<story><title>M17 Aims to Replace Proprietary Ham Radio Protocols</title><url>https://hackaday.com/2020/10/02/m17-aims-to-replace-proprietary-ham-radio-protocols/</url></story><parent_chain><item><author>MaxBarraclough</author><text>Is it legal to use crypto with ham transmissions? I was the under the impression that was generally forbidden.</text></item></parent_chain><comment><author>nateberkopec</author><text>Section 97.113(a)(4) of the Amateur Service rules prohibits the transmission of “effectively encrypted or encoded messages, including messages that cannot be readily decoded over-the-air for true meaning.”&lt;p&gt;What _exactly_ that means is, of course, up for debate. Some say you can use encryption as long as the key is publicly available and obvious (i.e. my key is &amp;quot;password&amp;quot;). There&amp;#x27;s been a bunch of stuff happening in the last year around Winlink. Devil&amp;#x27;s in the details.</text></comment>
<story><title>M17 Aims to Replace Proprietary Ham Radio Protocols</title><url>https://hackaday.com/2020/10/02/m17-aims-to-replace-proprietary-ham-radio-protocols/</url></story><parent_chain><item><author>MaxBarraclough</author><text>Is it legal to use crypto with ham transmissions? I was the under the impression that was generally forbidden.</text></item></parent_chain><comment><author>wl</author><text>There are exceptions that allow for use of encryption to authenticate remote control of satellites and such. But generally speaking, it violates the rules to obscure the content of a message.</text></comment>