Talk:Cryptography/Archive 1

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[[Image:Lorenz-SZ42-2.jpg|thumbnail|320px|The [[Germany|German]] [[Lorenz cipher]] machine, used in [[World War II]] for encryption of very high-level general staff messages]]
[[Image:Skytala&EmptyStrip-Shaded.png|thumbnail|The Ancient Greek [[scytale]], probably much like this modern reconstruction, may have been one of the earliest devices used to implement a cipher.]]
[[Image:Nsa-enigma.jpg|240px|thumbnail|left|The [[Enigma machine]], used in several variants by the German military between the late 1920s and the end of [[World War II]], implemented a complex electro-mechanical [[cipher]] to protect sensitive communications.  [[Cryptanalysis of the Enigma|Breaking the Enigma]] cipher at Polish [[Biuro Szyfrów]], and the subsequent large-scale decryption of Enigma traffic at [[Bletchley Park]], was an important factor contributing to the Allied victory<ref name="kahnbook" />.]]
[[Image:Smartcard.JPG|thumb|250px|A credit card with [[smart card]] capabilities. Smart cards attempt to combine portability with the power to compute modern cryptographic algorithms.]]
[[Image:International Data Encryption Algorithm InfoBox Diagram.png|thumbnail|One round (out of 8.5) of the [[patent|patented]] [[International Data Encryption Algorithm|IDEA]] cipher, used in some versions of [[Pretty Good Privacy|PGP]] for high-speed encryption of, for instance, [[electronic mail|e-mail]]]]
[[Image:Diffie_and_Hellman.jpg|thumb|left|[[Whitfield Diffie]] and [[Martin Hellman]], inventors of public-key cryptography]]
[[Image:Firefox-SSL-padlock.png|thumb|161px|right|Padlock icon from the [[Firefox]] web browser, meant to indicate a page has been sent in SSL or TLS-encrypted protected form. But note that a properly subverted browser might mislead a user by displaying some similar icon when a transmission is not being protected by SSL or TLS. Security is not a straightforward issue.]] 
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Do not delete please Robert Tito | Talk 14:43, 19 February 2007 (CST)

Shannon

In his 1946 and 1948 publications made clear what cryptography should be (refs follow) Robert Tito | Talk 00:50, 21 February 2007 (CST)