Transmissions through time: the 2017 advent calendar
Day 7

Encryption keys

Chris Bishop demonstrates how encryption keys work on the internet.

What does the padlock icon on your internet browser mean and why is encryption important? In this video Chris Bishop uses coloured water to demonstrate how information is exchanged and kept secure on the internet.

Chris Bishop gave the 2008 CHRISTMAS LECTURES "High-tech trek". This clip is from his fourth lecture "Untangling the web".