Steps: Investigate binary and identify the transform pipeline in main. Note the binary reads palantinepackflag.txt, then three class to an expand routine with a shuffle, and one earlier flipB...

At the end of 2025 I decided that I wanted to build a home lab. Not for anything fancy or specific, but to hone my system administration skills, do some security labs, and use it as a file storage ...

Last fall, I joined the FSU ACM Question Writers team for our semi-annual programming contest. I was chosen to write two questions for the COP4530 Data Structures II class at FSU. The two problems...

Recently I purchased Battlefield 6. The game is actually really fun and refreshing. Only one issue though, my game crashes after ~20 minutes of gameplay. This has been incredibly frustrating for m...

Steps Open Ciphertext Read hint, understand an 8-byte key is required. Also understand that it is a cyclic XOR problem XOR first 7 bytes of the ciphertext with the first 7 known letters of ...

Steps Open info.txt Observe it is an RSA problem Find the q to part one by using FactorDB.com with the n Use script that solves the encryption for part 1 of the flag For part 2, find th...

Steps Collect all nine (n,c) pairs. Write a script that does the following Iterate over every combination of three pairs. For each triple, use CRT to compute X≡c(mod n) this yields X=m^...

Steps Reviewed the decompiled binary to understand that it performs four elemental tests by decrypting encrypted scrolls using XOR with a key. Identified that each decryption key is chosen by...

Steps Connect and read the AES-ECB encrypted flag’s hex, splitting it into 16‑byte blocks. Note which blocks correspond to known characters fsuCTF{ } and mark them. For each unknown block i...

Steps Open the droids.jar file in a java decompiler Find class files Find flagcheckin.class main function file Find function detailing flag reconstruction process and relevant files Use...