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4 definitions found
 for cryptography
From The Collaborative International Dictionary of English v.0.48 :

  Cryptography \Cryp*tog"ra*phy\ (-f?), n. [Cf. F. cryptographie.]
     1. The act or art of writing in code or secret characters;
        also, secret characters, codes or ciphers, or messages
        written in a secret code.
        [1913 Webster +PJC]
  
     2. The science which studies methods for encoding messages so
        that they can be read only by a person who knows the
        secret information required for decoding, called the key;
        it includes cryptanalysis, the science of decoding
        encrypted messages without possessing the proper key, and
        has several other branches; see for example
        steganography.
        [PJC]

From WordNet (r) 3.0 (2006) :

  cryptography
      n 1: the science of analyzing and deciphering codes and ciphers
           and cryptograms [syn: cryptanalysis, cryptanalytics,
           cryptography, cryptology]
      2: act of writing in code or cipher [syn: cryptography,
         coding, secret writing, steganography]

From Moby Thesaurus II by Grady Ward, 1.0 :

  48 Moby Thesaurus words for "cryptography":
     cipher, code, coded message, coup de plume, criticism,
     cryptanalysis, cryptoanalysis, cryptoanalytics, cryptogram,
     cryptograph, cryptographer, cryptology, diagnostics, engrossment,
     epigraphy, exegetics, hermeneutics, ink spilling, inkslinging,
     inscription, invisible ink, lettering, lexicography,
     literary criticism, macrography, metoposcopy, micrography,
     oneirology, paleography, pathognomy, pen, pen-and-ink,
     pencil driving, physiognomics, physiognomy, scrivenery, scrivening,
     secret language, secret writing, semeiology, semeiotics,
     sympathetic ink, symptomatology, textual criticism, tropology,
     typewriting, typing, writing
  
  

From The Free On-line Dictionary of Computing (30 December 2018) :

  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/)">(ftp://rtfm.mit.edu/pub/usenet/news.answers/cryptography-faq/).
  
     Cryptography glossary
     http://io.com/~ritter/GLOSSARY.HTM#BruteForceAttack)">(http://io.com/~ritter/GLOSSARY.HTM#BruteForceAttack).
  
     RSA cryptography glossary
     http://rsasecurity.com/rsalabs/faq/glossary.html)">(http://rsasecurity.com/rsalabs/faq/glossary.html).
  
     Cryptography, PGP, and Your Privacy
     http://draco.centerline.com:8080/~franl/crypto.html)">(http://draco.centerline.com:8080/~franl/crypto.html).
  
     (2000-01-16)
  

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