Explore topic-wise MCQs in Cryptography and Network Security.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Cryptography and Network Security knowledge and support exam preparation. Choose a topic below to get started.

1.

“Conveys any desired X.500 directory attribute values for the subject of this certificate.”Which Extension among the following does this refer to?

A. Subject alternative name
B. Issuer Alternative name
C. Subject directory attributes
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
2.

The criticality indicator indicates whether an extension can be safely ignored.

A. True
B. False
Answer» B. False
Discussion
3.

Suppose that A has obtained a certificate from certification authority X1 and B has obtained certificate authority from CA X2. A can use a chain of certificates to obtain B’s public key. In notation of X.509, this chain is represented in the correct order as –

A. X2 X1 X1 B
B. X1 X1 X2 A
C. X1 X2 X2 B
D. X1 X2 X2 A
Answer» D. X1 X2 X2 A
Discussion
4.

THE_CRITICALITY_INDICATOR_INDICATES_WHETHER_AN_EXTENSION_CAN_BE_SAFELY_IGNORED.?$

A. True
B. False
Answer» B. False
Discussion
5.

“Conveys_any_desired_X.500_directory_attribute_values_for_the_subject_of_this_certificate.”$#

A.
B. Subject alternative name
C. Issuer Alternative name
Answer» D.
Discussion
6.

Which of the following is not a part of an Extension?

A. Extension Identifier
B. Extension value
C. Criticality Indicator
D. All of the mentioned constitute the Extension
Answer» E.
Discussion
7.

CRL stands for

A. Cipher Reusable List
B. Certificate Revocation Language
C. Certificate Revocation List
D. Certificate Resolution Language
Answer» D. Certificate Resolution Language
Discussion
8.

It is desirable to revoke a certificate before it expires because

A. the user is no longer certified by this CA
B. the CA’s certificate is assumed to be compromised
C. the user’s private key is assumed to be compromised
D. all of the mentioned
Answer» E.
Discussion
9.

Certificates generated by X that are the certificates of other CAs are Reverse Certificates.

A. True
B. False
Answer» B. False
Discussion
10.

Suppose that A has obtained a certificate from certification authority X1 and B has obtained certificate authority from CA X2. A can use a chain of certificates to obtain B’s public key. In notation of X.509, this chain is represented in the correct order as –$

A. X2 X1 X1 B
B. X1 X1 X2 A
C. X1 X2 X2 B
D. X1 X2 X2 A
Answer» D. X1 X2 X2 A
Discussion
11.

Which of the following is not an element/field of the X.509 certificates?

A. Issuer Name
B. Serial Modifier
C. Issuer unique Identifier
D. Signature
Answer» C. Issuer unique Identifier
Discussion
12.

The subject unique identifier of the X.509 certificates was added in which version?

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
13.

Extensions were added in which version?

A. 1
B. 2
C. 3
D. 4
Answer» D. 4
Discussion