Answer:
The Data Encryption standard is used to protect electronic data. DES algorithm uses symmetric block cipher for encrypting and decrypting data. Encryption converts data into gibberish language called cipher text. Decrypting the cipher text gives us back the original data that is plaintext. is also a symmetric-key block cipher published by the National Institute of Standards and Technology (NIST). 6.1.1 History In 1973, NIST published a request for proposals for a national symmetric-key cryptosystem. A proposal from IBM, a modifi cation of a project called Lucifer, was accepted as DES.
Explanation:
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