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:
Jul. 15, 2003
Filed:
Jun. 02, 1999
Tamio Okui, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A Ca server generates and encrypts a work key (Kw) and delivers the key to receiving terminals. The CA server further updates scramble key (Ks) at a predetermined interval and delivers the key to the terminals. A contents server encrypts service contents using the Kw and the Ks to deliver the contents toward an IP address for the group. A delivering router receives the contents and delivers the content to the receiving terminals based on the IP address. The receiving terminals, when receives the encrypted contents, decode the contents using the Kw and the Ks and replace the IP address with its own IP address.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile