The Skull CTF

by Wokwi

A mind-bending hardware puzzle in three acts

View all updates Nov 05, 2020

Blessing the Bytes

by Uri Shaked

Ahoy Mateys!

[▓▓▓▓▓▓▓▓▓▓▓▓░░░] 81%

First and foremost, the firmware. We’ve summoned a shaman from the deepest, darkest jungles of a long-forgotten land, and she’s been working night and day, performing ancient bytecode incantations to bless our compilers.

Dark Rituals in Progress

During last night’s séance (conducted through zoom, of course), we were visited by a mysterious entity who gifted us with a pair of binary-encoded numbers that turned out to be a latitude and a longitude. Early this morning, we hired on with a crew of buccaneers, mutinied to gain control of their ship, and sailed her to those coordinates.

Diving into the sea, we found a locked chest and, inside it, two carefully typed scrolls containing some very cryptic code. We’re not exactly sure what it does, but we can tell—based on the author’s diabolical use of white space—that it comes from beyond the grave. Following widely recognized best practices, we decided to embed it into our firmware and hope for the best.

Before we could get started, however, our shaman issued a stern warning: to avoid a disastrous outcome, we must choose only one of the two scrolls and discard the other. Which is where YOU come in. We invite you to cast you vote and help us determine…

which piece of code looks more wicked!?


SGVyZSB5b3UgZ28sIHlvdSBmb3VuZCB0aGUgInNlY3JldCIgbWlzc2lvbjogcGx6IGhlbHAgdXMgZmlu
ZCBncjggc2t1bGwgcHVucyBAIGh0dHBzOi8vdHdpdHRlci5jb20vc2t1bGxjdGYvc3RhdHVzLzEzMjM5
NDM3MTc5MDA3OTE4MDg=

About the Author

Uri Shaked

urish


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$20

The Skull

A single The Skull CTF board (☠)


$32

Two Skulls

A two-pack of The Skull CTF boards (☠☠)


$45

Three Skulls

A three-pack of The Skull CTF boards (☠☠☠)


$128

Pile o' Skulls - Classroom Pack

A ten-pack of The Skull CTF boards. (☠☠☠☠☠☠☠☠☠☠) Perfect for classrooms, workshops, conferences, and very nerdy Halloween parties.


$19

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.


$16

(Early Bird!) The Skull

A single The Skull CTF board (☠)

Credits

Wokwi

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


Uri Shaked

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