Apparatus and method for reproducing user data

Details Apparatus and method for reproducing user data Apparatus and method for reproducing user data

2007-02-13

2007-02-13

Barrón, Gilberto (Department: 2131)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S171000, C713S155000, C380S277000, C380S278000, C380S279000, C726S026000

Reexamination Certificate

active

10196300

ABSTRACT:
In an apparatus and a method for reproducing user data stored in encrypted form on a recording medium, in order to provide a higher level of protection against hacking of user data and, in particular, of decryption keys, which are used for encrypting said user data and which are also stored on the recording medium, an integrated unit calculates a decryption key using key data read from the recording medium, decrypts the user data read from said recording medium using the calculated decryption key, andre-encrypts the decrypted data using a re-encryption key. The re-encrypted data and the re-encryption key are then transmitted to an application unit for decrypting the re-encrypted data using the re-encryption key and for reproducing the decrypted data.

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