Cryptography is, traditionally, the study of ways to convert information from its normal, comprehensible form into an obscured guise, unreadable without special knowledge — the practice of encryption. In the past, cryptography helped ensure secrecy in important communications, such as those of spies, military leaders, and diplomats. In recent decades, the field of cryptography has expanded its remit. Examples include:

• providing mechanisms for more than just keeping secrets: schemes like digital signatures and digital cash, or intellectual property protection, for example.
• protection of routine transmission of data across publicly accessible channels. Cryptography has come to be in widespread use by many civilians who may not have extraordinary needs for secrecy (at least by governmental standards).

Cryptography has come to be often transparently built into the infrastructure for computing and telecommunications; users may not even be aware of it in some cases.

See also: List of cryptography topics

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Subcategories

There are 12 subcategories to this category.

Authentication methods C Cryptographers Cryptographic algorithms Cryptographic attacks

C cont. Cryptographic hardware Cryptographic protocols Cryptographic software Cryptography standards Cryptography stubs

D Digital rights management H Historical events in cryptography O Organizations in cryptography

Articles in category "Cryptography"

There are 188 articles in this category.

40-bit encryption A ABA digital signature guidelines Advanced Access Content System Advanced Encryption Standard process Anonymous publication Anonymous remailer Authentication Authorization certificate Avalanche effect B BCH code Baconian cipher Beaumanor Hall Bigram Black Chamber Blind credential Blind signature Blinding (cryptography) Block size (cryptography) Books on cryptography Boolean function Burrows-Abadi-Needham logic Bypassing Internet censorship C CMVP CRYPTO CRYPTREC Certificate authority Certificate revocation list Certificate-based encryption Certificateless cryptography Cipherspace Cleartext Code (cryptography) Code talker Code word Codebook The Codebreakers Codress message Commitment scheme Communication Theory of Secrecy Systems Communications security Computer insecurity Computer surveillance Confidentiality Confusion and diffusion Content-scrambling system Cover (telecommunications) Crib Cryptanalysis of the Enigma Crypto-anarchism Crypto-society Crypto: How the Code Rebels Beat the Government Saving Privacy in the Digital Age Cryptochannel Cryptogram Cryptographic engineering Cryptographic hash function Cryptographically secure pseudo-random number generator Cryptographically strong Cryptographie indéchiffrable Cryptography Cryptography in Japan Cryptography newsgroups Cryptography standards

C cont. Cryptologia Cryptology ePrint Archive Cryptome Cryptonomicon Cryptosystem Cypherpunk D DES supplementary material Decipherment Decisional Diffie-Hellman assumption Decrypt Decryption matrix Deniable encryption Digital Fortress Digital reputation Digital rights management Digital signature Digital timestamping Diplomatic bag Direct anonymous attestation Discrete logarithm DomainKeys Dual basis in a field extension E ECHELON ECRYPT EKMS Edward Travis Electronic signature Elliptic curve cryptography Encryption Enigma machine Entrust Existential forgery Export of cryptography F FIPS 140-2 Fermat primality test Financial cryptography Fortuna (PRNG) Frequency analysis Frequency-hopping spread spectrum Friend-to-friend Full disclosure G Garble Gardening (cryptanalysis) The Gold Bug H HMAC Hard-core predicate History of cryptography Host Identity Protocol Hushmail I ID-based cryptography Identification friend or foe Illegal prime Index of coincidence Information leakage Information theoretic security Initialization vector J JN-25 Journal of Cryptology K Kerckhoffs' law Key (cryptography) Key authentication Key derivation function Key distribution center

K cont. Key escrow Key generation Key management Key schedule Key server Key signature (cryptography) Key signing party Key size Key space Keygen Keysigning Knapsack problem L LEAP (encryption) Le chiffre indéchiffrable Linear feedback shift register Link encryption List of coding terms List of cryptographic key types List of cryptography topics List of open problems in computer science List of telecommunications encryption terms M Magic (cryptography) Malleability Mean Shortest Distance Message authentication code Miller-Rabin primality test Mirror writing Modular exponentiation N NESSIE NSA encryption systems NSAKEY Normal basis Null Null cipher Numbers station O OTFE One-time pad One-way function Optimal Asymmetric Encryption Padding P PBKDF2 PKCS PKIX Padding (cryptography) Passphrase Password Penet remailer Physical security Plaintext Polynomial basis Primality test Probabilistic encryption Proof-of-work system Provable security Pseudo-Hadamard transform Pseudonymity Pseudoprime Pseudorandom noise Public key certificate Public key infrastructure Public-key cryptography Q Quadratic residuosity problem Quantum computer Quantum cryptography