Early Crypto Historical Events

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Early Crypto Historical Events

• A snap shot over time

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Demaratus King of Sparta
Greece vs Persia 480 BC
GO WEST
GO WEST
Steganography (Hidden writing)
Others silk and wax, eggs and alum, etc.
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Spartan Scytale (wood staff) 404 BC
TRANSPOSITION CIPHER
SEND THE MATERIAL NOW
S E N D T H E M A T E R I A L N O W
SEIEMANALDTNTEOHRW.
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Substitution Cipher
Karma-Sutra 4 AD
The art of understanding writing in cypher, and
the writing of words in a peculiar way.
CAESAR CIPHER (FIRST MILITARY USE OF
SUBSTITUTION CIPHER)
Alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ Substi
tution DEFGHIJKLMNOPQRSTUVWXYZABC
URPH VZHHW URPH
ROME SWEET ROME
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The Vigenère Cipher
1523 to 1596.
codeword MONTREALMONTREALMO plaintext
SENDTHEMATERIALNOW ciphertext
ESAWKLEXMHRKZELYAK
S
M
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Baddington PlotA life hung on a cipher
Mary Queen of Scots 1542-1587 Catholic
Queen Elizabeth I 1533-1603 Protestant
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Clear Text
Code Breaker Thomas Phillipes
Cipher
Evidence
Conspirators
Mary Queen of Scots
Walsingham
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Warning Do not rely on weak crypto
1587 - February 8th, Executed
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Enigma (1917)
Automatically combines substitution and transposit
ion
Museum Trip