Patent ID: 8875250

Claim:
A method for authenticating an end user, said method implemented through use of a computer processor, said method comprising: said processor receiving a selected subset of root nodes of a set of root nodes in a server mask, said selected subset of root nodes having been selected by the end user; and in response to said receiving the selected subset of root nodes, said processor authenticating the end user by determining that the spatial location in the server mask of each root node of the selected subset of root nodes matches a spatial position of a corresponding root node of a server set of transparent root nodes in the server mask, wherein the server set of transparent root nodes are a result of a first random selection of root nodes from the set of root nodes in the server mask, wherein the set of root nodes in the server mask consists of the server set of transparent root nodes and a server set of opaque root nodes, and wherein the server mask comprises a set of nodes, wherein each node of the set of nodes in the server mask is in a unique spatial location in the server mask, wherein the set of nodes comprises the set of root nodes.