Popular Science: The Concept of Cryptography is Actually Easier to Understand Than You Think!

One of the most famous uses of cryptography is Caesar’s cipher, developed by Julius Caesar around 40 BC. It is a method of encrypting English letters, which renders an English text unreadable to outsiders, as Caesar’s cipher appears as a simple jumble of characters to them. In reality, Julius Caesar simply shifted each letter in the alphabet by a certain number of positions, replacing each letter with the letter that comes a few positions after or before it in the alphabet. For example, shifting the alphabet five positions to the right means that the letter “A” represents “F” and “B” represents “G”. Therefore, when transmitting messages, there is a reduced concern of interception, as only those who know the encryption rule can understand how to decipher the message.