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. 24, 2009
Filed:
Feb. 25, 2003
Patrice Y. Simard, Bellevue, WA (US);
Richard Stephen Szeliski, Bellevue, WA (US);
Josh Benaloh, Redmond, WA (US);
Iulian D. Calinov, Redmond, WA (US);
Julien D. Couvreur, Kirkland, WA (US);
Patrice Y. Simard, Bellevue, WA (US);
Richard Stephen Szeliski, Bellevue, WA (US);
Josh Benaloh, Redmond, WA (US);
Iulian D. Calinov, Redmond, WA (US);
Julien D. Couvreur, Kirkland, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Methods for preventing unauthorized scripting. The invention generates a human interactive proof to distinguish a human from a machine by generating a random set of characters and altering each of the characters individually to inhibit computerized character recognition. The invention also includes concatenating the altered characters into a character string to be rendered to a user as a test. The character string may be altered to further inhibit computerized character recognition. Other aspects of the invention are directed to computer-readable media for use with the methods.