Some embodiments are directed to managing transactions in a computer system, which receives information indicating a first node has at least one right with regard to a second node such that the first node is associated with the second node. An identity network is created, based, on the association between the first node and the second node, representing undirected ties between a plurality of nodes, the plurality of nodes including at least the first and second node. Using the identity network, a rights network is created representing directed ties between the plurality of nodes based, at least in part, on the undirected ties of the identity network and the at least one right the first node has with regard to the second node. The rights network is used to determine whether a transaction initiated by the first node is permissible based, at least in part, on the rights network.
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