The Skull CTF

by Wokwi

A mind-bending hardware puzzle in three acts

View all updates Dec 07, 2020

Answers Begin to Manifest...

by Uri Shaked

Ahoy Mateys!

The 48th Prime Number%

Today, we took our entire team of Skulls to a resort so they could relax and prepare for the final week of the campaign!

As soon as we got back, however, we received a phone call from the CEO of Crowd Supply, and he was not happy. Apparently, we forgot to include the invite link for Wednesday’s AMA in our previous update. Once we got him calmed down, we swore that we’d include the link in this update, and he said he’d "let it slide. This time." So here you go:

ⓗⓣⓣⓟⓢ://ⓓⓘⓢⓒⓞⓡⓓ.ⓖⓖ/ⓋⓚⒺⒹⓍ④Ⓢ⑦Ⓙⓨ


We also want to thank @YoavW for discovering the secret in her eyes! But don’t worry, the challenge is still open for the rest of you. If you figure it out, simply send us a SHA-256 hash of the following three items: the solution, a space character, and your Twitter username (e.g. echo -n "solution mytwitter" | sha256sum). Sorry about the extra hassle. Our shaman recently warned us that, "to avoid a disastrous outcome," we must NEVER send the solution in cleartext…

About the Author

Uri Shaked

urish


$4,254 raised

of $666 goal

638% Funded! Order Below

Product Choices

$25

The Skull

A single The Skull CTF board (☠)


$20

Programmer & Header

Cheat! Or, better yet, design your own puzzles and load them into The Skull's brain using the included SparkFun PGM-09825 AVR Pocket Programmer. Also comes with a ribbon cable and the SMT header you'll need to use it. (Does not include the MiniUSB cable.) Some soldering skill required.

Credits

Wokwi

Wokwi creates tools for the Arduino and maker community, such as AVR8js, the Open source Arduino Simulator, and GoodArduinoCode.


Uri Shaked


JA Electronics

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