The Internet has changed from a statically, television-like web page space to a highly heterogeneous and extremely dynamic information platform. No other technology forced that development like Peer-to-Peer. This short paper will briefly summarize emerging trends and promising concepts for Peer-to-Peer systems and describe upcoming challenges for developers.

There is an increasing interest in using Peer-to-Peer (P2P) architectures as a basis for software systems. However, by their very nature, achieving dependability within a P2P system can be difficult. This paper provides an initial analysis of the main issues that need to be considered when developing a dependable P2P system. It examines the key properties that can influence the dependability of...

The information flow inside a P2P network is highly dependent on the network structure. In order to ease the diffusion of relevant data toward interested peers, many P2P protocols gather similar nodes by putting them in direct contact. With this approach the similarity between nodes is computed in a pointto-point fashion: each peer individually identifies the nodes that share similar interests ...

1. ABSTRACT Peer-to-peer systems have been enjoying increasing popularity due to claims of being able to harness huge amounts of storage without the drawback of having to trust and rely on a central point of control. These systems create various issues that are not easy to solve. At this time, existing peer-to-peer systems offer solutions for some of the issues. I am engaged in exploring differ...

The assumptions on which peer-to-peer computing has grown are wildly different than those underlying Grid computing. Peer-to-peer systems have evolved to support resource sharing in an environment characterised by users potentially numbering millions, most with homogenous desktop systems and low bandwidth, intermittent connections to the Internet. As such, the emphasis has been on global fault-...

Basic P2P routing algorithms require log(n) hops to route a message in a geographically distributed network. High latency of basic P2P routes is often unacceptable for delay-sensitive applications such as interactive browsing. Additional routing information at a node could help to reduce the latency at an expense of larger routing tables. We propose cyclic routing as a new approach to balance t...

Until now, the analysis of fault tolerance of peerto-peer systems usually only covers random faults of some kind. Contrary to traditional algorithmic research, faults as well as joins and leaves occurring in a worst-case manner are hardly considered. In this paper, we devise techniques to build dynamic peer-to-peer systems which remain fully functional in spite of an adversary which continuousl...

Shared ride systems match the travel demand of transport clients with the supply by vehicles, or hosts, such that the clients find rides to their destinations. A peer-to-peer shared ride system allows clients to find rides in an ad-hoc manner, by negotiating directly with nearby hosts via radio-based communication. Such a peer-to-peer shared ride system has to deal with various types of hosts, ...