Ciphers, Codemakers and Codebreakers : National Treasure documentary
The Ceasar cipher
The Babington plot to assassinate queen Elisabeth : Simon Singh (Documentary on the Science of Secrets).
Elisabeth's Spy Network (BBC website)
There are lots of different ways to encrypt a message, from early, simple ciphers to the famous Enigma machine. But it’s tough to make a code truly unbreakable. Hosted by: Michael Aranda SciShow
The Enigma WWII codebreaker Alan Turing (history, the imitation game,...) :
Anthony Mason visits with actor Benedict Cumberbatch to talk about his role as mathematician Alan Turing in "The Imitation Game," a new film recounting Turing's heroic (and tragic) life story.
Simon Singh : Alan Turing and the Enigma machine
The Enigma machine explained : World Science Festival (2013)
Alan Turing : Creator of modern computing : BBC website
History of the Enigma machine : Rotor machine (1915), Glowlamp Enigma (1924), Commercial Enigma (1926), Zählwerk Enigma (1928), Military Enigma (1932), Manufacturers, The Polish breakthrough (1933), WWII, Bletchey Park, The ultra secret, the Battle of the Atlantic, The Abwehr Enigma, the Japanese Enigma, Improvements,..
See this website : https://www.cryptomuseum.com/crypto/enigma/hist.htm
How Enigma machine work : diagram with a good overview ! See website : http://enigma.louisedade.co.uk/howitworks.html
Enigma and MATHS ! See this website : https://plus.maths.org/content/exploring-enigma
Public key cryptography : RSA encryption algorithm (video).
You can watch it at this adress : https://youtu.be/wXB-V_Keiu8
Cryptography in our lives : TED video from Tal Rabin, Manager and research staff member of the Cryptography Research Group at IBM's T.J. Watson
Cryptography for everyone : John Voight at TEDxUVM (he is assistant professor of mathematics and computer science).