HackDay 2026 - Qualifications
13 challenges with 14 published solutions between them. No writeups were ever filed against this event's listing, so its solutions were found in public repositories instead. Each link is pinned to the commit it was read from.
The event listingUncategorised11
The upstream scoreboard did not say, so neither do we.
As Small As Possible
1 official solutionAlso written up in: Ax8457/WriteUPs
Back To Super Increasing Era
1 official solutionAlso written up in: Ax8457/WriteUPs
Cryptographie
1 official solutionAlso written up in: LiliRoseGicquel/PFE-CTF-Writeups
Deep Filter
1 official solutionAlso written up in: LiliRoseGicquel/PFE-CTF-Writeups
HTTPS is the Most Secure Browsing
1 official solutionAlso written up in: learnerxuan/CTF
Let's Meet
1 official solutionAlso written up in: Ax8457/WriteUPs
Polyglot
1 official solutionAlso written up in: LiliRoseGicquel/PFE-CTF-Writeups
Small Exploit
1 official solutionAlso written up in: Ax8457/WriteUPs
The Glitch in the Matrix
1 official solutionAlso written up in: learnerxuan/CTF
The Lotery
1 official solutionAlso written up in: Ax8457/WriteUPs
The Roughness of Vigenere
1 official solutionAlso written up in: Ax8457/WriteUPs
Reverse engineering2
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Your Mov
2 official solutionsAlso written up in: MedjberAbderrahim/CTF-Writeups, MedjberAbderrahim/CTF-Writeups
Description
1 official solutionAlso written up in: MedjberAbderrahim/CTF-Writeups