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FCC regulations say: "No amateur station shall transmit: [...] messages encoded for the purpose of obscuring their meaning". https://www.law.cornell.edu/cfr/te

FCC regulations say: "No amateur station shall transmit: [...] messages encoded for the purpose of obscuring their meaning". https://www.law.cornell.edu/cfr/text/47/97.113 https://www.law.cornell.edu/cfr/text/47/97.113 This isn't entirely unambiguous, and people can and do argue about how it applies to things like proprietary data protocols that aren't publicly documented. But I think it's clear that encryption, such as that used by HTTPS, is intended to be banned by this clause.

zikduruqe 4y ago
But you can obscure command and control signals to space based stations. You don't want people knowing how to reprogram or turn off your satellite. 47 CFR § 97.211 - Space telecommand station. (b) A telecommand station may transmit special codes intended to obscure the meaning of telecommand messages to the station in space operation.