I think GPL3 is a fine license for the project. Affero GPL would be even better. Communication is fundamental to what humans do, and if you want secure communi

I think GPL3 is a fine license for the project. Affero GPL would be even better. Communication is fundamental to what humans do, and if you want secure communications, the USER needs access to the source for auditing purposes. The GPL gives that freedom & protection to the user. BSD et al. only gives freedom to developers, and when building a platform that purports to be secure, the code must be visible to everyone that uses it. That's what the GPL provides.