It’s June 23, Alan Turing’s 109th (twin with 107) birthday. One of his most well-known contributions is the design of the Bombe machine to decrypt the Enigma cipher, a cipher utilized by German troops during World War II to encrypt communications. People did not break the Enigma cipher (the improved version with a more complex plugboard), the ancestor of the computer did. And Turing was the builder. The deciphering process was not simply a battle between human intelligence, but moreover, a battle between electric devices that have the necessary computational power. To understand the foundation of the Enigma cipher, the Vigenère cipher, a typical and (in the modern sense) simplistic polyalphabetic substitution cipher, allows us to learn and dive deeper into the complicated scrambling process of the Enigma cipher. The following article elaborates the substitution in the Vigenère cipher and the Enigma cipher and further introduces Alan Turing's path to success and Marian Rejewski's contribution.