Cryptograph means secret writing, in order to make information secret we use cipher, an algorithm that converts plain text to cipher-text. Cipher has been used long before computer existance. In 44 BC Julius Caesar uses the technique now called Caeser Cipher to send message. He used to shfit the letter by 3 character.  Another great example from history, Nazis Enigma Machine used during war to translate message. … Continue reading Basic of Cryptography – Part I