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ISC2 ISSAP Exam - Topic 4 Question 119 Discussion

A digital signature is a type of public key cryptography. Which of the following statements are true about digital signatures? Each correct answer represents a complete solution. Choose all that apply.
C) In order to digitally sign an electronic record, a person must use his/her private key. and D) In order to verify a digital signature, the signer's public key must be used.
A) In order to digitally sign an electronic record, a person must use his/her public key.
B) In order to verify a digital signature, the signer's private key must be used.

ISC2 ISSAP Exam - Topic 4 Question 119 Discussion

Actual exam question for ISC2's ISSAP exam
Question #: 119
Topic #: 4
[All ISSAP Questions]

A digital signature is a type of public key cryptography. Which of the following statements are true about digital signatures? Each correct answer represents a complete solution. Choose all that apply.

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Suggested Answer: C, D

by Cathrine at Jun 27, 2026, 10:05 AM

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Yen
2 hours ago
I’m confused about B. I thought the private key was used for signing, not for verification. So I’m not sure if that one is correct.
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Karan
5 days ago
I practiced a question similar to this, and I believe D is definitely true. You need the public key to verify a digital signature.
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Quentin
10 days ago
I'm a bit unsure about A. It sounds wrong because I feel like the public key is used for verification, not signing.
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Tegan
16 days ago
I think I remember that to sign something digitally, you actually use your private key, not the public key. So C should be correct.
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