Patent ID: 8635666

Claim:
A network-hosted method for providing an anti-phishing content security service for users of the network, comprising: (i) storing a plurality of legitimate network addresses with associated data indicative of content that users associate with each of the stored plurality of legitimate network addresses; (ii) analyzing network-borne traffic for data that appears related to the associated data; (iii) in the event that the network-borne traffic data analyzed in step (ii) is related to the associated data, preventing user access to any network address that is the source or intended recipient of said network-borne traffic data where said network address is not a stored legitimate network address for the associated data; (iv) adding network addresses, to which user access is prevented at step (iii), to store of prohibited network addresses for use by a present security service of by other security services; and wherein step (ii) comprises a lexical analysis of traffic data content using a heuristic algorithm having one or more rules for the comparison of said content with the stored associated data, the method further comprises the step: (v) adjusting said one or more rules for use by the presented security service or by further security services in dependence upon the results of step (iii).