For those who have not come across Tor before, it is a system for anonymous communication:
Tor is a network of virtual tunnels that allows people and groups to improve their privacy and security on the Internet. It also enables software developers to create new communication tools with built-in privacy features. Tor provides the foundation for a range of applications that allow organizations and individuals to share information over public networks without compromising their privacy.I am not familiar with Austrian law, but, were I in this position — and I must confess that I have advised against running Tor exit nodes before, on the basis of the possibility, which I'd actually rated as a likelihood, of law enforcement activity against you as the operator — I would be looking to argue that I was protected by Art. 12, 2000/31/EC:
Where an information society service is provided that consists of the transmission in a communication network of information provided by a recipient of the service, or the provision of access to a communication network, Member States shall ensure that the service provider is not liable for the information transmitted, on condition that the provider:This the "common carrier" wording which most Internet access providers rely on as a shield from prosecution for exactly this sort of activity — there's a bit of a disjunct around whether the activity is actually the provision of an electronic communications service rather than an information society service, but the underlying principle seems that it should apply here.
- does not initiate the transmission;
- does not select the receiver of the transmission; and
- does not select or modify the information contained in the transmission.