Deep Space Networking

Deep Space Networking

[WORKSHOP] AUGUST 7-9, 2020  9:00 AM – 4:00 PM PDT

The Deep Space Networking workshop in the Aerospace Village at
DEFCON  Safe Mode will challenge your ability to investigate and find important data within complicated technological communications. Trace file provided by Vint Cerf from the original test lab for Delay and Disruption Tolerant Networking. (DTN)!!
Presented by Laura Chappell, Chappell University.

Workshop PCAP Files: (new!)

Workshop PDFs: Challenge 1, Challenge 2 ver. 2 (new!), Challenge 3 (new!),  Recommended Steps and Hints 



(1) Peruse the tcpcl_we2ereceipt.pcap trace file to get a feel for the data transfer traffic.

(2) Take a stab at Challenge 1 – answers are in the pdf.

(3) Feeling struck/frustrated? Read the Hints/Tips pdf.

(4) PULLING YOUR HAIR OUT? Watch the video of my analysis process.

(5) Take a stab at Challenge 2 – answers are in the pdf.

(6) Pat yourself on the back!

Join the DEF CON 28 Discord Server, then navigate to #av-space-networking-text channel for FAQs & discussions during the hours of

  • Friday: 09:00-19:00 PDT
  • Saturday: 09:00-19:00 PDT
  • Sunday: 09:00-17:00 PDT

Abstract:  Deep space communications utilize TCP/IP protocols with some added assistance from a TCP Convergence Layer and the Bundle Protocol. In this workshop, participants will examine the store-and-forward techniques used to transmit “bundles” of information from one host to another via a relay system.

Using the latest version of Wireshark, participants will examine the TCP Convergence Header and locate the first packet of a bundle and the first and second legs of the relay process, as reassembled by Wireshark. After identifying the content contained within the bundle, participants will create a filter to locate the last packet of a bundle and examine key fields of the Bundle Protocol, including fields that define priority, destination type, endpoint IDs, and reporting of bundle delivery.