From the course: Learning Cryptography and Network Security

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Developing DES

Developing DES

From the course: Learning Cryptography and Network Security

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Developing DES

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The Data Encryption Standard is a symmetric encryption algorithm that was the first encryption standard adopted by the U.S. government for public use. In this segment, we'll review the development of DES from its early beginnings at IBM to its adoption as a standard by NIST in 1977. In 1973, the National Institute of Standards and Technology issued a public request for an encryption algorithm. It had to meet several criteria that included: a high level of security, be easily understood, adaptable, economical, efficient, and exportable. In 1974, IBM submitted Lucifer. Lucifer was a block cipher developed by Feistel and his colleagues. After submission, the National Security Agency evaluated Lucifer. The NSA reduced the key length from 128 bits to 56 bits and changed the inner workings. This then became the Data Encryption Standard, and it's also known as the Data Encryption Algorithm and was adopted in 1977 as the government standard for encrypting data. Now, once DES was published…

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