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Leone Battista Alberti Invented the first mechanical cypher machine the "Alberti Cypher"
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Bellaso Invented the reciprocal table at a time when cryptographic writings were well revered in the Italian courts.
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Sir Francis Walsingham used cryptoanalysis to implicate Mary Queen of Scots of attempted murder of Queen Elizabeth I.
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This cypher disk was recreated over one hundered years after by Etienne Bazeries and was used as a tactical cypher for the US Army.
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Done for the English in the Crimean War created by Babbage to crack the polyaphabetic cypher.
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Wheatstone invents the Playfair cipher.
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The interception and decryption of the Zimmerman Telegram thrust US entry into World War I
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Created by Gilbert Vernam now known as the stream cipher, and to later be used to help create the one-time pad
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Hebern invented and then patented the first rotor machine design.
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The first break into the unbreakable German Enigma Machine took place in Poland by Rejewski.
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Surprise Pearl Harbor attack despite US decryption of several Japanese communications
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The designer of the Pearl Harbor attack was assassinated because of intercepted itinerary from a decrypted message
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DIffie and Hellman publish New Directions in Cryptography article forming the framework for many encryption algorithms used today
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RSA invented at MIT a new form of public key encryption still in use today.
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Published because of flaw found in the SHA0 algorithm successors to this algorithm still prevalent today..