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:
Jul. 02, 2013
Filed:
Mar. 07, 2011
Shuzhou Liu, Toronto, CA;
Michael A. Varley, Toronto, CA;
Shuzhou Liu, Toronto, CA;
Michael A. Varley, Toronto, CA;
Symantec Corporation, Mountain View, CA (US);
Abstract
A method and system for detecting captive portals includes a two phase captive portal detection process whereby an initial HTTP ping request is sent from the endpoint captive portal detection application on an end user computing system to an Internet accessible web server. The Internet accessible web server is expected to return an initial response token to the endpoint captive portal detection application in response to the initial HTTP ping request and if the expected initial response token is received, an initial HTTPS query request is then sent together with the returned initial response token that requires server/client mutual authentication. If mutual authentication is accomplished, then it is determined that the user is not in a captive portal. Follow up HTTP ping requests are then periodically generated by the endpoint captive portal detection application and if the responses to the follow up HTTP ping requests do not change, i.e., the token does not change, no new HTTPS query request is sent.