Cipher Generator

A simple encryption and decryption tool that supports Vigenère and Caesar ciphers. Works with all printable ASCII characters (codes 32–126).

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Features

• Encrypt or decrypt text:
  • Vigenère Cipher: Key-based encryption using a string.
  • Caesar Cipher: Shift-based encryption using an integer.
• Interactive menu-driven interface.
• Input validation for plaintext, ciphertext, and keys.

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Example Usage

Encrypt with Vigenère Cipher:

Plaintext: Hello, World!
Key: KEY
Ciphertext: Riodc+%bwe|i%

Encrypt with Caesar Cipher:

Plaintext: Hello, World!
Key: 5
Ciphertext: Mjqqt%\twqi&

Decrypt with Vigenère Cipher:

Ciphertext: Riodc+%bwe|i%
Key: KEY
Plaintext: Hello, World!

Decrypt with Caesar Cipher:

Ciphertext: Mjqqt%\twqi&
Key: 5
Plaintext: Hello, World!