Symmetric encryption uses the same key for both encryption and decryption. This makes it fast and efficient, but requires secure key exchange.

Available Algorithms:

• Classic Enigma: Based on the WWII encryption machine with rotors and reflectors.
• AES: Advanced Encryption Standard, modern and highly secure.
• Triple DES: An extension of the Data Encryption Standard.
• RC4: A simple stream cipher (not recommended for high security).
• Vylex Cipher: A custom-designed cipher for educational purposes.

For maximum security:

• Use long, complex keys with mixed characters
• Never reuse the same key
• Choose modern algorithms (AES) for sensitive data
• Use a secure channel to share your encryption key