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Q.

A(n) ______ is a hierarchical system that answers queries about key certification.

A

KDC

B

PKI

C

CA

D

none of the above

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________ means that a sender must not be able to deny sending a message that he sent.

A

Confidentiality

B

Integrity

C

Authentication

D

Nonrepudiation

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A witness used in entity authentication is ____________

A

something known

B

something possessed

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something inherent

D

all of the above

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3.

________ is the science and art of transforming messages to make them secure and immune to attacks.

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either (a) or (b)

D

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4.

______ is the protocol designed to create security associations, both inbound and outbound.

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B

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D

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5.

In a(n) ________, the key is called the secret key.

A

symmetric-key

B

asymmetric-key

C

either (a) or (b)

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