ZCrypt

Basic decryption tool

Author's Note

ZCrypt is a basic decryption tool for all CTF enthusiasts especially for Crypto-analysts which covers XOR and RSA techniques.

Features

RSA Attacks

• (c,n,e)
• (c,p,q,e)
• (c,n,e,{p or q})
• (c,n,d)
• (c1,c2,c3,n1,n2,n3) [Hasted Broadcast Attack]
• (c,e) [Small Exponent("e") Attack]
• (c,p,q,dp,dq) [Chinese Remainder Theorem]
• (c,n,e) [Fermat Factorization]
• (c1,c2,n1,n2,e) [Common Factor Attack]
• (c1,c2,e1,e2,n) [Common Modulus Attack]

XOR

• Single Byte XOR
• Repeating Key XOR

Many updates are going to release in future.

Installation

git clone https://github.com/malladisiddu/ZCrypt.git

Requirements

cd ZCrypt
apt install libgmp-dev libmpfr-dev libmpc-dev
pip3 install -r requirements.txt 

Usage

python3 ZCrypt.py