I became interested in Tor in the spring of 2007 after reading about the situation in Burma and felt that I would like to do something, anything, to help. As a geek and lover of the internet it seemed the best thing I could do was to run Tor as an exit node to allow those under jurisdictions that censor the internet free access to the information they need. I had a lot of unused bandwidth and it seemed like a philanthropic use of it to donate that to Tor.

Tor is a system of anonymizing proxy servers which allows you to visit resources on the web, not just web sites, without revealing your ip address. This is extremely useful for those who are compromised in their access to the internet because it means, rather than attempting to connect directly to the resource in question, say Wikipedia, which might be filtered by their government, they connect to a Tor relay which ultimately routes the request to the resource in question via an exit node. Exit nodes are special kinds of relays which proffer the request on behalf of the original client revealing their ip address, not that of the original requestor, to the destination resource. I sometimes imagine how exciting it must be for soemone in Burma, say, or China, to load up Tor and browse to a web site they have never been able to see before. And to know that there is nothing, nothing, that reveals who it really is who is visiting.

I totally believe in Tor. I think it is a magnificent force for the circumvention of internet censorship but there is a problem.

I was visited by the police in November 2008 because my ip address had turned up in the server logs of a site offering, or perhaps trading in (I was not told the details of the offence) indecent images of children. The date of the offence was about one month after I started the server so it looks as though the site in question had been under surveillance for more than a year.

It was what is known as a ‘dawn raid’ and, amazingly enough, my children were still asleep when it occured. Thank God.

I explained to the officers, who we had heard threatening to break the door down before we let them in, about Tor but they had never heard of it. My wife says she thinks they were about to arrest me before that. I was not arrested. I was told not to touch the computer and it was placed, considerately, in a black plastic bag and taken away for forensic examination.

I was OK at first. I knew that somebody had gone through my server to access that material and that I was not guilty of any offence but as the weeks wore on it started to get to me.

I was overwhelmed by horror to be implicated in such a thing. I was desperately worried about my family. One of the officers had told my wife that Social Services would be informed as a matter of course and there was a possibility that my children would be taken into care.

The low point came about two weeks after the visit by the police when I totalled my car. I was distracted, stressed and unable to accurately assess the road conditions. I ploughed into a hedgerow at speed, destroying the car which we had just bought, but, luckily, walked out of it with only bruised ribs.

I didn’t have the money to hire a lawyer so I just sat the thing out. From time to time the police called with an estimate of when the investigation would be finished but none of that meant very much because those dates came and passed with no resolution.

Eventually, four months after the visit, I picked up a voice message from the police inviting me to call back. When I called I was told that no evidence had been retrieved and the machine would be returned to me.

I think, in retrospect, I was desperately naive to run a Tor exit server on a home computer but I didn’t believe that an ip address in a server log would be enough evidence to warrant seizing equipment.

My wife, God bless her, was absolutely marvellous throughout the whole thing and never doubted me.

I have read with interest about the need to make Tor faster and that that largely depends on having more nodes but there is no way I can contemplate offering my ip address as a service to internet anonymity any more.

It was very frightening for me to be implicated in a serious crime.

As a parent of very young children I have an extensive network of friends and contacts in my neighbourhood who also have children. As we know the subject of paedophilia is not one that can be debated with any rationality at all in the UK. It is surrounded by hysteria. I was terrified that people would find out that my computer had been taken because of that – ‘no smoke without fire’.

I don’t know what can be done about any of this. To my mind running an exit node is extremely high risk. I think Tor is important but I don’t have any ideas about how to support it at the moment.