The Skull CTF

A mind-bending hardware puzzle in three acts

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…


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