CRYPTOGRAPHY AND NETWORK SECURITY - MESSAGE AUTHENTICATION CODES AND KEY MANAGEMENT MCQ

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Public key encryption/decryption is not preferred because
Which one of the following is not a public key distribution means?
What is the PGP stand for?
PGP makes use of which cryptographic algorithm?
USENET is related to which of the following Public Key distribution schemes?
Which of the following public key distribution systems is most secure?
Which systems use a timestamp?
Which of these systems use timestamps as an expiration date?
Which system uses a trusted third party interface?
Publicly Available directory is more secure than which other system?
Extensions were added in which version?
The subject unique identifier of the X.509 certificates was added in which version?
Which of the following is not an element/field of the X.509 certificates?
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 –
Certificates generated by X that are the certificates of other CAs are Reverse Certificates
It is desirable to revoke a certificate before it expires because
CRL stands for
Which of the following is not a part of an Extension?
The criticality indicator indicates whether an extension can be safely ignored
“Conveys any desired X.500 directory attribute values for the subject of this certificate

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