The First Major Public Release of Tor

This article explores the history and milestone dates surrounding the initial launch of Tor (The Onion Router). While the concept of onion routing originated within the United States military in the 1990s, the first major public release of the software occurred on September 20, 2002. Below is a direct breakdown of how this release happened, who built it, and how it evolved into the globally recognized privacy network used today.

The Origins of Onion Routing

In the mid-1990s, mathematician Paul Syverson and computer scientists Michael G. Reed and David Goldschlag developed onion routing at the United States Naval Research Laboratory (NRL). The purpose was to create a secure communications network for U.S. intelligence operations, concealing both the user’s location and their usage patterns.

The September 2002 Alpha Release

In 2002, computer scientists Roger Dingledine and Nick Mathewson joined Paul Syverson to design a next-generation onion routing system. Unlike its predecessor, this implementation was designed to run on a decentralized network operated by volunteers.

On September 20, 2002, Dingledine and Mathewson deployed the first public alpha version of the software, officially naming the implementation “Tor” (short for “The Onion Router”). This release made the software accessible beyond the lab for testing and early network deployment.

The Open-Source Milestone and Public Deployment

The deployment expanded rapidly over the next two years:

The September 20, 2002 alpha launch remains the defining initial public release that transformed onion routing from a military research concept into the decentralized, global anonymity network used today.