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SECURITY
We’ve asked encryption guru Simon Singh to write an article on encryption, from the early days to today. Simon, you may remember, was the presenter of The Science of Secrecy, which was a 5 part series bringing to life the hidden history of codes and code breaking. He also wrote the accompanying book, The Science of Secrecy, which was his second book on cryptography, the first being the ground-breaking The Code Book.

So take a look at Simon’s article A Brief History of the Science of Secrecy, where he explains the ins and outs of ciphers. If monoalphabetic and polyalphabetic ciphers are all a bit much for you, take a look at our Encryption Unravelled , an interactive journey through various methods of cryptography, from the Caesar Cipher through to public key cryptography. Learn along with us as we outline how Alice and Bob can sneak a message past the ever-watchful Eve.

What is encryption? Whitfield Diffie, inventor of public key encryption, explains.
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OU Course
TU170 Learning Online: Computing with Confidence