Abstract
The open and anonymous nature of peer-to-peer (P2P) networks creates almost ideal environment for malicious activities. The trust management (TM) allows to establish trust relationships between peers in such hostile environment and makes using the P2P network more secure.
In this paper we present a novel trust management system called BubbleTrust which use some new approaches. The system creates a bubble around the unknown peers which includes all peers which trust them.
Each peer is evaluated separately as a participant in network services and as a participant in the TM. The peer credibility is derived only from verified information about transactions between peers.
Our aim was to create a system which is applicable in large P2P networks and provides the reliable results.