Copy protection systems

Copy protection, also known as content protection, copy prevention and copy restriction, describes measures to enforce copyright by preventing the reproduction of software, films, music, and other media. This page shows copy protection systems used by various duplicators over the years.

Copy protection systems

• Stop Copy
• Analog Protection System (developed by Macrovision Corporation)

See also

• Bell & Howell test patterns
• Cross-duplicating tapes
• Duplicators
• Technicolor DTMF sequences