Say you wanted to create a new filesharing protocol and associated software that must fulfill three criteria:

1. Distributed, with no central server
2. Encrypted
3. Completely anonymous

How could you fulfill these design goals?

There are a few interesting, related ideas to keep in mind:

• Tor, an anonymous routing network
• Mobile ad-hoc networking
• Git, a distributed version control system
• Friend-to-friend networks
• XML, for the protocol packets

What else?