The Data Encryption Standard or DES was once a predominant symmetric-key Cipher algorithm for the encryption of electronic data.

DES was highly influential in the advancement of modern Cryptography in the academic world.

Developed in the early 1970s at IBM and based on an earlier design by Horst Feistel, the Cipher was submitted to the National Bureau of Standards (NBS) following the agency's invitation to propose a candidate for the protection of sensitive, unclassified electronic government data.

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