How many rounds are used by DES?

The correct answer is A. 16. DES is a block encryption algorithm using 56-bit keys and 64-bit blocks that are divided in half and each character is encrypted one at a time. The characters are put through 16 rounds of transposition and substitution functions. Triple DES uses 48 rounds.

Submitted by renata2k· Apr 18, 2026Cryptography

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A
89% (17)
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5% (1)

Explanation

DES is a block encryption algorithm using 56-bit keys and 64-bit blocks that are divided in half and each character is encrypted one at a time. The characters are put through 16 rounds of transposition and substitution functions. Triple DES uses 48 rounds.

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#DES#Symmetric Encryption#Block Cipher#Rounds

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