Shadow: Run Tor in a Box!

Shadow is an open source discrete-event simulator written in the C programming language that runs the Tor software as a plug-in. Shadow makes running Tor experiments easy while reducing the time required to produce accurate results.

Shadow does the following:

• natively executes real applications like Tor
• provides efficient, accurate, and controlled experiments
• models network topology, latency, and bandwidth
• models the Tor network using Tor metrics
• runs without root on a single Linux box, or in the cloud
• simulates multiple virtual nodes in virtual time
• simulates network, crypto, CPU processing delays
• much, much more!

Read more about Shadow, or skip to the download page now!