PyRSA

Encrypt messages to your friends with python and RSA!

Instructions

1. Download the repo

git clone https://github.com/jherzberg/PyRSA.git

2. Run generate_keys.py in the command line

python generate_keys.py

3. Give your friend your public keys

4. Your friend runs encrypt_message.py with your public keys and their message*

python encrypt_message.py <public key e> <public key n> 'hello world'

5. Your friend gives you the encrypted message

6. Run decrypt message with your private keys

python decrypt_message.py <public key n> <private key d> <encrypted message>

*Only [A-Za-z] characters

Update: Now intercept and decrypt your friends' messages too!

Instructions

1. Repeat as above

2. Obtain public keys and the encrypted message

3. Choose your solving method. Currently there are two options.

• A look up table
• Pollard's Rho algorithm

4. To solve with the lookup table, you will also need a list of primes at least as large as that which your friends used. Currently, it imports from the generate_keys.py file. Then run lookup_table.py.

   python lookup_table.py <public key e> <public key n>

5. TO solve with the Pollard Rho algorithm, simply run pollard_rho.py

   python pollard_rho.py <public key e> <public key n>