Steganography or cryptography... (1 de n)

steganos = étanche; cryptos = caché; graphos = écrit

Thus the revelations of a young woman on her way to communicate " secretly " with her fiancé would have given the idea of the first stamp to Sir Rowland Hill.

If there is an agreement on the date of 1 May 1840 as the date of issuance of the first stamp in order to fight against steganographic fraud , we must admit that, steganography and cryptography are certainly as old as the need to transmit a message.

For instance, the Greek historian Herodotus that Cicero designated as "The Father of History", already tells amazing stories in his "Histories" (also called The Investigations).

A first anecdote. The invasion of Greece by Xerxes I projects were revealed to the Greeks by a secret message from Demaratus. Demaratus (former Spartan king refuged to Xerxes I) used a writing tablet, he scratched in the wax and wrote his information message directly on the wood. He covered again the tablet with a layer of wax and the secret message could travel incognito.

Was this secret message decisive for the Greek victory ? Hard to rewrite history with ifs. The fact is that Leonidas the Spartan inflicted on the Persians lost 20,000 men at the Battle of Thermopylae and the army of Xerxes I was then defeated by Themistocles at Salamis in 480 BC. AD .

However, Xerxes I had raised an army of 5,283,220 men to carry out his project. Herodotus gives details in his Histories (Book VII, Polyhymnia). 

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