Question 1

A digital ________, by itself, provides authentication.

Accepted Answer

A)  signature 
B)  certificate 
C)  Both A and B 
D)  Neither A nor B 
A)  signature 
B)  certificate 
C)  Both A and B 
D)  Neither A nor B

Question 2

When Carol sends a message to Bob, Bob will use ________ to decrypt the message.

Accepted Answer

A)  the private key 
B)  Carol's private key 
C)  Bob's private key 
D)  Carol's public key 
A)  the private key 
B)  Carol's private key 
C)  Bob's private key 
D)  Carol's public key

Question 3

A digital certificate ________.

Accepted Answer

A)  indicates that the person or firm named in the certificate is reasonably trustworthy 
B)  gives the subject's public key 
C)  Both A and B 
D)  Neither A nor B 
A)  indicates that the person or firm named in the certificate is reasonably trustworthy 
B)  gives the subject's public key 
C)  Both A and B 
D)  Neither A nor B

Question 4

HMACs provide the cryptographic protection of ________.

Accepted Answer

A)  message authentication 
B)  message integrity 
C)  Both A and B 
D)  Neither A nor B 
A)  message authentication 
B)  message integrity 
C)  Both A and B 
D)  Neither A nor B

Question 5

It is OK for a verifier to receive digital certificates from the sender.

Accepted Answer

A) True 
 B)False

Question 6

In SSL/TLS, a ________ is a specific set of security methods and options.

Accepted Answer

A)  cryptographic system standard 
B)  cipher suite 
C)  chosen set 
D)  tuple 
A)  cryptographic system standard 
B)  cipher suite 
C)  chosen set 
D)  tuple

Question 7

An attack where an adversary intercepts an encrypted message and transmits it again later is called a ________.

Accepted Answer

A)  replay attack 
B)  reflex attack 
C)  reflection attack 
D)  resend attack 
A)  replay attack 
B)  reflex attack 
C)  reflection attack 
D)  resend attack

Question 8

Quantum key distribution ________.

Accepted Answer

A)  is a way to deliver enormously long keys to communication partners 
B)  creates a major threat to many traditional cryptographic methods 
C)  Both A and B 
D)  Neither A nor B 
A)  is a way to deliver enormously long keys to communication partners 
B)  creates a major threat to many traditional cryptographic methods 
C)  Both A and B 
D)  Neither A nor B

Question 9

What is the hash size of SHA-256?

Accepted Answer

A)  112 bits 
B)  128 bits 
C)  160 bits 
D)  256 bits 
A)  112 bits 
B)  128 bits 
C)  160 bits 
D)  256 bits

Question 10

Symmetric session key exchange can be done with public key encryption.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is one of the effective key lengths in 3DES?

Accepted Answer

A)  56 bits 
B)  100 bits 
C)  112 bits 
D)  None of the above 
A)  56 bits 
B)  100 bits 
C)  112 bits 
D)  None of the above

Question 12

Which of the following statements accurately describes RC4?

Accepted Answer

A)  RC4 is extremely fast. 
B)  RC4 always uses a 40-bit key. 
C)  Both A and B 
D)  Neither A nor B 
A)  RC4 is extremely fast. 
B)  RC4 always uses a 40-bit key. 
C)  Both A and B 
D)  Neither A nor B

Question 13

________ is efficient enough in processing power and RAM requirements to be used on small devices, such as PDAs and cell phones.

Accepted Answer

A)  3DES 
B)  AES 
C)  Both A and B 
D)  Neither A nor B 
A)  3DES 
B)  AES 
C)  Both A and B 
D)  Neither A nor B

Question 14

SSL/TLS was developed for ________ VPNs.

Accepted Answer

A)  host-to-host 
B)  site-to-site 
C)  Both A and B 
D)  Neither A nor B 
A)  host-to-host 
B)  site-to-site 
C)  Both A and B 
D)  Neither A nor B

Question 15

The supplicant creates a message digest by ________.

