Which of the following does not use key(s)?
2025
Which of the following does not use key(s)?
Answer: B. Generation of Message Digest — Cryptographic hash functions used for message digests operate deterministically on input data without requiring any secret key parameter. In contrast,…
- A.
Symmetric Ciphers
- B.
Generation of Message Digest
- C.
Generation of Message Authentication Code
- D.
Key exchange algorithms
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Correct answer: B
Cryptographic hash functions used for message digests operate deterministically on input data without requiring any secret key parameter. In contrast, symmetric ciphers require a secret key for encryption, Message Authentication Codes (MACs) rely on keys for integrity verification, and Key Exchange algorithms involve key material. Therefore, Generation of Message Digest is the option that does not use keys.