Authentication system

Abstract

A system and method whereby the identity of a person, entity, device or the like attempting to gain access to a secured resource may be securely authenticated includes a means for receiving from a requester purporting to be an authorized user of a secured resource a request for access to the secured resource; means for generating and communicating to the purported authorized user a challenge string adapted to provide a basis for authenticating the identity of the requester; a means for receiving a response string corresponding to the challenge string; and a means for evaluating the response string to authenticate the identity of the requester.

What is claimed is: 
     
         1 . An authentication system for authenticating the identity of a requester of access to a secured resource, said authentication system comprising:
 means for receiving from a requester purporting to be an authorized user of a secured resource a request for access to said secured resource;   means for generating a challenge string, said challenge string being adapted to provide a basis for authenticating the identity of said requester;   means for communicating said challenge string to said authorized user that said requester purports to be;   means for receiving a response string corresponding to said challenge string; and   means for evaluating said response string to authenticate the identity of said requester.   
     
     
         2 . The authentication system as recited in  claim 1 , wherein said means for evaluating said response string further comprises means for invalidating said response string based upon passage of time. 
     
     
         3 . The authentication system as recited in  claim 1 , said authentication system further comprising means for establishing a test adapted to detect the existence of a spoofing type deception. 
     
     
         4 . The authentication system as recited in  claim 3 , wherein said test adapted to detect the existence of a spoofing type deception is further adapted to at least in part authenticate the identity of said requester.