists of an overlay …

Any decentralised distributed network is particularly vulnerable to the Sybil attack wherein a
malicious node masquerades as several different nodes, called Sybil nodes, simultaneously …

The LOCKSS project has developed and deployed in a world-wide test a peer-to-peer
system for preserving access to journals and other archival information published on the …