Yes, a Tor developer did assist the FBI in an investigation that involved attacking Tor users, but the details matter. In 2007, a computer science graduate student and Tor developer named Matthew Edman was approached by the FBI and agreed to help them identify users of a specific website, not to break Tor’s anonymity for everyone. This article explains exactly what happened, what he did, and what it means for Tor users today.
Background: The 2007 Case and Matthew Edman
The story begins with a federal investigation into a child pornography website that was hidden on the Tor network. The FBI needed to identify the people running and using the site, and they turned to a Tor developer named Matthew Edman. Edman, who had contributed to the Tor project as a graduate student, agreed to help the FBI. His assistance was not about breaking Tor’s core encryption or revealing all users; it was about a targeted attack on a specific hidden service.
Edman’s specific contribution was to help the FBI deploy a malicious update to the website’s server software. The site was running a version of a web server that had a known vulnerability. By exploiting this, the FBI could make the server send identifying information—specifically the real IP address of users who connected to it. This was a one-time, court-authorized operation, not a general backdoor in Tor.
How the Attack Worked: The NIT and IP Revelation
The technique used is called a Network Investigative Technique (NIT), which is essentially malware deployed by law enforcement. In this case, the FBI (with Edman’s help) modified the server’s response to visitors. When a user accessed the hidden site, the server sent a small piece of code that exploited a browser vulnerability. This code caused the user’s computer to send its real IP address directly to a government-controlled server, bypassing Tor’s anonymity entirely.
This attack did not break Tor’s onion routing protocol. Tor still works by bouncing traffic through three relays, and that part was not compromised. The vulnerability was in the web browser (Firefox) and the server software, not in Tor itself. The FBI exploited a known flaw in the application layer, not the anonymity network layer.
What Edman Actually Did (and Didn’t Do)
According to court documents and news reports from 2013, Edman’s role was to write the code that the FBI used to exploit the server vulnerability. He did not provide a universal key to decrypt all Tor traffic, nor did he reveal the identities of all Tor users. His help was specific to that one investigation. After the operation, Edman reportedly expressed regret and said he did not expect the case to become public. He was not charged with any crime, and he did not receive any public reward.
It is also important to note that Edman was not a core Tor project leader at the time. He was a contributor who had worked on Tor-related research. The Tor Project itself has stated that it was not aware of his involvement until the court documents were unsealed in 2013.
Why This Matters for Tor Users Today
This incident is often cited as proof that Tor is compromised, but that is an overstatement. The attack worked because the target site was running outdated software with known vulnerabilities. Tor’s anonymity is still strong when used correctly. However, the case does highlight a real risk: law enforcement can and will attack the applications that run on top of Tor, such as browsers and servers, even if they cannot break Tor itself.
For everyday users, the lesson is to keep your browser and operating system updated. The FBI’s NIT relied on a browser exploit that was patched long ago. If you use Tor Browser, it is automatically updated to include security patches. The risk is not from Tor’s design but from using outdated software or visiting malicious sites.
Common Misconceptions: Did He “Hack Tor” or “Help the FBI”?
The most common misconception is that Edman gave the FBI a master key to decrypt all Tor traffic. This is false. Tor’s encryption is end-to-end and would require breaking the network itself, which has not happened publicly. Another misconception is that this was a recent event; it happened in 2007, and the information became public in 2013. A third misconception is that all Tor developers are government agents. In reality, the Tor Project is a nonprofit that values privacy and has consistently opposed government surveillance.
What Edman did was help the FBI in a specific, targeted operation. It was a legal action with a court order. It did not compromise Tor for everyone, but it did compromise the anonymity of the users who visited that one site.
How to Protect Yourself on Tor
If you use Tor for privacy, here are practical steps to reduce your risk:
- Always use the official Tor Browser, which is configured with strict security settings.
- Never download or install additional browser plugins or extensions.
- Do not open documents or files you download while using Tor, as they can contain exploits.
- Keep your operating system and software updated.
- Use Tor for anonymous browsing, not for illegal activities, as law enforcement can still use other techniques.
These steps do not guarantee absolute anonymity, but they mitigate the types of attacks used in the Edman case.
Frequently Asked Questions
Did the Tor developer go to jail?
No. Matthew Edman was not charged with any crime. He cooperated with the FBI voluntarily and was not prosecuted. He later expressed regret about his involvement, but there were no legal consequences for him.
Can the FBI track Tor users now?
In general, no. The FBI cannot break Tor’s anonymity for all users. However, they can use targeted attacks, such as deploying malware or exploiting browser vulnerabilities, to identify specific users who visit certain sites. This requires a court order and technical expertise.
Is Tor safe to use after this incident?
Yes, Tor is still considered a strong anonymity tool. The 2007 attack was a targeted operation against a specific site, not a general compromise. As long as you use the latest Tor Browser and follow security best practices, your anonymity is generally protected.
Did the FBI pay the developer?
There is no public record of payment. Edman’s cooperation was voluntary, and there is no evidence that he received money or other benefits. He was a young researcher at the time, and his motivation appears to have been a desire to help law enforcement.
Is the Tor Project run by the government?
No. The Tor Project is a nonprofit organization that receives funding from various sources, including government agencies, but it is independent. Its mission is to advance human rights and privacy through free and open-source software. The project has publicly criticized government surveillance.
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