  Given a cloud-based anonymous data storage system, there are two ways for
managing the nodes involved in file transfers. One of them is using reputations
and the other uses a micropayment system. In reputation-based approach, each
node has a reputation associated with it, which is used as a currency or
feedback collection for file exchange operations. There have been several
attempts over the years to develop a strong and efficient reputation system
that provides credibility, fairness, and accountability. One such attempt was
the Free Haven Project that provides a strong foundation for cloud-based
anonymous data storage systems. The work proposed in this paper is motivated by
the Free Haven Project aimed at developing a reputation system that facilitates
dynamic operations such as adding servers, removing servers and changing role
of authorities. The proposed system also provides algorithm for scoring and
maintaining reputations of the servers in order to achieve credibility,
accountability and fairness.