Accepted Answer

A)  adding the password to the challenge message and hashing the two 
B)  hashing the plaintext message 
C)  encrypting the message digest with its own private key 
D)  None of the above. 
A)  adding the password to the challenge message and hashing the two 
B)  hashing the plaintext message 
C)  encrypting the message digest with its own private key 
D)  None of the above.

Question 16

To ensure that a digital certificate is valid, the receiver of the certificate must check ________.

Accepted Answer

A)  the digital signature 
B)  the valid period 
C)  Both A and B 
D)  Neither A nor B 
A)  the digital signature 
B)  the valid period 
C)  Both A and B 
D)  Neither A nor B

Question 17

For message-by-message authentication, each message must contain an electronic signature.

Accepted Answer

A) True 
 B)False

Question 18

In public key encryption for authentication, the receiver decrypts with the public key of the sender.

Accepted Answer

A) True 
 B)False

Question 19

SSL/TLS is used for ________ VPNs.

Accepted Answer

A)  host-to-host 
B)  remote access 
C)  Both A and B 
D)  Neither A nor B 
A)  host-to-host 
B)  remote access 
C)  Both A and B 
D)  Neither A nor B

Question 20

In mutual authentication between two parties, ________.

Accepted Answer

A)  there are two verifiers and two supplicants 
B)  there are two verifiers, but there is only one supplicant 
C)  there is one verifier, but there are two supplicants 
D)  None of the above. 
A)  there are two verifiers and two supplicants 
B)  there are two verifiers, but there is only one supplicant 
C)  there is one verifier, but there are two supplicants 
D)  None of the above.

A digital ________, by itself, provides authentication.

When Carol sends a message to Bob, Bob will use ________ to decrypt the message.

A digital certificate ________.

HMACs provide the cryptographic protection of ________.

It is OK for a verifier to receive digital certificates from the sender.

In SSL/TLS, a ________ is a specific set of security methods and options.

An attack where an adversary intercepts an encrypted message and transmits it again later is called a ________.

Quantum key distribution ________.

What is the hash size of SHA-256?

Symmetric session key exchange can be done with public key encryption.

Which of the following is one of the effective key lengths in 3DES?

Which of the following statements accurately describes RC4?

________ is efficient enough in processing power and RAM requirements to be used on small devices, such as PDAs and cell phones.

SSL/TLS was developed for ________ VPNs.

The supplicant creates a message digest by ________.

To ensure that a digital certificate is valid, the receiver of the certificate must check ________.

For message-by-message authentication, each message must contain an electronic signature.

In public key encryption for authentication, the receiver decrypts with the public key of the sender.

SSL/TLS is used for ________ VPNs.

In mutual authentication between two parties, ________.

The Threat Environment

Planning and Policy

Secure Networks

Access Control

Firewalls

Host Hardening

Application Security

Data Protection

Incident and Disaster Response

Module A: Networking Concepts

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Exam 3: Cryptography

A digital ________, by itself, provides authentication.

When Carol sends a message to Bob, Bob will use ________ to decrypt the message.

A digital certificate ________.

HMACs provide the cryptographic protection of ________.

It is OK for a verifier to receive digital certificates from the sender.

In SSL/TLS, a ________ is a specific set of security methods and options.

An attack where an adversary intercepts an encrypted message and transmits it again later is called a ________.

Quantum key distribution ________.

What is the hash size of SHA-256?

Symmetric session key exchange can be done with public key encryption.

Which of the following is one of the effective key lengths in 3DES?

Which of the following statements accurately describes RC4?

________ is efficient enough in processing power and RAM requirements to be used on small devices, such as PDAs and cell phones.

SSL/TLS was developed for ________ VPNs.

The supplicant creates a message digest by ________.

To ensure that a digital certificate is valid, the receiver of the certificate must check ________.

For message-by-message authentication, each message must contain an electronic signature.

In public key encryption for authentication, the receiver decrypts with the public key of the sender.

SSL/TLS is used for ________ VPNs.

In mutual authentication between two parties, ________.

The Threat Environment

Planning and Policy

Secure Networks

Access Control

Firewalls

Host Hardening

Application Security

Data Protection

Incident and Disaster Response

Module A: Networking Concepts

Filters