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Tuesday, 13 May 2014

Code

The earliest known use of cryptography is found in non-standard hieroglyphs carved into monuments from the Old Kingdom of Egypt circa 1900 BC.

Ahmad al-Qalqashandi (1355–1418) wrote the Subh al-a 'sha, a 14-volume encyclopedia which included a section on cryptology. The list of ciphers in this work included both substitution and transposition, and for the first time, a cipher with multiple substitutions for each plaintext letter.

Binary code was invented in 1679.

The Vigenère Cipher, invented in 1553 and using various alphabets, was not cracked until 1854 by British computer pioneer Charles Babbage. No other code has taken as long to crack.

During the Second World War, Bletchley Park was the site of the United Kingdom's main decryption establishment, where ciphers and codes of several Axis countries were decrypted, most importantly the ciphers generated by the German Enigma and Lorenz machines.

For the many members of the Women's Royal Naval Service (Wrens) who worked at Bletchley Park, their posting was to HMS Pembroke V.

Cryptography is the art of writing or solving coded writing.

Source Wikipedia

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