The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2006
Filed:
Jul. 26, 2000
Daniel Bleichenbacher, Sumit, NJ (US);
Bjorn M. Jakobsson, Hoboken, NJ (US);
Daniel Bleichenbacher, Sumit, NJ (US);
Bjorn M. Jakobsson, Hoboken, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A system for, and method of, controlling access to a resource of a computer system. In one embodiment, the system includes: (1) a database of problems and corresponding precalculated solutions, (2) a problem retriever that responds to a request from a client for access to the resource by retrieving one of the problems from the database and transmitting the one of the problems to the client and (3) a solution evaluator that, upon receiving a putative solution from the client, employs the database to validate the putative solution and, if the putative solution is valid, grants the client access to the resource.