Capturing Flags with Microbits
summary
Five weeks of learning delivering and assessing produces a classroom CTF that uses micro:bit radio networks, Python browser editors and USB serial to emulate services across 82 channels with personalized student routers to stop cheating. Challenges include building channel scanning tools vs slow reflashing one student maps the network in under a minute. Ciphers progress from rotation and substitution through Vigenere and Morse and the system works far better than expected with high student engagement.
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chapters (14)
- 0:00Introduction
- 1:46Speaker background
- 3:31What is micro:bit
- 5:17Teaching cyber security
- 8:29Planning the CTF exam
- 10:39Setting up the network
- 13:09Student feedback
- 15:00Network mapping part A
- 17:09Bot conversations
- 20:00Preventing cheating
- 21:47Cracking ciphers
- 23:30Final stages
- 24:54Student reactions
- 25:38Key takeaways
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