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:
Aug. 07, 2012
Filed:
Sep. 12, 2007
Tuomas Aura, Cambridge, GB;
Michael Roe, Cambridge, GB;
Steven Murdoch, Cambridge, GB;
Microsoft Corporation, Redmond, WA (US);
Abstract
Dynamic host configuration protocol (DHCP) is extended in order to assist with secure network location awareness. In an embodiment a DHCP client receives a signed DHCP response message from a DHCP server, the signed message comprising at least a certificate chain having a public key. In that embodiment the DHCP client validates the certificate chain and verifies the signature of the signed message. If this is successful the DHCP client accesses stored settings for use with the server. The stored settings are accessed at least using information about the public key. In some embodiments signed DHCPOFFER messages and signed DHCPACK messages are used. In another embodiment the signed DHCP message comprises a location identifier which is, for example, a domain name system (DNS) suffix of a DHCP server.