The authors first explain the notion of secret sharing and also threshold schemes, which can be implemented with the Shamir’s secret sharing. Subsequently, they review social secret sharing and its trust function. In a secret sharing scheme, a secret is shared among a group of players who can later recover the secret. They review the construction of a social secret sharing scheme and its application for resource management in cloud, as explained. To clarify the social secret sharing scheme, they first review its trust function according. In this scheme, a secret is maintained by assigning a trust value to each player based on his behavior, i.e., availability.