Free and open access to encryption and therefore privacy, usually by developing FOSS encryption.

The manifesto is a good and quick read. Steven Levy’s Crypto covers the movement a bit too. It’s a bit strange to use it in this context because there’s not much more to it than PoC or GTFO, communication is key, encryption for everyone. You can’t really replace a more complete paradigm like cyberpunk with cypherpunk. I’d even go so far as to say you can’t combine solar and cypherpunk because cypherpunk is a direct response to the misuse of tech and government whereas solarpunk is about great government tech without the negativity.