Question 1

Substitution is also referred to as permutation.

Accepted Answer

A) True 
 B)False

Question 2

Julius Caesar created the scytale cipher.

Accepted Answer

A) True 
 B)False

Question 3

The Caesar cipher and the Vigenere cipher are two of the earliest forms of substitution ciphers.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is NOT a symmetric algorithm?

Accepted Answer

A)   CAST
B)   IDEA
C)   RSA
D)   TwofishE) C) and D)
F) A) and C)

Question 5

A key is a parameter that controls the transformation of plaintext into ciphertext or vice versa.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is NOT an e-mail standard?

Accepted Answer

A)   MIME
B)   S/MIME
C)   IPsec
D)   PGPE) A) and D)
F) A) and C)

Question 7

What is another term for a null cipher?

Accepted Answer

A)   Concealment cipher
B)   Substitution cipher
C)   Running key cipher
D)   Transposition cipherE) A) and D)
F) B) and D)

Question 8

Which hash function produces 128-, 160-, or 192-bit hash values after performing 24 rounds of computations on 512-bit blocks?

Accepted Answer

A)   Tiger
B)   HAVAL
C)   SHA-2
D)   MACE) A) and B)
F) B) and C)

Question 9

Secure Sockets Layer (SSL) is a transport layer protocol that provides encryption, server and client authentication, and message integrity.

Accepted Answer

A) True 
 B)False  True

Question 10

Which of the following is the most secure encryption scheme that can be used?

Accepted Answer

A)   Symmetric cipher
B)   One-way hash
C)   Steganography
D)   One-time padE) All of the above
F) None of the above

Question 11

Diffie-Hellman provides secure key distribution, confidentiality,
authentication, and nonrepudiation.

Accepted Answer

A) True 
 B)False

Question 12

Which term is used for a message in its original format?

Accepted Answer

A)   Encryption
B)   Decryption
C)   Ciphertext
D)   PlaintextE) A) and D)
F) B) and C) D

Question 13

The U.S. federal government requires the use of DSA, RSA, or Elliptic Curve DSA (ECDSA) and SHA for digital signatures.

Accepted Answer

A) True 
 B)False

Question 14

The U.S. government requires the usage of SHA-2 instead of MD5.

Accepted Answer

A) True 
 B)False

Question 15

DES and 3DES are symmetric algorithms.

Accepted Answer

A) True 
 B)False

Question 16

Which term is used for the amount of time and resources that would be needed to break the encryption?

Accepted Answer

A)   Confusion
B)   Avalanche affect
C)   Work factor
D)   TrapdoorE) C) and D)
F) A) and C) C

Question 17

Which cipher uses 27 shift alphabets with letters being shifted up one place?

Accepted Answer

A)   Scytale cipher
B)   Vigenere cipher
C)   Caesar cipher
D)   World War II EnigmaE) All of the above
F) A) and B)

Question 18

In a hybrid cipher, the asymmetric algorithm provides the keys used for encryption.

Accepted Answer

A) True 
 B)False

Question 19

Which entity creates and signs digital certificates, maintains the certificates, and revokes them when necessary?

Accepted Answer

A)   CRL
B)   OCSP
C)   RA
D)   CAE) A) and B)
F) A) and C)

Question 20

What should you implement to prevent man-in-the-middle attacks against the Diffie-Hellman algorithm?

Accepted Answer

A)   One-way hash
B)   Digital certificates
C)   Zero Knowledge Proof
D)   Private keysE) None of the above
F) B) and C)

Exam 6: Cryptography

Substitution is also referred to as permutation.

Correct AnswerverifiedShow Answer

Julius Caesar created the scytale cipher.

Correct AnswerverifiedShow Answer

The Caesar cipher and the Vigenere cipher are two of the earliest forms of substitution ciphers.

Correct AnswerverifiedShow Answer

Which of the following is NOT a symmetric algorithm?

Correct AnswerverifiedShow Answer

A key is a parameter that controls the transformation of plaintext into ciphertext or vice versa.

Correct AnswerverifiedShow Answer

Which of the following is NOT an e-mail standard?

Correct AnswerverifiedShow Answer

What is another term for a null cipher?

Correct AnswerverifiedShow Answer

Which hash function produces 128-, 160-, or 192-bit hash values after performing 24 rounds of computations on 512-bit blocks?

Correct AnswerverifiedShow Answer

Secure Sockets Layer (SSL) is a transport layer protocol that provides encryption, server and client authentication, and message integrity.

Correct AnswerverifiedTrue

Which of the following is the most secure encryption scheme that can be used?

Correct AnswerverifiedShow Answer

Diffie-Hellman provides secure key distribution, confidentiality, authentication, and nonrepudiation.

Correct AnswerverifiedShow Answer

Which term is used for a message in its original format?

Correct AnswerverifiedD

The U.S. federal government requires the use of DSA, RSA, or Elliptic Curve DSA (ECDSA) and SHA for digital signatures.

Correct AnswerverifiedShow Answer

The U.S. government requires the usage of SHA-2 instead of MD5.

Correct AnswerverifiedShow Answer

DES and 3DES are symmetric algorithms.

Correct AnswerverifiedShow Answer

Which term is used for the amount of time and resources that would be needed to break the encryption?

Correct AnswerverifiedC

Which cipher uses 27 shift alphabets with letters being shifted up one place?

Correct AnswerverifiedShow Answer

In a hybrid cipher, the asymmetric algorithm provides the keys used for encryption.

Correct AnswerverifiedShow Answer

Which entity creates and signs digital certificates, maintains the certificates, and revokes them when necessary?

Correct AnswerverifiedShow Answer

What should you implement to prevent man-in-the-middle attacks against the Diffie-Hellman algorithm?

Correct AnswerverifiedShow Answer

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True

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D

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C

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