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:
Jun. 08, 2010
Filed:
Feb. 04, 2005
Harumi Morino, Yokohama, JP;
Masataka Okayama, Fujisawa, JP;
Harumi Morino, Yokohama, JP;
Masataka Okayama, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A delivery of content to the unspecified number of persons is prevented by limiting the content delivery range. A delivery source terminalgenerates an authentication code based on the number of possible transmission times of content and an authentication code key, and configures the number of possible transmission times and the generated authentication code in a packet. The delivery source terminaltransmits the packet to a delivery destination terminal. A routerverifies whether the authentication code generated based on the number of possible transmission times and the authentication code keythat are received agrees with the authentication code received from the delivery source terminal, updates the number of possible transmission times when the two codes agree, generates a new authentication code, and configures it in the packet. The routertransmits the packet thus generated to the delivery destination terminal