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A comment on Hacking Ham Radio for Texting. Parent comment

Re:Hacking Ham Radio for Texting by fragmede on Wednesday November 17, 2021 @02:52PM (#29258059)
But even not-for-business, I don't want someone else to be able to impersonate others, so signatures/verification still needs to be supported. Otherwise someone who's good at voice impersonations of others could wreak havok.
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Re:Hacking Ham Radio for Texting by tjohns on Wednesday November 17, 2021 @02:59PM (#29258147)
There is no rule against using digital signatures for authentication. Your actual message just has to be in the clear.

The exact wording is in 97.113: "No amateur station shall transmit... messages encoded for the purpose of obscuring their meaning".

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