I believe you can work around the encryption ban. eg, for the UK; “ 11(2) The Licensee shall only address Messages to other Amateurs or to the stations of thos

I believe you can work around the encryption ban. eg, for the UK; “ 11(2) The Licensee shall only address Messages to other Amateurs or to the stations of those Amateurs and shall not encrypt these Messages for the purpose of rendering the Message unintelligible to other radio spectrum users.” You can sign a message to authenticate it, without making it unintelligible. (compare pgp signing, snmp AuthNoPriv, etc)