This is the second part of my new series on the history of cryptography. If you haven’t already, read the first part here. In Part One we looked at the earliest ciphers: simple substitutions like ...

Introduction If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message—that is, use a secret code that only you and your ...

Cryptography is the practice of study of techniques for secure communication in the presence of third parties, where we want to make sure a given message is read by the reader and the receiver ...