ECSS: EC-Council Certified Security Specialist

By ECCouncil · Question Mode

QuestionQ18

VerifiedInformation Security Concepts

Ciphers are algorithms that encrypt or decrypt data. Which of the following is a symmetric-key encryption standard adopted by the U.S. government that uses a 128-bit block size and is an iterated block cipher, repeating the same defined steps multiple times?

Explanation

AES is the U.S. government’s symmetric block-cipher standard. It encrypts and decrypts 128-bit data blocks through repeated transformation rounds; AES variants differ by key size, not by the 128-bit block size.

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