&gt; You have claimed to multiple open source projects that they are not allowed to publish applications on App Stores that use the Signal Protocol&#x27;s four-way signed-plus-one-time-prekey handshake in combination with the Axolotl ratchet, even if they write their own implementation from scratch, because since the only existing original specification of such a protocol is your libsignal, all other implementations are, in your words, &quot;necessarily derived work.&quot;<p>This is an interesting question. My primitive understanding is that as long as there are no patents on the algorithm no one can prevent a clean room design.
Is that right?