Cryptography – Key management
Reexamination Certificate
2007-04-24
2007-04-24
Barrón, Jr., Gilberto (Department: 2136)
Cryptography
Key management
C713S171000, C380S228000
Reexamination Certificate
active
10140504
ABSTRACT:
The invention relates to a method for decrypting encrypted data stored on a record carrier, to a corresponding method for encrypting data and to corresponding apparatuses. In order to provide a high level of protection for data stored on a record carrier and to prevent that data stored on different record carriers can be decrypted after a decryption algorithm has become known the method for decrypting encrypted data according to the invention comprises the following steps:a) generating a decryption key (DK) using a unique carrier identifier (UDI) associated with said record carrier, a hidden key (HK) stored in a hidden channel on said record carrier and a password key (PK), andb) decrypting said encrypted data stored on said record carrier using said generated decryption key (DK).
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Barrón Jr. Gilberto
Belk Michael E.
Koninklijke Philips Electronics , N.V.
Yalew Fikremariam
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