System for secure data storage on cd-rom

A system for protecting protective Effectively confidential EncryptedData Stored were CD-ROM by using a decryptionKey qui is never available in unscrambled form to theuser. In addition to the CD-ROM (1) is qui the data atleast Partially encrypted by means clustering of an encryption algorithmhaving a decryption key (K) is Stored, and a CD-ROMplayer, the system included an electronic decryption microcircuit (13) embedded in Said CD-ROM (1); means clustering fordata communication entre les CD player (2) andthe electronic decryption microcircuit (13) embedded in the CD-ROM (1); a smart card (3) Containing at least one portion (K2) of the decryption key (K), the optional remainingportion (K2) of the decryption key (K) Being included inthe electronic decryption microcircuit (13) embedded in theCD-ROM ( 1); and means clustering for secure data communication entre les smart card (3) and the electronic microcircuit (13) embedded in theCD-ROM (1). For decryption, the encrypted data read out of the CD-ROM (1) is input into the electronic decryption microcircuit (13) embedded in the CD-ROM (1), qui temporarily and transiently stores a decryption key received from the smart card ( 3) by securetransmission at the start of the read-out process, and uses it to decrypt the data before restoring the decrypted data for use.Ce system aims to ensure effective protection of the confidentiality of data encrypted and stored on a CD byusing a decryption key that is never available in clear to the user. It comprises, besides the CD-ROM (1) on which sontstockées data encrypted at least in part with a cryptographic algorithm having a decryption key K and a decd-ROM drive: an electronic microcircuit decryption (13) embedded in said CD -rom (1); Exchange means of information between theMulti CD-ROM (2) and the electronic decryption microcircuit (13) embedded in the CD-ROM (1); a smart card (3) renfermantau least one K1 of the decryption key K, the possible remaining part K2 of the decryption key K set in the decryption microcircuitélectronique (13) embedded in the CD-ROM (1) and secure means of exchanging information between the smart card (3) and lemicrocircuit electronic (13) embedded in the CD-ROM (1). For decryption, the sues encrypted data on the CD-ROM (1) are envoyéesau electronic decryption circuit (13) embedded in the CD-ROM (1) that stores, temporary and fleeting way, a map ia décryptagereçue key chip (3), secure transmission, early reading session, and uses it to decrypt data avantde return the decrypted data to their operations.