Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2007-04-24
2007-04-24
Barron, Gilberto (Department: 2132)
Cryptography
Video cryptography
Video electric signal modification
C380S228000, C713S171000
Reexamination Certificate
active
10425235
ABSTRACT:
A method, apparatus, and article of manufacture provide the ability to securely distribute digital media content from a first entity to a second entity through an intermediate entity. A studio token, comprising information utilized to generate a first key, is generated and distributed to the first entity. A theater token, comprising information utilized to generate a second key, is also generated and then distributed to the second entity. A data file is accepted from the first entity. The data file comprises the media content encrypted according to the first key generated from the studio token, and an authorization header that provides information utilized to generate the second key. The data file is further encrypted according to a third key wherein such further encryption comprises adding a new header to the encrypted media content. The encrypted data file is then distributed to the second entity.
REFERENCES:
patent: 2001/0029579 (2001-10-01), Kusakabe et al.
patent: 2003/0110169 (2003-06-01), Zuili et al.
patent: 2003/0188180 (2003-10-01), Overney
patent: 1154348 (2001-11-01), None
Campanella James C.
Rodriguez Ismael
Barron Gilberto
Gates & Cooper LLP
Perungavoor Venkat
The Boeing Company
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