Almost 20 years ago, Whit Diffie predicted that the public-key cryptography being widely used at the time would be strong enough for generations to come. In an article, "The First Ten Years of Public ...

Every online bank transfer, private message and Bitcoin transaction rests on the assumption that some math problems are ...

For thousands of years, if you wanted to send a secret message, there was basically one way to do it. You’d scramble the message using a special rule, known only to you and your intended audience.