On August 30, 1996,Johan Helsingius shut down anon.penet.fi. At its peak, the server had processed messages for over 700,000 users. It had given whistleblowers, abuse survivors, and political dissidents a way to communicate without attaching their names. It was the most widely used anonymity service on the internet. It had no encryption. It was a database. It mapped real email addresses to pseudonyms, stripped headers, and re-sent. Helsingius shut it down not because it was hacked, not because..