My self-made Python implementation of the RSA algorithm

The script allows you to encrypt and decrypt a message using a pair of prime numbers.

Important clarification!!!

The .exe file is in releases. This .exe file does not have viruses. It was created for convenience. I made this file thanks to python -m PyInstaller --onefile .... If you do not trust the .exe file, I recommend you to use the .py file.

Functionality:

• Entering a message (English or Russian, you choose).
• Conversion to numeric format.
• Key generation (p, q, d, e).
• Encryption and decryption.
• Display of intermediate steps.

How does it work?

1. Open the .exe file or .py file.
2. You choose English or Russian. 1 or 2, respectively.
3. Write the message (one word). You can write uppercase and lowercase letters.
4. Choose the prime number p that you want.
5. Choose the prime number q that is greater than p. Warning: this code doesn't accept a combination of (p;q), respectively: (2;3),(2;5),(2;7),(3;5). The program will ask you to choose other numbers.
6. The program calculates all the values using formulas and outputs an encrypted message and decrypts it at the same time.

Important: This implementation is intended for educational purposes. Do not use it in production or in real security systems.