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Unfortunately, there are cases in which courts said approximately that implementing an algorithm (especially an algorithm that is a secret¹) without permission can be a violation of §1201. Recall (a)(3)(A) to “circumvent a technological measure” means to descramble a scrambled work, to decrypt an encrypted work, or otherwise to avoid, bypass, remove, deactivate, or impair a technological measure, without the authority of the copyright owner; and
(B) a technological measure “effectively controls access to a work” if the measure, in the ordinary course of its operation, requires the application of information, or a process or a treatment, with the authority of the copyright owner, to gain access to the work.
¹ yes, I know that it's weird to regard the algorithm as a secret when implementations are given out to the user[edited in response to correction by wtallis] |
Phil Zimmermann asked this question in the context of export controls on "cryptography technology", i.e. the PGP software. MIT Press published the source code in 1995. But the US dropped its objections and this wasn't specifically tested in court (AFAIK, though similar questions were).
https://en.wikipedia.org/wiki/Pretty_Good_Privacy#Criminal_i...