Media Contributed by Rick
Caesar cipher diagram The action of a Caesar cipher is to replace each plaintext letter with a different one a fixed number of places down the alphabet. The cipher illustrated here uses a left shift of three, so that (for example) each occurrence of E in the plaintext becomes B in the ciphertext.
Suetonius, De vita Caesarum Berlin State Library (Ms. lat. fol. 28, fol. 73v.)
Caesar cipher mechanism A construction of two rotating disks with a Caesar cipher can be used to encrypt or decrypt the code
front cover of Casino Royale by Ian Fleming Down the left and right sides are representations of hearts, four on each side, each one with a drop of blood below them. In the centre of the image is another heart but without the blood drop. This central heart is surrounded by a gold laurel leaf bearing the words "A whisper of Love, A Whisper of Hate". Above the heart / laurel is the title, Casino Royale; below the heart / laurel are the words "by Ian Fleming"
