Early Crypto Historical Events

A snap shot over time

Demaratus King of Sparta

GOWEST

Steganography(Hidden writing)

Greece vs Persia480 BC

GOWEST

Others: silk and wax, eggs and alum, etc.

Spartan Scytale (wood staff)

404 BCTRANSPOSITION CIPHER

SEND THE MATERIAL NOW

S E N D T HE M A T E RI A L N O W

SEIEMANALDTNTEOHRW.

Substitution Cipher

Karma-Sutra4 AD

“The art of understanding writing in cypher, and the writing of words in a peculiar way.”

Alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ

Substitution: DEFGHIJKLMNOPQRSTUVWXYZABC

“ROME SWEET ROME” “URPH VZHHW URPH”

CAESAR CIPHER (FIRST MILITARY USE OF SUBSTITUTION CIPHER)

The Vigenère Ciphercodeword: MONTREALMONTREALMOplaintext: SENDTHEMATERIALNOWciphertext: ESAWKLEXMHRKZELYAK

M

S

1523 to 1596.

Baddington PlotA life hung on a cipher

Queen Elizabeth I1533-1603Protestant

Mary Queen of Scots1542-1587Catholic

Walsingham

Mary Queen of Scots

Conspirators

Code BreakerThomas Phillipes

Cipher

ClearText

Evidence

Warning Do not rely on weak crypto

1587 - February 8th, Executed

Enigma (1917)

Museum Trip

Automaticallycombinessubstitutionandtransposition