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cryptography    
n. 密码使用法,密码

密码使用法,密码

cryptography
密码术

cryptography
密码学

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

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]

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

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://io.com/~ritter/GLOSSARY.HTM#BruteForceAttack)}.

{RSA cryptography glossary
(http://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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  • Cryptography - Wikipedia
    Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία-logia, "study", respectively [1]), is the practice and study of techniques for secure communication in the presence of adversarial behavior [2]
  • Cryptography and its Types - GeeksforGeeks
    Cryptography is a technique of securing information and communications using codes to ensure confidentiality, integrity and authentication Thus, preventing unauthorized access to information The prefix "crypt" means "hidden" and the suffix "graphy" means "writing"
  • What Is Cryptography? - IBM
    Derived from the Greek word “kryptos,” meaning hidden, cryptography literally translates to “hidden writing ” It can be used to obscure any form of digital communication, including text, images, video or audio
  • What is Cryptography? Definition, Importance, Types - Fortinet
    Cryptography is the process of hiding or coding information so that only the person a message was intended for can read it The art of cryptography has been used to code messages for thousands of years and continues to be used in bank cards, computer passwords, and ecommerce
  • What is cryptography? How algorithms keep information secret and safe
    Cryptography is the art of keeping information secret and safe by transforming it into form that unintended recipients cannot understand It makes secure data transmission over the internet
  • ISO - What is cryptography?
    How cryptography keeps communication secret and safe The cryptographic process of scrambling text from a readable form to an unintelligible form – known as cipher text – is called encryption Sending secret or private messages as cipher text is a typical use of cryptography
  • Cryptography | NIST - National Institute of Standards and Technology
    Cryptography uses mathematical techniques to transform data and prevent it from being read or tampered with by unauthorized parties That enables exchanging secure messages even in the presence of adversaries
  • What Is Cryptography? Algorithms, Types, Tools Applications Explained
    Cryptography is the science of securing data by converting it into unreadable formats (encryption) and transforming it back (decryption) using mathematical algorithms and secret keys It prevents unauthorized access, tampering, and eavesdropping In simple terms:
  • What is Cryptography? A Complete Guide - The Knowledge Academy
    Cryptography is the practice of safeguarding information and communications by converting data into a coded format that only authorised individuals can decipher This process relies on a range of algorithms and protocols to ensure that sensitive information remains secure from unauthorised access
  • What Is Cryptography and How Does It Work? - How-To Geek
    Cryptology is the broader term that encompasses both In simple terms, cryptography deals with creating encryption and decryption methods, while cryptanalysis focuses on understanding how to overcome those methods Cryptography comes in different flavors, each with its own purpose and personality





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