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Security B-Sides London 2014

29th April 2014 (that’s a Tuesday)
Kensington and Chelsea Town Hall, Hornton Street, London, W8 7NX
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Tuesday, April 29 • 3:00pm - 3:45pm
Tor: Attacks and Countermeasures LIMITED

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Limited Capacity seats available

Tor is an anonymisation network which allows users to browse the internet without their true IP
address being identified. Tor also allows those in countries who censor the internet to bypass that
censorship both by allowing users to access censored sites and to host websites which would
otherwise land them in jail if it were possible to trace them.

Initially, I will talk about how Tor works explaining the infrastructure and high-level protocol. I will
also introduce Tor Hidden Services, untraceable websites, and how this service is provided within
the network. Briefly, I then touch on the Silk Road and Freedom hosting hidden sites.

Secondly, I will talk about I will explain how countries such as China and Iran have attempted to
block Tor and what steps have been taken to minimise this. I will also explain attacks against the Tor
users and network infrastructure that have been developed in academia (and the community) along
with defences that can be deployed to minimise the risks.

Finally, I will cover how the FBI took down Silk Road and delivered an exploit that was able to
deanonymise visitors to Tor hidden services – covering the Firefox exploit and shellcode.

avatar for Dr Gareth Owen

Dr Gareth Owen

Senior Lecturer, University of Portsmouth
I'm the course leader for the Forensic Computing degrees and a cyber security researcher with specific interests in reverse engineering and memory forensics.

Tuesday April 29, 2014 3:00pm - 3:45pm
Small Hall The Town Hall, Hornton Street, London W8 7NX