Interesting introduction and does a good job of explaining what has been discovered.

Instead of hiring "upper-class twits from Oxford and Cambridge," A government communications agency tried a new angle on recruiting hackers. They decided to combat hackers with other experienced hackers by posting an online puzzle and offering a job interview to those who solved it.

Very interesting article that begins with the story of Mary, Queen of Scots, and continues to speak about different techniques of encryption that are harder and harder to break. It also deals with the fact that Mary's messages were being intercepted and the article speaks about secure encryption using photons where you would know if your message was intercepted.