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ROM Mark

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Source updated February 2, 2026

In computing, ROM Mark or BD-ROM Mark is a serialization technology designed to guard against mass production piracy or the mass duplication and sale of unauthorized copies of pre-recorded Blu-ray Discs. Only licensed BD-ROM manufacturers have access to the equipment that can make these unique ROM Marks, thus allowing authentic BD-ROM media like movies and music to be identified.

The ROM Mark contains the Volume ID required to decrypt content encrypted using AACS.

Watch videos about ROM MarkExplainers and documentaries on YouTube (opens in a new tab)

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