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:
Jan. 29, 2013
Filed:
Jan. 16, 2009
Daniel G. Wing, San Jose, CA (US);
David A. Mcgrew, Poolesville, MD (US);
Cullen F. Jennings, Santa Cruz, CA (US);
Eric G. Vyncke, Aleur, BE;
Daniel G. Wing, San Jose, CA (US);
David A. McGrew, Poolesville, MD (US);
Cullen F. Jennings, Santa Cruz, CA (US);
Eric G. Vyncke, Aleur, BE;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques are described for the use of a cryptographic token to authorize a firewall to open a pinhole which permits certain network traffic to traverse firewalls. An initiating endpoint requests a token from a call controller, which authorizes a pinhole though the firewall. In response, the call controller may generate a cryptographic authorization token (CAT) sent towards the destination endpoint. The call controller may generate the token based on an authorization ID associated with the call controller, a shared secret known to both the call controller and the firewall, and data specific to the media flow for which authorization is requested.