CS 244 ’20: Reproducing “Large Scale Simulation of Tor” in Shadow

Privacy over the internet is a critical issue worldwide, as more and more of the world executes business and personal transactions over the internet. Tor is a network layer that allows for anonymous internet activity for its clients by routing through ‘onion routers’, and claims to be a completely secure and private system for its clients. In ‘Large Scale Simulation of Tor’ by Blott et. al., the security weaknesses of Tor are explored through the lens of the SSFNet simulator. For this project, we look to a more modern simulator called Shadow that hopes to more faithfully reflect the actual Tor topography, traffic patterns, and source code, in order to build a more accurate simulation. This project aimed to recreate a connection-starting attack over the Shadow simulator, which proved to be possible only on a smaller scale of the total Tor network due to computational limitations. Recreating such attacks in the Shadow environment is critical to building a secure Tor network, and for users to have faith in the product that they are utilizing.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s