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:
Apr. 28, 2015
Filed:
Mar. 26, 2014
Sonicwall, Inc., San Jose, CA (US);
Jonathan J. Oliver, San Carlos, CA (US);
Brian K. Wilson, Palo Alto, CA (US);
Damon K. Uyeda, San Francisco, CA (US);
Scott D. Eikenberry, Menlo Park, CA (US);
David A. Koblas, Los Altos, CA (US);
Tim Nufire, San Francisco, CA (US);
SonicWALL, Inc., Santa Clara, CA (US);
Abstract
A system and method are disclosed for registering a email sender for the purpose of sending an email message to an email receiver including receiving a challenge message wherein the challenge message includes a machine answerable question; processing the challenge message to determine that it is a challenge message sent for the purpose of authorizing delivery of the email message; analyzing the question to determine a valid response to the challenge message; and sending the valid response that includes the answer wherein a nontrivial amount of resources are required to send the valid response.