Sebastian's Blog

software developer. security enthusiast.

Day: 7 December 2019

HV19.H2 Hidden Two

Again a hidden flag. Challenge Description As Hidden Two came out the same time as HV19.07 Santa Rider I thought it might be again of the challenge that also came out that day like before with Hidden One. I thought it was odd, that there was a download for a zip containing the video of […]

HV19.07 Santa Rider

Santa is prototyping a new gadget for his sledge. Unfortunately it still has some glitches, but look for yourself. Challenge Description This was very easy, we got 8 LEDs, so 8 bit = 1 byte. Looks like ASCII. I split the video into frames using ffmpeg to go through the pictures by hand while noting […]