Study on Security Problems of Peer—to—peer Systems

Recent peer—to—peer research has focused on providing efficient lookup systems.These systems have good properties when their al-gorithms are executed correctly but have not generally considered how to handle misbehaving nodas.This paper focuses on the remaining attacks thatthreaten the security of the system,by preventing participants from finding data.This paper defines a security token security model for addressing se-curity within peer—to—peer systems environment.