Information security – Prevention of unauthorized use of data including prevention... – Limitations on number or amount of copies
Reexamination Certificate
2007-12-18
2007-12-18
Moazzami, Nasser (Department: 2136)
Information security
Prevention of unauthorized use of data including prevention...
Limitations on number or amount of copies
C713S193000, C380S201000, C380S255000
Reexamination Certificate
active
10133604
ABSTRACT:
A digital information recording apparatus includes multiple recording circuits for making multiple copies. The apparatus limits the number of copies, however, in accordance with copy information provided within the digital information itself. When the number of copies is reached, if additional copies are to be made, then the source copy is disabled when a new copy is made.
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J.P.M.G. Linnartz, The “Ticket” Concept for Copy Control Based on Embedded Signalling, Lecture Notes in Computer Science, vol. 1485, Jan. 1998, pp. 257-274.
Okamoto Hiroo
Owashi Hitoaki
Yoshioka Atsushi
Cervetti David Garcia
Hitachi , Ltd.
Moazzami Nasser
Townsend and Townsend / and Crew LLP
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