For those who don't know, Trevor Perrin is an applied crypto legend. Before writing this, he helped design the Axolotl protocol that powers Signal and WhatsApp.
Axolotl was recently renamed to "Signal Protocol". At the time I thought that was lame because it's used in other products as well and because the name sounds generic.
I guess they made it a pun, because now we have a Noise Protocol Framework from the same ppl.