  This paper presents a review of peer-to-peer network security. Popular for
sharing of multimedia files, these networks carry risks and vulnerabilities
relating to data integrity, spyware, adware, and unwanted files. Further
attacks include those of forgery, pollution, repudiation, membership and
Eclipse attacks, neighbor selection attacks, Sybil, DoS, and omission attacks.
We review some protection mechanisms that have been devised.
