Here in the US, I think we seriously need to capitalize on the 2A crowd. Encryption is a purely defensive weapon, like a shield. It can't actively damage or harm anyone else, but it is a critical means of protection in the modern world. We need the 2A people to understand that it both protects the privacy and security of our digital homes and lives, as well as serving as a check on the power of abusive governments, which are both of the purposes that traditional weapons under the 2A protect.