Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2011-08-09
2011-08-09
Pearson, David J (Department: 2438)
Cryptography
Video cryptography
Copy protection or prevention
Reexamination Certificate
active
07995754
ABSTRACT:
Systems and methods of recording data are disclosed herein. A secure storage area is received from a host device. The secure storage area is indicative of a portion of a memory of the recordable medium to be recorded with encrypted data. A write command is received from the host device. The write command can include at least one data block to be written to the recordable medium and a memory address indicative of a start address where the at least one data block is to be written on the recordable medium. The memory address and the secure storage area can be compared to determine whether the at least one data block falls within the secure storage area. An encryption indicator in the at least one data block can be checked to determine whether the data on the at least one data block is encrypted. If the encryption indicator indicates that the data in the at least one data block is encrypted and if the at least one data block falls within the data range an encryption bit associated with the at least one data block can be set.
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Gabryjelski Henry P.
Jacobson Garrett
Microsoft Corporation
Pearson David J
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