Verifying the presence of an original data storage medium

Details Verifying the presence of an original data storage medium Verifying the presence of an original data storage medium

2008-01-29

2008-01-29

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Computer program modification detection by cryptography

C713S153000, C713S176000, C726S026000, C709S206000, C380S201000, C380S206000

Reexamination Certificate

active

07325145

ABSTRACT:
A verification system randomly retrieves data from a removable data storage medium. The retrieved data is compared to corresponding verification data, which is known to be valid. The system determines that a legitimate removable data storage medium is present if the retrieved data matches the corresponding verification data. The removable data storage medium can be partitioned into multiple blocks of data. A cryptographic digest is calculated for each data block. The digests are compared to determine whether the retrieved data matches the verification data. The removable data storage medium may be a compact disc (CD) or a digital versatile disc (DVD).

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