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