Content transmission control device, content distribution...

Details Content transmission control device, content distribution... Content transmission control device, content distribution...

2005-02-04

2010-06-08

Simitoski, Michael J (Department: 2439)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Packet header designating cryptographically protected data

C713S160000, C726S030000

Reexamination Certificate

active

07734913

ABSTRACT:
A delivery of content to the unspecified number of persons is prevented by limiting the content delivery range. A delivery source terminal110generates an authentication code based on the number of possible transmission times of content and an authentication code key116, and configures the number of possible transmission times and the generated authentication code in a packet. The delivery source terminal110transmits the packet to a delivery destination terminal130. A router120verifies whether the authentication code generated based on the number of possible transmission times and the authentication code key124that are received agrees with the authentication code received from the delivery source terminal110, updates the number of possible transmission times when the two codes agree, generates a new authentication code, and configures it in the packet. The router120transmits the packet thus generated to the delivery destination terminal130.

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Hitachi, Ltd., et al., “DTCP vol. 1, Supplement E Mapping DTCP to IP (Informational Version)”, Draft Revision 0.9, Sep. 12, 2003, 1997-2003, 19 pages.

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