Implementing the Vigenère Cipher in Java

Learn how to implement the Vigenère Cipher encryption and decryption algorithm in Java with this step-by-step guide. Explore the code and understand the principles behind this classic cryptographic technique.
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The Vigenère Cipher is a classic encryption technique that involves shifting the letters of a plaintext by different amounts based on a keyword. Implementing this cipher in Java is a great way to understand both the fundamentals of cryptography and Java programming. Below is a simple Java code implementation of the Vigenère Cipher:

[[See Video to Reveal this Text or Code Snippet]]

In this code:

The encrypt method takes a plaintext and a key as input and returns the encrypted ciphertext.

The decrypt method takes a ciphertext and a key as input and returns the decrypted plaintext.

The main method demonstrates how to use the encrypt and decrypt methods by encrypting the plaintext "Hello World" with the key "KEY" and then decrypting the resulting ciphertext.

Feel free to experiment with different plaintexts and keys to see how the Vigenère Cipher works!