Vigenère Table:

Vigenère CIPHER

First choose the key, then add your text or cipher.

Print the table to check the characters range below.

Use min ASCII value as 32 to include space character in your text.

Use max ASCII value as 123 to include lowercase characters in your text.

Vigenère Cipher Example

Encrypting with Vigenère Cipher

Message: HELLO
Keyword: KEYKEY
Encrypted Message: RIJVS

The encryption process involves shifting each letter in the message by the corresponding letter in the keyword. Here's a step-by-step breakdown:

1. H + K = R
2. E + E = I
3. L + Y = J
4. L + K = V
5. O + E = S

Decrypting with Vigenère Cipher

Encrypted Message: RIJVS
Keyword: KEYKEY
Decrypted Message: HELLO

The decryption process involves shifting each letter in the encrypted message back by the corresponding letter in the keyword.