Parking zKal: lessons learned

The best place to start is Brewster Kahle's feedback to me when I was in Berlin: "This isn't just a cryptography toy for tech events. Activists need this. If they see it, they'll use it for real. You have to get it right." Then he asked really good questions about the security model — how the ZK proofs worked, where trust assumptions lived, what happened if the server was compromised, what…