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cryptography


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Cryptography  \Cryp*tog"ra*phy\  (-f?),  n.  [Cf.  F.  cryptographie.] 
  The  act  or  art  of  writing  in  secret  characters;  also  secret 
  characters,  or  cipher. 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  cryptography 
 
    The  practise  and  study  of  {encryption}  and 
  {decryption}  -  encoding  data  so  that  it  can  only  be  decoded  by 
  specific  individuals.  A  system  for  encrypting  and  decrypting 
  data  is  a  cryptosystem  These  usually  involve  an  {algorithm} 
  for  combining  the  original  data  ("{plaintext}")  with  one  or 
  more  keys"  -  numbers  or  strings  of  characters  known  only  to 
  the  sender  and/or  recipient.  The  resulting  output  is  known  as 
  "{ciphertext}". 
 
  The  security  of  a  cryptosystem  usually  depends  on  the  secrecy 
  of  (some  of)  the  keys  rather  than  with  the  supposed  secrecy  of 
  the  {algorithm}.  A  strong  cryptosystem  has  a  large  range  of 
  possible  keys  so  that  it  is  not  possible  to  just  try  all 
  possible  keys  (a  "{brute  force}"  approach).  A  strong 
  cryptosystem  will  produce  ciphertext  which  appears  random  to 
  all  standard  statistical  tests.  A  strong  cryptosystem  will 
  resist  all  known  previous  methods  for  breaking  codes 
  ("{cryptanalysis}"). 
 
  See  also  {cryptology},  {public-key  encryption},  {RSA}. 
 
  {Usenet}  newsgroups:  {news:sci.crypt}, 
  {news:sci.crypt.research}. 
 
  {FAQ}  {MIT 
  (ftp://rtfm.mit.edu/pub/usenet/news.answers/cryptography-faq/)}. 
 
  {Cryptography  glossary 
  (http://www.io.com/~ritter/GLOSSARY.HTM#BruteForceAttack)}. 
 
  {RSA  cryptography  glossary 
  (http://www.rsasecurity.com/rsalabs/faq/glossary.html)}. 
 
  {Cryptography,  PGP,  and  Your  Privacy 
  (http://draco.centerline.com:8080/~franl/crypto.html)}. 
 
  (2000-01-16) 
 
 




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