Blockchain for Business 2019

Uses of cryptography in early times

Julius Caesar is known to have used encrypted messages to communicate with his generals. His technique was simple by today's standards; he used letters that were three positions away in the alphabet after the intended letter. For example, the letters ABC would be represented by DEF. In fact, this encryption method is widely known as the Caeser cypher.

Another famous example of the use of cryptography, which has high historical significance, was the Enigma machine invented by the German engineer Arthur Scherbius at the end of World War I. It was commercialized in the early 1920s and the German army adopted it soon after, in order to secure its military communications. The Enigma machine has nearly 159 Quintilian ...