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:
Mar. 05, 2019
Filed:
Jun. 20, 2016
Apple Inc., Cupertino, CA (US);
David A. den Boer, San Martin, CA (US);
Shahid Ahmed, Los Altos Hills, CA (US);
Jennifer A. Walton, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Techniques are disclosed for implementing a CAPTCHA access control system based on graphical representations of a watch or other timekeeping device. More particularly, the disclosed CAPTCHA system's request/challenge mechanism employs a graphical representation of a watch whose perturbation from a baseline visual presentation is controlled by a large number of attributes, each of which may assume a number of different values. The use of a large number of display attributes (e.g., 20 or more) and a relatively small number of difficulty levels allows each difficulty level to have an enormous number of possible graphical representation. Such a large number of potential challenge images essentially precludes the likelihood that any automated search for a matching image—providing the ability to correctly respond with certainty to the challenge query—will be successful.