[HV22.25] Santa’s Prophesy
Based on an old fairytale from Kobeliaky, Santa can provide more than presents. He can show you the future!
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[HV22.H3] Ruprecht’s Secret
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[HV22.24] It’s about time for some RSA
Santa is giving autographs! And at the end of the signing session he’ll also give out the flag! But better hurry; as Santa has lot’s to do this time of year,...
[HV22.23] Code but no code
Santa loves puzzles and hopes you do too ;) Find the secret inputs which fulfil the requirements and gives you the flag.
[HV22.22] Santa’s UNO flag decrypt0r
The elves made Santa a fancy present for this Christmas season. He received a fancy new Arduino where his elves encoded a little secret for him. However, San...
[HV22.21] Santa’s Workshop
Santa decided to invite you to his workshop. Can you find a way to pwn it and find the flag?
[HV22.20] § 1337: Use Padding 📝
Santa has written an application to encrypt some secrets he wants to hide from the outside world. Only he and his elves, who have access too all the keys use...
[HV22.19] Re-Entry to Nice List 2
The elves are going web3! Again…
[HV22.18] Santa’s Nice List
Santa stored this years “Nice List” in an encrypted zip archive. His mind occupied with christmas madness made him forget the password. Luckily one of the el...
[HV22.17] Santa’s Sleigh
As everyone seems to modernize, Santa has bought a new E-Sleigh. Unfortunately, its speed is limited. Without the sleight’s full capabilities, Santa can’t ma...
[HV22.16] Needle in a qrstack
Santa has lost his flag in a qrstack - it is really like finding a needle in a haystack.
[HV22.15] Message from Space
One of Santa’s elves is a bit of a drunkard and he is incredibly annoyed by the banning of beer from soccer stadiums. He is therefore involved in the “No Ret...
[HV22.14] Santa’s Bank
Santa has lost faith and trust in humanity and decided to take matters in his own hands: He opens a new bank.
[HV22.H2] The Elves’s Secret
Uhm…hello? What are you doing here? I thought you were tasked with finding a hidden flag in one of the medium challenges??
[HV22.13] Noty
After the previous fiasco with multiple bugs in Notme (some intended and some not), Santa released a now truly secure note taking app for you. Introducing: N...
[HV22.12] Funny SysAdmin
Santa wrote his first small script, to track the open gifts on the wishlist. However the script stopped working a couple of days ago and Santa has been stuck...
[HV22.11] Santa’s Screenshot Render Function
Santa has been screenshotting NFTs all year. Now that the price has dropped, he has resorted to screenshotting websites. It’s impossible that this may pose a...
[HV22.10] Notme
Santa brings you another free gift! We are happy to announce a free note taking webapp for everybody. No account name restriction, no filtering, no restricti...
[HV22.09] Santa’s Text
Santa recently created some Text with a 🐚, which is said to be vulnerable code. Santa has put this Text in his library, putting the library in danger. He doe...
[HV22.08] Santa’s Virus
A user by the name of HACKventSanta may be spreading viruses. But Santa would never do that! The elves want you to find more information about this filthy im...
[HV22.07] St. Nicholas’s animation
Santa has found a weird device called an “Oxocard Blockly”, which seems to display a sequence of images. He believes it has got something to do with a QR cod...
[HV22.H1] Santa’s Secret
S4nt4444…..s0m3wh3r3 1n th3 34sy ch4ll4ng3sss…..th3r3s 4n 34sy fl4g h1ddd3333nnnn…..sssshhhhh
[HV22.06] privacy isn’t given
As every good IT person, Santa doesn’t have all his backups at one place. Instead, he spread them all over the world. With this new blockchain unstoppable te...
[HV22.05] Missing gift
Like every year the elves were busy all year long making the best toys in Santas workshop. This year they tried some new fabrication technology. They had fun...
[HV22.04] Santa’s radians
Santa, who is a passionate mathematician, has created a small website to train his animation coding skills. Although Santa lives in the north pole, where the...
[HV22.03] gh0st
The elves found this Python script that Rudolph wrote for Santa, but it’s behaving very strangely. It shouldn’t even run at all, and yet it does! It’s like t...
[HV22.02] Santa’s song
Santa has always wanted to compose a song for his elves to cherish their hard work. Additionally, he set up a vault with a secret access code only he knows!
[HV22.01] QR means quick reactions, right?
Santa’s brother Father Musk just bought out a new decoration factory. He sacked all the developers and tried making his own QR code generator but something s...