  Most of the peers accessing the services are under the assumption that the
service accessed in a P2P network is utmost secured. By means of prevailing
hard security mechanisms, security goals like authentication, authorization,
privacy, non repudiation of services and other hard security issues are
resolved. But these mechanisms fail to provide soft security. An exhaustive
survey of existing trust and reputation models in P2P network regarding service
provisioning is presented and challenges are listed.p2p Trust issues like trust
bootstrapping, trust evidence procurement, trust assessment, trust interaction
outcome evaluation and other trust based classification of peers behaviour into
trusted, inconsistent, un trusted, malicious, betraying, redemptive are
discussed.
