Prolok
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Prolok was a copy protection system developed by W. Krag Brotby and Vault Corporation in 1982. Prolok was involved in the copyright law case Vault Corp. v. Quaid Software Ltd. which allowed software to be used in certain situations that the copyright holder did not originally intend.
Prolok was developed for Apple II, CP/M, CP/M-86, MS-DOS, Microsoft Windows and OS/2. The company obtained US Patent 4,785,361, which listed Brotby as the technology's inventor.[1]
References[edit]
- ^ US patent 4785361, W. Krag Brotby, "method and apparatus for frustrating the unauthorized copying of recorded data", issued November 15, 1988
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