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Question 357 - CAS-004 discussion

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A new requirement for legislators has forced a government security team to develop a validation process to verify the integrity of a downloaded file and the sender of the file Which of the following is the BEST way for the security team to comply with this requirement?

A.
Digital signature
Answers
A.
Digital signature
B.
Message hash
Answers
B.
Message hash
C.
Message digest
Answers
C.
Message digest
D.
Message authentication code
Answers
D.
Message authentication code
Suggested answer: A

Explanation:

A digital signature is a cryptographic technique that allows the sender of a file to sign it with their private key and the receiver to verify it with the sender’s public key. This ensures the integrity and authenticity of the file, as well as the non-repudiation of the sender. A message hash or a message digest is a one-way function that produces a fixed-length output from an input, but it does not provide any information about the sender. A message authentication code (MAC) is a symmetric-key technique that allows both the sender and the receiver to generate and verify a code using a shared secret key, but it does not provide non-repudiation. Reference: [CompTIA Advanced Security

Practitioner (CASP+) Certification Exam Objectives], Domain 2: Enterprise Security Architecture, Objective 2.1: Apply cryptographic techniques

asked 02/10/2024
tirou RANGA
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