Patent · US Active

Using authentication tokens to authorize a firewall to open a pinhole

US8363836B2 · kind B2 · utility

0Cited by

10References

20Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Daniel G. Wing · San Jose, US
David McGrew · Poolesville, US
Cullen Jennings · San Jose, US
Eric Vyncke · Blegny, BE

Key dates

Filing date	Jan 16, 2009
Grant date	Jan 29, 2013
Priority date	—
Expiry date	Feb 27, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04M7/0078
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.