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I've literally implemented #2 and #3 for a CTF already. (Well, #3 was "correct damaged data in this bin/cue", which is easiest done by just burning it but could be done with some obscure open source tool to apply reed-solomon correction too)
Also things I've done: - Broadcast FM numbers station - Tek 4014 TTY vector art - Decode 100BASE-TX from a wav file - Linux 1.0 VM crackme - FreeDOS crackme - Mac OS 9 crackme (packed with StuffIt because I needed the resource fork!) - Mainframe pwn chal (z/OS USS exploitation)
- Gopher challenge (need to automate / scrape a Gopher site) - One where you physically had to go around plugging in to analog audio ports (3.5mm, then RCA, then banana plugs) - Audio scrambled with spectral inversion (nagravision pay tv style) And more I'm forgetting :-)
Do you have some of them published anywhere to grab by any chance? :)
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