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SCP Exam SC0-501 Topic 2 Question 89 Discussion

Actual exam question for SCP's SC0-501 exam
Question #: 89
Topic #: 2
[All SC0-501 Questions]

One important X.509v3 extension in a digital certificte is the SubjectKeyldentifier. What is the purpose of this field?

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Suggested Answer: D

by Carlee at Jun 01, 2024, 08:09 AM

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Laurene
7 months ago
Option D makes no sense. The SubjectKeyIdentifier has nothing to do with the issuer's public key.
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Candida
7 months ago
Ha! Option A is just plain silly. Decrypting the private key using the public key? That's not how it works!
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Paulina
6 months ago
Option C) This extension has a hash of the subject's public key. This allows a user to calculate the hash value of the public key on the certificate to look for a match. If the calculation matches the SubjectKeyldentifier value, then the subject can be validated.
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Raul
7 months ago
Option A) This extension contains a hash of the end entity's private key. This allows a user to decrypt the end entity's private key using the publisheed public key and recalulate the hash value of the private key on the certificate to look for a match. If the calculation matches the SubjectKeyldentifier value, then the end entity can be validated.
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Burma
8 months ago
I'm not sure about this one. Option B seems a bit strange - why would the subject's private key be published?
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Thaddeus
7 months ago
Thanks for clarifying. I was also confused about that.
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Carman
7 months ago
Option A is correct. The SubjectKeyldentifier contains a hash of the end entity's private key, not the subject's private key.
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Louvenia
8 months ago
I'm leaning towards Option C as well. The hash of the subject's public key is a common way to uniquely identify the certificate holder.
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Barb
7 months ago
I agree. It's an important extension in a digital certificate for verifying the subject's identity.
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Essie
8 months ago
Yes, that's right. It allows a user to calculate the hash value of the public key on the certificate for validation.
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Buffy
8 months ago
I think Option C is correct. The hash of the subject's public key is used to uniquely identify the certificate holder.
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Gilberto
8 months ago
Option C seems to be the most logical answer. The SubjectKeyIdentifier should contain a hash of the subject's public key, which can be used to validate the identity of the certificate holder.
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Carman
7 months ago
Definitely, being able to match the hash value of the public key for validation purposes is key in X.509v3 certificates.
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Evan
8 months ago
Yes, having the hash of the subject's public key in the SubjectKeyIdentifier extension is crucial for validating the certificate holder.
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Marylin
8 months ago
I agree, option C makes the most sense. It's important to have a way to validate the subject's public key.
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Shawana
8 months ago
I agree with you, Ona. Option A seems to be the correct answer because it mentions the end entity's private key.
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Ona
8 months ago
I think the purpose of the SubjectKeyldentifier is to validate the end entity's private key.
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