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How Logistep catches file sharers

It is no secret that companies like Logistep are monitoring p2p networks to sue file sharers who are offering software from clients like Zuxxez, a German company who recently sued 500 British p2p users claiming that they illegally distributed the game Dream Pinball 3D. The website Torrentfreak got their hands on a copy of one of those letters that have been send out which details the process of how Logistep determines which users are illegally distributing the game.

Logistep uses a software called File Sharing Monitor that targets E-Donkey and Gnutella users. Here is how it works:

  • The software connects to a p2p server and requests a filename recording all IP addresses that offer that name
  • They request to download the file and if the download is permitted record the following information into a database
  • Filename, file size, IP of the distributor, P2P protocol, P2P application, the time and the username
  • When this is inserted the application does a automatic whois and is able to send an infringement letter to the ISP

I think it is interesting to note that this is almost an automatic process which leads to some questions. How do they know which archive has the correct size and is actually their product and not a broken archive ? Is not it only possible to know the exact file size if they downloaded it at least once to verify that is is indeed their product ?

Let us assume that they are not stupid and that they filter out every file below a certain size to prevent that users who do share mods or patches get sued. Let us further assume that a file that is labeled a certain way (with group tags) and shared among many users is the right program. Does this mean that the user that they are suing is responsible ? They will always sue the account holder which could or could not be the person who shared the files.

What possible solutions can I think of that make the Logistep file monitor useless ? Please note that this is hypothetic, I’m not advising anyone to actually use the methods listed below.

  • don’t share files
  • share only files with no plausible filename (3dpd)
  • use encryption to share the files
  • use vpns like Relakks
    to share them
  • switch to Usenet
  • buy the game ;)

Can you think of anything else left to say ?

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About the Author:Martin Brinkmann is a journalist from Germany who founded Ghacks Technology News Back in 2005. He is passionate about all things tech and knows the Internet and computers like the back of his hand. You can follow Martin on Facebook or Twitter.

Author: , Sunday April 15, 2007 -
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Responses so far:

  1. Michael Griffin says:

    Cox sent a letter regarding use of a torrent downloading/sharing a file to someone I know. This possibily what was used to track him.

  2. Quasimodo says:

    Just ENABLE and FORCE protocoll obfuscation in the eMule security options (.47c).

    Since Logistep uses a Shareaza derivate, you will avoid ANY communication with those clients !!!!

  3. Quasimodo says:

    The same goes for utorrent and Azureus.

    Force the protocoll obfuscation.

  4. Quentin Crisp says:

    All the posts so far are very inaccurate and what has been suggested will have little or no real effect on the program used .
    Under new laws to come into force in the UK all ISP will be forced to give your details automatically via the system in place at the ISP.
    UK law is to be 20 years ahead of many other nations and i wish to thank the UK government for such enlightened thoughts

  5. Tobster says:

    Forcing ISP’s to store everything someone does on the internet so the government can constantly spy on it’s citizens? I’m afraid we don’t share the same definition of ‘enlightened thoughts’.

    The first part of your post is also factually wrong.

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