What is Cryptography and Why do we Need it?

A look at an evolving technology that has been changing how we communicate It was February 2009. A 560 kg satellite named Iridium 33, whirling around the planet in the low earth orbit 789 km above the Taymyr Peninsula in Serbia, met a fatal end. It clashed with the defunct 900-kg Russian satellite, Kosmos 2251. […]