The impact of computers increased dramatically when they were connected together through the internet. But how does information make its way across the internet, through hundreds of computers to the right destination?
In his fourth lecture Chris Bishop untangles some of the mysteries of the web. He reveals one of the most surprising results in computer science, and will show how it is used to make web pages secure.
Discover ways of scrambling information to stop eavesdroppers from reading it, and find out how quantum physics can provide us with a totally secret way to transmit data over the internet.