Cryptography

2019

Sunshine CTF 2019 - 16-bit-AES

Description Why so small? nc aes.sunshinectf.org 4200 Author: ps_iclimbthings Write-up Short write-up here. The server asked for a word to...

0CTF/TCTF 2019 Quals - zer0lfsr

Description Please enjoy the classical lfsr. zer0lfsr.tar.gz Attachment content chall.py keystream chall.py script from secret import init1,init2,init3,FLAG import hashlib assert(FLAG=="flag{"+hashlib.sha256(init1+init2+init3).hexdigest()+"}")...

2018

Pwn2Win 2018 - GCM

These were the steps to resolve Pwn2Win 2018’s GCM challenge, a challenge about a critical vulnerability in Python’s cryptography package....

Tokyo Westerns CTF - Revolutional Secure Angou Writeup

In this challenge we are given an encrypted file, flag.encrypted, a public key publickey.pem, and a prime generator generator.rb. flag.encrypted...

NeverLAN - Don't hate me

Don’t hate me This Message just might make you crazy. Lets take a stroll through the cipher history time line...