I'm bored.

I really want to do something with #Cryptography like #Certificates, etc.

I don't know though. What do people do with this? I want to make something that works everywhere as an experiment that may end up being fully used.

Making my own certs require having a trusted #CARoot which not every system will have. Could do that but I don't see a point really.

Not sure right now, any ideas from the audience?