* Cryptography = The science or study of the techniques of secret writing, esp. code and cipher systems, methods, and the like.

Cryptography

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Short Long History of Cryptography

1900 BC - is the 1st kwon usage of cryptography by the Egyptians (simple substitution scheme) EgiptCrypto
1 AD - Julius Cesar used the simple letter shift cipher in the Gallic Wars Msg: OMNIA GALLIA EST DIVISA IN PARTES TRES
Enc: RPQLD JDOOLD HVW GLYLVD LQ SDUWHV WUHV
300 AD - a new mathematical cryptographic scheme was used by Sun Tsu (using RNS) CRT (2,3,2)_(357)=?? (23)
1412 AD - an 14vol encyclopedia on Cryptanalysis is compiled by the Arabs ArabCrypto
In the 2nd world war the enigma rotor machine is used (substitution scheme using a continuously changing alphabet) EnigmaCrypto
In the 70’s with the development of complex electronic systems much more complex cryptographic systems have been created, such as Lucifer and DES.
Nowadays a variety of cryptographic algorithms exist an they are present in almost every day actions:
  • Accessing the internet
  • e-shopping
  • ATM machines
  • Emails
  • Buildings access
  • Pay TV
  • Anti-car theft systems
  • Private communications