Today, 100 years ago, Alan Turin was born, and Google are celebrating that fact with a special doodle.
The doodle is a representation of the Turin machine, which manipulates symbols on a strip of tape according to a table of rules and was developed in 1936.
Turin was perhaps best known for his involvement in cracking the German’s Enigma codes in World War 2.
Back in 2008 at the RSA Security Conference there was an Enigma machine on display.
Turin committed suicide in 1944.