SCP Exam SC0-501 Topic 2 Question 89 Discussion

Actual exam question for SCP's SC0-501 exam

Question #: 89
Topic #: 2

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

AThis 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.

BThis extension contains a hash of the subject's This allows a user to decrypt the subject'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 subject can be validated.

CThis 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.

DThis extension has a hash of the issue'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 CA can be validated.

Show Suggested Answer

Suggested Answer: D

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

Limited Time Offer

25%

Off

Get Premium SC0-501 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Laurene

8 months ago

Option D makes no sense. The SubjectKeyIdentifier has nothing to do with the issuer's public key.

upvoted 0 times

...

Candida

8 months ago

Ha! Option A is just plain silly. Decrypting the private key using the public key? That's not how it works!

upvoted 0 times

Paulina

7 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.

upvoted 0 times

...

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.

upvoted 0 times

...

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?

upvoted 0 times

Thaddeus

8 months ago

Thanks for clarifying. I was also confused about that.

upvoted 0 times

...

Carman

8 months ago

Option A is correct. The SubjectKeyldentifier contains a hash of the end entity's private key, not the subject's private key.

upvoted 0 times

...

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.

upvoted 0 times

Barb

8 months ago

I agree. It's an important extension in a digital certificate for verifying the subject's identity.

upvoted 0 times

...

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.

upvoted 0 times

...

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.

upvoted 0 times

...

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.

upvoted 0 times

Carman

8 months ago

Definitely, being able to match the hash value of the public key for validation purposes is key in X.509v3 certificates.

upvoted 0 times

...

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.

upvoted 0 times

...

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.

upvoted 0 times

...

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.

upvoted 0 times

...

Ona

9 months ago

I think the purpose of the SubjectKeyldentifier is to validate the end entity's private key.

upvoted 0 times

...