Recent writeups
Integral Communication
01/11/2024
Stephen does some crypto problems, featuring AES CBC Bit Flipping!
armbox
12/03/2023
We don't have enough compute to run full system emulation for seccomp D: You'll have to make do with this budget seccomp implementation.
hopscotch
12/03/2023
These one byte write challenges have been all the rage recently, so I decided to write one too!These one byte write challenges have been all the rage recently, so I decided to write one too!
permissions
07/18/2023
Every programmer should read the Intel Software Developer Manuals at least once.
Horsetrack
05/04/2023
I'm starting to write a game about horse racing, would you mind testing it out?
Bank
05/04/2023
I came up with this banking system that lets you deposit as much as you want. I'm not sure why, but my friend said it was a terrible idea...
Contrived Shellcode
05/04/2023
There's a 0% chance this has any real world application, but sometimes it's just fun to test your skills.
Encryptinator
05/04/2023
I have made this super secure encryption engine. I'll encrypt any message and no one will ever be able to read it. Not even me!
Randomness
05/04/2023
I made this program to test how srand and rand work, but it keeps segfaulting. I don't read compiler warnings so I can't figure out why it's broken.
Sea Shells
05/04/2023
Sally sold some seashells by the seashore. Try to guess how many she sold, I bet you will never be able to!
Sequel Sequel
07/24/2022
I must confess I have never connected to a sequel database in a gui before.
Eunectes Murinus
06/10/2022
Oh look it's a python compiled file that guards a flag. Can we decompile?
Hacking Part 2
06/10/2022
Eljimike is back at it again with his weird hacking contests. Can you help him this time?
Bit Flipping Machine
05/08/2022
We just made a machine that can remotely flip bits to change the memory contents of enemy computers. You are tasked with demonstrating the power of this machine...
Internprise Encryption
05/08/2022
Our new intern Dave encrypted all of our important company files with his homemade "military grade encryption scheme" to try and improve company security...
Oil Spill
05/08/2022
Darn, these oil spills are going crazy nowadays. It looks like there's a little bit more than oil coming out of this program though...
Oracle
05/08/2022
An oracle is a black box in a Turing machine. You can run it but how do you inspect it?
Secure Horoscope
05/08/2022
Our horoscope developers have pivoted to a more security-focused approach to predicting the future. You won’t find breaking into this one quite so easy!
basic-mod1
03/29/2022
We found this weird message being passed around on the servers, we think we have a working decryption scheme.
credstuff
03/29/2022
We found a leak of a blackmarket website's login credentials. Can you find the password of the user cultiris and successfully decrypt it?
Wizardlike
03/16/2022
Do you seek your destiny in these deplorable dungeons? If so, you may want to look elsewhere. Many have gone before you and honestly, they've cleared out the place of all monsters...
Safe Opener
03/15/2022
Can you open this safe? I forgot the key to my safe but this program is supposed to help me with retrieving the lost key. Can you help me unlock my safe?
Bloat.py
03/15/2022
Can you get the flag? Run this Python program in the same directory as this encrypted flag.
file-run1
03/15/2022
A program has been provided to you, what happens if you try to run it on the command line?
file-run2
03/15/2022
Another program, but this time, it seems to want some input. What happens if you try to run it on the command line with input "Hello!"?
Patchme.py
03/15/2022
Can you get the flag? Run this Python program in the same directory as this encrypted flag.