Answer:
Data Encryption Standard Use Cases. The DES was a data security standard used to encrypt and decrypt non-classified computer data generated by the United States government and any commercial organization. The Data Encryption Standard (DES) is a symmetric-key block cipher published by the National Institute of Standards and Technology (NIST). ... Note that both the right section and the key are 48-bits in length. Also note that the round key is used only in this operation. The DES is a product block cipher in which 16 iterations, or rounds, of substitution and transposition (permutation) process are cascaded.
Explanation:
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