Cryptography – Key management – Having particular key generator
Patent
1998-02-06
2000-11-07
Trammell, James P.
Cryptography
Key management
Having particular key generator
705 1, 705 18, 705 44, 705405, 380 42, G06F 1760, H04L 900
Patent
active
061447439
ABSTRACT:
In the invention, an information recording medium records encrypted information, encrypted key information obtained by encrypting key information for decrypting the encrypted information to obtain original information, and non-encrypted condition information used upon decrypting the encrypted information and recorded in the encrypted key information, and the encrypted information from the information recording medium is decrypted inside an IC card using the encrypted key information and condition information. Upon decrypting the encrypted information from the information recording medium, information that requires security protection or copyright protection can be prevented from being illicitly copied.
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Ando Hideo
Yamada Hisashi
Kabushiki Kaisha Toshiba
Nguyen Cuong H.
Trammell James P.
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