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Question 740 - CISA discussion

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Which of the following is the PRIMARY reason for using a digital signature?

A.
Provide availability to the transmission
Answers
A.
Provide availability to the transmission
B.
Authenticate the sender of a message
Answers
B.
Authenticate the sender of a message
C.
Provide confidentiality to the transmission
Answers
C.
Provide confidentiality to the transmission
D.
Verify the integrity of the data and the identity of the recipient
Answers
D.
Verify the integrity of the data and the identity of the recipient
Suggested answer: B

Explanation:

A digital signature is a mathematical algorithm that validates the authenticity and integrity of a message or document by generating a unique hash of the message or document and encrypting it using the sender's private key1.The primary reason for using a digital signature is to authenticate the sender of a message, as only the sender has access to their private key and can produce a valid signature2.A digital signature also verifies the integrity of the data, as any modification to the message or document will result in a different hash value and invalidate the signature1.However, a digital signature does not provide availability or confidentiality to the transmission, as it does not prevent denial-of-service attacks or encrypt the entire message or document3.

Reference

1: Understanding Digital Signatures | CISA

2: Signature Verification | CISA

3: SECFND: Digital Signatures from Skillsoft | NICCS

asked 18/09/2024
Andre Passos
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