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OOO archive --- DEF CON CTF [ login ]

dc2020q - notbefoooled crypto

by tiffanyb

This was a jeopardy challenge, part of dc2020q. (CTFtime)

Points: 143
Was solved by: 30 teams
PCAPs: download

You may spawn the server:

On your laptop
  • Install docker
  • docker pull archiveooo/pub:notbefoooled (docker-saved download)
  • docker run -d --name notbefoooled archiveooo/pub:notbefoooled
  • Local IP: docker inspect notbefoooled -f '{{ .NetworkSettings.Networks.bridge.IPAddress }}'
  • Connect to that IP:5000 — Remember to docker rm -f when done.
On your laptop (full source)
  • Install docker and pip install PyYAML coloredlogs
  • git clone https://github.com/o-o-overflow/dc2020q-notbefoooled-public
  • cd notbefoooled
  • ./spawner --log-level=INFO
  • Connect to the ip:port displayed
Hosted by OOO Right now we're asking players to login first.

Description

What's the trick to not be foooled?

line_weight service.sage

Hints

None yet :(
If you wish, you can contribute some.

Source

Spoilers ahead! Code for this challenge is publicly available.