1. Who was Alan Turing? Alan Turing played a role in deciphering the messages encrypted by the German Enigma machine. He took the lead in a team that designed a machine known as the ‘bombe’ that successfully decoded German messages. He had the idea of making a computer but Mr. Flower made the computer. . Why do we need to encrypt messages? Encryption protects our data. It protects our data when it's sitting on our computers and it protects it when it's being transmitted around the Internet. It protects our conversations, whether video, voice, or text. It protects our privacy and sometimes it protects our lives. This protection is important for everyone what do we need to do to decrypt a message? A public and private key each have a specific role when encrypting and decrypting documents. A public key may be thought of as an open safe. When a correspondent encrypts a document using a public key, that document is put in the safe, the safe shut, and the combination lock spun several times. The corresponding private key is the combination that can reopen the safe and retrieve the document. In other words, only the person who holds the private key can recover a document encrypted using the associated public key.