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The Data Encryption Standard (DES / ˌ d iː ˌ iː ˈ ɛ s, d ɛ z /) is a symmetric-key algorithm for the encryption of digital data. Although its short key length of 56 bits makes it too insecure for modern applications, it has been highly influential in the advancement of cryptography .
The Data Encryption Standard was a catalyst for further innovation in cryptography. Although now outdated, the idea behind DES was to create a government standard of encryption for unclassified or ...
FIPS PUB 31 Guidelines for Automatic Data Processing Physical Security and Risk Management 1974; FIPS PUB 46-3 Data Encryption Standard 1999; FIPS PUB 73 Guidelines for Security of Computer Applications 1980; FIPS PUB 74 Guidelines for Implementing and Using the NBS Data Encryption Standard 1981; FIPS PUB 81 DES Modes of Operation 1980
The Data Encryption Standard (DES) and the Advanced Encryption Standard (AES) are block cipher designs that have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted). [44]
This article details the various tables referenced in the Data Encryption Standard (DES) block cipher. All bits and bytes are arranged in big endian order in this document. That is, bit number 1 is always the most significant bit.
Because asymmetric key algorithms are nearly always much more computationally intensive than symmetric ones, it is common to use a public/private asymmetric key-exchange algorithm to encrypt and exchange a symmetric key, which is then used by symmetric-key cryptography to transmit data using the now-shared symmetric key for a symmetric key ...
It supersedes the Data Encryption Standard (DES), [9] which was published in 1977. The algorithm described by AES is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data. In the United States, AES was announced by the NIST as U.S. FIPS PUB 197 (FIPS 197) on November 26, 2001. [6]
For example, the Computer Security Institute reported that in 2007, 71% of companies surveyed used encryption for some of their data in transit, and 53% used encryption for some of their data in storage. [20] Encryption can be used to protect data "at rest", such as information stored on computers and storage devices (e.g. USB flash drives). In ...