Information security – Prevention of unauthorized use of data including prevention...
Reexamination Certificate
2011-08-09
2011-08-09
Zand, Kambiz (Department: 2434)
Information security
Prevention of unauthorized use of data including prevention...
C713S193000
Reexamination Certificate
active
07996907
ABSTRACT:
Data recorded in a recording medium is encrypted with an encryption/decryption key, and the encryption/decryption key is encrypted with an encryption-only key. The encrypted encryption/decryption key is embedded in encrypted data. A decryption-only key the encryption/decryption key is embedded in a program for reading. The data and the program for reading are recorded in the recording medium. The data cannot be read without the program for reading. The program for reading cannot be used for recording other data even if it is copied.
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Kakinuma Kaoru
Matsumoto Kazuki
Dillon & Yudell LLP
International Business Machines - Corporation
Powers William S
Zand Kambiz
LandOfFree
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