online Social Network (OSN) is a network, where an individual can communicate with each other through their mobile phones or any social networking sites such as Facebook, twitter etc. The trust is useful in the online social network to enable the users to exchange their information securely. In OSN, the information might be misused by propagating wrong news virally through photos, videos, and audios. A user in social network may collect personal information of others and can launch different attacks. Hence it could draw the researchers focus in proposing trust related methods to provide secure environment in social network. In trust management, each user is observed and rated based on his activities. So that only trustworthy users sare only allowed to share to the activities. In this paper, the trust is defined in terms of social network terminology. Different trust computational methods are discussed in social network. All the recent methods are compared by studying their advantages and disadvantages.

Social Networks

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