You have a device that is nearly completely bricked, but it seems to progress to a stage in boot where you can run your own code, and it conveniently has 8 LEDs. You write a small binary to read the bootlog and emit it, compressed, byte-by-byte on the LEDs. With a phone camera and a shaky hand, you record the LEDs.
Decode the video.
Continue reading [sCTF 2016] [CODE 100 – Deblink] Write Up
A numbers game
(code50, solved by 406)
Description: People either love or hate math. Do you love it? Prove it! You just need to solve a bunch of equations without a mistake.
Continue reading [Internetwache CTF 2016] [Code 50 – A numbers game] Write Up
It’s Prime Time!
(code60, solved by 388)
Description: We all know that prime numbers are quite important in cryptography. Can you help me to find some?
Continue reading [Internetwache CTF 2016] [Code 60 – It’s Prime Time] Write Up