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:
Dec. 17, 2002
Filed:
Jun. 30, 1998
Applicant:
Inventors:
Assignee:
Microsoft Corporation, Redmond, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 ; H04K 1/00 ;
U.S. Cl.
CPC ...
H04L 9/00 ; H04K 1/00 ;
Abstract
A system controls access to broadcast messages received by a plurality of mobile devices. Selected mobile devices are provided with a broadcast encryption key (BEK). The broadcast messages are encrypted using the BEK prior to broadcasting so that the selected mobile devices containing the BEK can decrypt the broadcast messages. The broadcast messages are then broadcast.