TheCodeBreakers
Julius
Caesar thus impressed his name permanently into cryptology.
Suetonius, the gossip columnist of ancient Rome, says that Caesar
wrote to Cicero and other friends in a cipher in which the plaintext
letters were replaced by letters standing three places further down the
alphabet, D for a, E for b, etc. Thus, the message Omnia Gallia est divisa
in partes tres would be enciphered (using the modern 26-letter alphabet)
to RPQLD JDOOLD HVW GLYLVD LQ SDUWHV WUHV. To this day, any
cipher alphabet that consists of the standard sequence, like Caesar's:
Plain a b c d e f g h I j k l m
Cipher D E F G H I J K L M N O P
Plain n o p q r s t u v w x y z
Cipher Q R S T U V W X Y Z A B O
is called a Caesar alphabet, even if it begins with a letter other than D.
It must be that as soon as a culture has reached a certain level,
probably measured largely by its literacy, cryptography appears
annaabi.ee 
