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We present coding methods for protecting against tampering of write-once optical disks which turns them into a secure digital medium for applications where critical information must be stored in a way that prevents or allows detection of an attempt at falsification. Our method involves adding a small amount of redundancy to a modulated sector of data. This extra redundancy is not used for normal operation, but can be used for determining, say as a testimony in court, that a disk has not been tampered with.
By: Mario Blaum, Kurt Rubin, Wilfried Lenth and Jehoshua Bruck (CA Inst. of Technology)
Published in: IEEE Transactions on Computers, volume 47, (no 1), pages 120-5 in 1998
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