Question 1

What are IdenTrust, Sectifo, and GoDaddy?

Accepted Answer

A)   Certificate authorities
B)   Verification authorities
C)   Digital signature authorities
D)   Message digest software suppliersE) B) and C)
F) All of the above A

Question 2

Which of the following is describes keys that are prohibitively time-consuming to crack?

Accepted Answer

A)   Strong symmetric keys
B)   40-bit keys
C)   56-bit keys
D)   112-bit 3DESsE) B) and D)
F) A) and C)

Question 3

In IPsec, the IP refers to ________, and "sec" refers to ________.

Accepted Answer

A)   Internet Protocol; security
B)   Internet Practice; symmetric
C)   Internet Protocol; symmetric
D)   intranet protocol; securityE) A) and B)
F) A) and C)

Question 4

Quantum mechanics governs ________.

Accepted Answer

A)   national security
B)   large-scale interactions
C)   small-scale interactions
D)   global security issuesE) B) and C)
F) A) and D) C

Question 5

A ________ authenticates a single message with public key encryption.

Accepted Answer

A)   public key
B)   verification
C)   digital signature
D)   message digestE) C) and D)
F) A) and B)

Question 6

SSL/TLS protection of application layer messages is transparent.

Accepted Answer

A) True 
 B)False

Question 7

What does encryption and decryption require?

Accepted Answer

A)   Plaintext and ciphertext
B)   A cipher and a key
C)   A message and a key
D)   DES and 3DESE) None of the above
F) A) and D)

Question 8

Which of the following is FALSE about public key encryption ciphers?

Accepted Answer

A)   They are extremely complex.
B)   They are slow.
C)   They are expensive to use.
D)   They are often used to encrypt very long messages for confidentiality.E) A) and B)
F) A) and D)

Question 9

A specific set of options in SSL/TLS is called a(n)  ________.

Accepted Answer

A)   DES key
B)   cipher suite
C)   RSA key
D)   symmetric keyE) A) and B)
F) A) and C)

Question 10

What is the first task in establishing a cryptographic system?

Accepted Answer

A)   For a company to invent their own custom cryptographic protections
B)   Selecting a cryptographic system standard for the dialogue
C)   Handshaking tasks are performed
D)   Verification takes placeE) All of the above
F) A) and B)

Question 11

A(n)  ________ is when an attacker intercepts messages being sent between two parties and forwards them on.

Accepted Answer

A)   replay attack
B)   security through obscurity attack
C)   evil twin attack
D)   man-in-the-middle attackE) A) and B)
F) None of the above

Question 12

Which of the following is FALSE about hashing?

Accepted Answer

A)   It is irreversible.
B)   It is repeatable.
C)   It is an important part of how cryptographic systems function.
D)   It produces ciphertext that is about as long as the plaintext that was sent.E) All of the above
F) B) and C)

Question 13

One hashing method that is archaic and was primarily used in the past is MD5.

Accepted Answer

A) True 
 B)False

Question 14

The Internet Engineering Task Force renamed ________ to the standard ________.

Accepted Answer

A)   SSL; DES
B)   DES; 3DES
C)   TLS; SSL
D)   SSL; TLSE) B) and C)
F) A) and D)

Question 15

The weakest cipher in common use today is ________.

Accepted Answer

A)   DES
B)   RC4
C)   3DES
D)   AESE) A) and D)
F) B) and D)

Question 16

Doubling the key length increases the number of possible keys by approximately double.

Accepted Answer

A) True 
 B)False

Question 17

The weakest cipher suites in a cryptographic system standard may provide no protection at all.

Accepted Answer

A) True 
 B)False

Question 18

Who designed IPsec?

Accepted Answer

A)   Netscape
B)   Microsoft
C)   IETF
D)   GoDaddyE) All of the above
F) B) and D)

Question 19

Which of the following is NOT one of the three handshaking stages of a cryptographic system standard?

Accepted Answer

A)   Negotiation
B)   Authentication
C)   Communicating
D)   KeyingE) All of the above
F) None of the above

Question 20

The second stage of a cryptographic system standard is initial authentication.

Accepted Answer

A) True 
 B)False  False

Exam 3: Cryptography

What are IdenTrust, Sectifo, and GoDaddy?

Correct AnswerverifiedA

Which of the following is describes keys that are prohibitively time-consuming to crack?

Correct AnswerverifiedShow Answer

In IPsec, the IP refers to ________, and "sec" refers to ________.

Correct AnswerverifiedShow Answer

Quantum mechanics governs ________.

Correct AnswerverifiedC

A ________ authenticates a single message with public key encryption.

Correct AnswerverifiedShow Answer

SSL/TLS protection of application layer messages is transparent.

Correct AnswerverifiedShow Answer

What does encryption and decryption require?

Correct AnswerverifiedShow Answer

Which of the following is FALSE about public key encryption ciphers?

Correct AnswerverifiedShow Answer

A specific set of options in SSL/TLS is called a(n) ________.

Correct AnswerverifiedShow Answer

What is the first task in establishing a cryptographic system?

Correct AnswerverifiedShow Answer

A(n) ________ is when an attacker intercepts messages being sent between two parties and forwards them on.

Correct AnswerverifiedShow Answer

Which of the following is FALSE about hashing?

Correct AnswerverifiedShow Answer

One hashing method that is archaic and was primarily used in the past is MD5.

Correct AnswerverifiedShow Answer

The Internet Engineering Task Force renamed ________ to the standard ________.

Correct AnswerverifiedShow Answer

The weakest cipher in common use today is ________.

Correct AnswerverifiedShow Answer

Doubling the key length increases the number of possible keys by approximately double.

Correct AnswerverifiedShow Answer

The weakest cipher suites in a cryptographic system standard may provide no protection at all.

Correct AnswerverifiedShow Answer

Who designed IPsec?

Correct AnswerverifiedShow Answer

Which of the following is NOT one of the three handshaking stages of a cryptographic system standard?

Correct AnswerverifiedShow Answer

The second stage of a cryptographic system standard is initial authentication.

Correct AnswerverifiedFalse

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A

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In IPsec, the IP refers to , and "sec" refers to .

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C

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The Internet Engineering Task Force renamed to the standard .

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False