Caption: A comparison of the American Morse Code and the International Morse Code
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 37.30 MB

Caption: Illustration of the Vigenere Table, using 'VVVRBACP' as the cipher and 'COVERCOVER' as the key, resulting in 'THANKYOU.'
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 31.62 MB

Caption: The ADFGVX cipher, employed by the German army in World War I.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 28.23 MB

Caption: During WWI, the U.S. Army Signal Corps rotated the inner ring of this cipher disk to encrypt messages in the field quickly.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 41.86 MB

Caption: A man turns a wheel generating computer codes
Artist: ImageZoo
Release: Not Applicable
File Size: 32.84 MB