Vigenère Cipher 2.0

Vigenère Cipher by JBO Software is a straightforward, reliable tool for encrypting and decrypting text using the classic Vigenère algorithm. Designed for students, educators, and puzzle enthusiasts, it makes learning and applying polyalphabetic substitution fast and approachable. Enter your text, choose a keyword, and instantly see the corresponding ciphertext or plaintext—no cryptography background required.

Key features:

• Simple encryption and decryption using custom keywords
• Clear side-by-side input and output for quick comparisons
• Options for handling case, spaces, and punctuation
• Helpful tips that explain how the Vigenère method works
• Fast, lightweight, and easy to use for classroom demos or self-study

Whether you’re exploring historical ciphers, building better intuition for classical cryptography, or checking solutions to cipher challenges, Vigenère Cipher by JBO Software delivers a clean, focused experience that keeps the essentials front and center.

Vigenère Cipher is developed by JBO Software. The most popular versions of this product among our users are: 1.0 and 2.0. The names of program executable files are Vigenere cipher.exe, vigenere.exe.

You can check DLock, DP Multicrypt, Enigma Codebook Tool and other related programs like Crossword Twist at the "download" section.