LaserLock
Encyclopedia
LaserLock is a CD-ROM
CD-ROM
A CD-ROM is a pre-pressed compact disc that contains data accessible to, but not writable by, a computer for data storage and music playback. The 1985 “Yellow Book” standard developed by Sony and Philips adapted the format to hold any form of binary data....

 copy restriction technique. It works by including a hidden directory on the CD which contains corrupted
Data corruption
Data corruption refers to errors in computer data that occur during writing, reading, storage, transmission, or processing, which introduce unintended changes to the original data...

data. When the disk is copied, the read device encounters errors due to the hidden directory.
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