EFF is no longer working on pcapdiff, but development continues with the tpcat project.

Pcapdiff is a tool developed by the EFF to compare two packet captures and identify potentially forged, dropped, or mangled packets. Two technically-inclined friends can set up packet captures (e.g. tcpdump or Wireshark) on their own computers and produce network traffic between their two computers over the Internet. Later, they can run pcapdiff on the two packet capture files to identify suspicious packets for further investigation. See Detecting packet injection: a guide to observing packet spoofing by ISPs and EFF's Test Your ISP Project for more background.

Pcapdiff 0.1 is written in Python, is run from the command line, and requires the pcapy Python library. It should run on any OS where those two things are available. This is an early release of the software; more features and bug fixes are expected in the future.

Related Issues

Stay in Touch

NSA Spying

EFF is leading the fight against the NSA's illegal mass surveillance program. Learn more about what the program is, how it works, and what you can do.

Follow EFF

Here's a fun argument that the history of DRM stretches back 3000 years. In our view, that's 3000 years too long. http://motherboard.vice.com/r...

Nov 30 @ 12:59pm

HR 699 would update archaic rules about email privacy. Tomorrow it has a hearing in the House Judiciary Committee: http://judiciary.house.gov/in...

Nov 30 @ 12:31pm

“Los Angeles Just Proposed the Worst Use of License Plate Reader Data in History” —police technologist @nselby https://medium.com/@nselby/lo...

Nov 30 @ 10:57am
JavaScript license information