Digital Signature Creator

Project Description

Digital Signature Creator is a Python-based project that generates public and private keys, and creates digital signatures for a given message using RSA cryptography. This project is designed to demonstrate the fundamental principles of digital signatures and public key cryptography.

Features

• RSA Key Generation: Generates a pair of RSA keys (public and private) with 512-bit prime numbers.
• Digital Signature Creation: Signs a user-provided message using the RSA private key and SHA-256 hashing algorithm.
• Base64 Encoding: Encodes the generated digital signature in Base64 format for easy readability and transmission.
• Key Export: Exports the public and private keys in PEM format.

Usage

1. Clone the Repository:

   git clone https://github.com/zorohack03/AuthentiKey.git
   cd AuthentiKey

2. Install Dependencies: Ensure you have pycryptodome installed:

   pip install pycryptodome

3. Run the Script:

   python digital_signature_creator.py

4. Enter Your Message: When prompted, enter the message you want to sign.

How It Works

1. Prime Number Generation: Generates two large prime numbers (512 bits each).
2. Compute n and φ(n): Computes the modulus n and the totient φ(n).
3. Public Exponent Selection: Chooses a public exponent e that is coprime with φ(n).
4. Private Exponent Calculation: Calculates the private exponent d using the modular inverse of e.
5. RSA Key Construction: Constructs the RSA public and private keys using the calculated values.
6. Message Hashing: Hashes the input message using SHA-256.
7. Digital Signature: Signs the hashed message with the RSA private key.
8. Base64 Encoding: Encodes the digital signature in Base64 format.
9. Key Export: Exports the RSA public and private keys in PEM format.