Warning* this Vigenère cipher I have implemented is susceptible to cryptanalysis attacks! The logic of this cipher was initially designed by Giovan Bellaso in the 16th century. Though it is simple and convenient , it should NOT be used as the primary method to secure sensitive data. Instead, you should use my AES encryption which is infeasible to crack.

Key (case sensitive/letters only/any length):  

Plaintext

Ciphertext