Abstract: The present invention relates to a system and a method for managing identities. A system is described for managing individual identities of persons or other entities interacting on a network of clients and servers, where the system comprises one or more identity servers or sites, with the identity servers or sites storing a number of identities, each identity representing identity information data of an individual person or entity, each identity having at least part of said information data being structured as a number of sets of data with at least part of said sets of data having one or more corresponding access rules selected from a plurality of different access rules. Here, the access rules of a given identity may be enforced by the identity server or site storing said given identity or by a server communicating with said identity server or site.