How Encryption Keys Work - with Chris Bishop
What does the padlock icon on your internet browser mean and why is encryption important? In this clip from 2008 CHRISTMAS LECTURES "Hi-tech trek", Chris Bishop uses coloured water to demonstrate...
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[APPLAUSE] – If you'd like to stand there. And what's your name? – Olivia – Olivia, all right. So Olivia is going to be the internet and again Andy and I going to try to exchange keys, but this time in the electronic world. We're going to send all our information through you and you're going to try as hard as you can to steal our secret key. Alright so keys in the electronic world are really numbers, but we're going to represent numbers by colours. So each colour represents a different number. And we're going to start with the color blue. Now blue is not a secret colour, everybody knows blue. So I've got some blue, Andy's got some blue, and Olivia's got some blue. The next thing I'm going to do is I&...
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[APPLAUSE] – If you'd like to stand there. And what's your name? – Olivia – Olivia, all right. So Olivia is going to be the internet and again Andy and I going to try to exchange keys, but this time in the electronic world. We're going to send all our information through you and you're going to try as hard as you can to steal our secret key. Alright so keys in the electronic world are really numbers, but we're going to represent numbers by colours. So each colour represents a different number. And we're going to start with the color blue. Now blue is not a secret colour, everybody knows blue. So I've got some blue, Andy's got some blue, and Olivia's got some blue. The next thing I'm going to do is I&...
