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 WORLD-INFOSTRUCTURE > CRYPTOGRAPHY > SOME ESSENTIAL DEFINITIONS
  some essential definitions


some essential definitions in the field of cryptography are:
- cryptoanalysis
- cryptology
- ciphers

"Few false ideas have more firmly gripped the minds of so many intelligent men than the one that, if they just tried, they could invent a cipher that no one could break." (David Kahn)

codes
plaintext
ciphertext
to encipher/encode
to decipher/decode

The variants of encryption systems are endless.
For deciphering there exists always the same game of trial and error (first guessing the encryption method, then the code). A help to do so is pruning. Once, after a more or less long or short period a code/cipher breaks. Monoalphabetic ciphers can be broken easily and of course are no longer used today but for games.

for further information on codes and ciphers etc. see:
http://www.optonline.com/comptons/ceo/01004A.html
http://www.ridex.co.uk/cryptology/#_Toc439908851




browse Report:
Cryptography
    Abstract
 ...
-3   Timeline 1970-2000 AD
-2   Cryptography's Terms and background
-1   So what does cryptography mean?
0   some essential definitions
+1   Key-Systems
+2   Asymmetric or Public-Key-Cryptosystems
+3   Steganography
     ...
Epilogue
 INDEX CARD     RESEARCH MATRIX 
United Brands Company
American corporation formed in 1970 in the merger of United Fruit Company and AMK Corporation. United Fruit Company, the main company, was founded in 1899 producing and marketing bananas grown in the Caribbean islands, Central America, and Colombia. The principal founder was Minor C. Keith, who had begun to acquire banana plantations and to build a railroad in Costa Rica as early as 1872. In 1884 he contracted with the Costa Rican government to fund the national debt and to lay about 50 more miles of track. In return he received, for 99 years, full rights to these rail lines and 800,000 acres of virgin land, tax exempt for 20 years. By 1930 it had absorbed 20 rival firms and became the largest employer in Central America. As a foreign corporation of conspicuous size, United Fruit sometimes became the target of popular attacks. The Latin-American press often referred to it as el pulpo ("the octopus"), accusing it of exploiting labourers, bribing officials, and influencing governments during the period of Yankee "dollar diplomacy" in the first decades of the 20th century.