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. 07, 2009
Filed:
May. 29, 2001
Michael G. Lee, Ottawa, CA;
Leslie D. Owens, Vienna, VA (US);
Michael G. Lee, Ottawa, CA;
Leslie D. Owens, Vienna, VA (US);
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
A technique for enabling a firewall device to allow encrypted data to securely pass between networks, and at the same time allow the firewall to selectively monitor the encrypted traffic that is allowed to pass is disclosed. In one embodiment, the technique is realized by detecting an exchange of a first encryption key between a host device and a remote device, and the first encryption key supports confidentiality protection of a first security policy between the host device and the remote device. Next, a second encryption key is exchanged with the host device when the exchange of the first encryption key is detected, and the exchange of the second encryption key supports confidentiality protection of a second security policy between the firewall and the host device. Next, based at least in part upon the second security policy, the first encryption key is requested and the first encryption key is sent under the protection of the second security key and in accordance with the second security policy. Finally, encrypted data is passed when it is determined that the first encryption key is received.