BD+

BD+ is a component of the Blu-ray digital rights management system designed to prevent unauthorized copying or playback of Blu-ray discs.

BD+ was developed by Cryptography Research Inc. (CRI) and is based on their Self-Protecting Digital Content (SPDC) concept. BD+ was adopted by the Blu-ray Disc Association for protecting Blu-ray discs.

While BD+ has not stemmed the flow of "cracked" high-definition content, it has made it necessary for those who wish to copy Blu-ray movies to reinvest resources to break each new version of security code.

BD+ played a pivotal role in the format war of Blu-ray and HD DVD. Several studios cited Blu-ray Disc's adoption of the BD+ anti-copying system as the reason they supported Blu-ray Disc over HD DVD. The copy protection scheme was to take "10 years" to crack, according to Richard Doherty, an analyst with Envisioneering Group.

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