private-key cryptography

(cryptography)

As opposed to public-key cryptography, a cryptographic method in which the same key is used to encrypt and decrypt the message. Private-key algorithms include the obsolescent Data Encryption Standard (DES), triple-DES (3DES), the Advanced Encryption Standard (AES), also known as Rijndael, Blowfish, Twofish RC2, RC4, RC5 and RC6.

A problem with private-key cryptography is that the emitter and the recipient of the message must agree secretly on a common key beforehands; but how can they do so?

Public-key cryptography gives an answer to this problem.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

private-key cryptography

Typically refers to secret-key cryptography, which uses the same secret key. However, the use of the term "private" is confusing, because in public key cryptography (a different architecture), a "private key" is used. See cryptography.

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References in periodicals archive

In this book, authors Sakiyama, Sasaki, and Li present readers with a comprehensive guide to the analysis, design, and implementation of symmetric-key algorithms. The authors cover block ciphers in general, digital circuits, hardware implementations for block ciphers, side-channel analysis and fault analysis on block ciphers, cryptoanalysis on block ciphers, and many other related topics over the bookAEs seven chapters.

Security of Block Ciphers: From Algorithm Design to Hardware Implementation

Symmetric-key algorithms are a class of algorithms for cryptography that use trivially related, often identical, cryptographic keys for both a decryption and an encryption.

A study on the security algorithm for contexts in smart cities

ROSS implements two symmetric-key algorithms: the AES block cipher and Salsa20 stream cipher.

Ross: low-cost self-securing VoIP communication framework

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