CISSP Lesson 3 PreTest

Question 2

Which is a characteristic of symmetric algorithms?
A) The sender uses a public and a private key to encrypt a message
B) IPSec is used for the key distribution
C) The same key encrypts and decrypts a message
D) The receiver uses multiple keys to decrypt a message

Answer 2

The same key encrypts and decrypts a message

Question 3

Cryptography does not provide integrity.
A) TRUE
B) FALSE

Answer 3

FALSE

Question 4

What do digital signatures ensure?
A) Nonrepudiation and authentication
B) Confidentiality and availability
C) Integrity and confidentiality
D) Nonrepudiation and integrity

Answer 4

Nonrepudiation and integrity

Question 5

Which are the three transformation layers used by AES?
A) Linear mix transform
B) Substitution transform
C) Nonlinear transform
D) Key addition transform
E) Parallel transform

Answer 5

Linear mix transform
Nonlinear transform
Key addition transform

Question 6

Which is a characteristic of the Blowfish algorithm?
A) Uses an 80-bit key
B) Key can vary from 32 bits to 448 bits
C) It supports key escrow

Answer 6

Key can vary from 32 bits to 448 bits

Question 7

With which two operators will inputs of 1 and 1 result in a 1?
A) AND and XOR
B) OR and XOR
C) OR and AND

Answer 7

OR and AND

Question 8

A transposition cipher is an example of which type of cipher?
A) Stream cipher
B) Block cipher
C) Character cipher

Answer 8

Block cipher

Question 9

A known plaintext attack will not work well on complex algorithms.
A) TRUE
B) FALSE

Answer 9

TRUE

Question 10

What is used to begin a transposition cipher?
A) A numeric value
B) Ciphertext
C) A keyword

Answer 10

A keyword

Question 11

Which statements are true regarding DES? Choose all that apply.
A) It is a stream cipher
B) Uses a 56-bit key
C) Uses 12-bit blocks
D) Works in four modes

Answer 11

Uses a 56-bit key

Works in four modes

Question 12

What is a strength of asymmetric algorithms?
A) Fast
B) Efficient
C) More secure than symmetric algorithms
D) User maintenance and key management is easy

Answer 12

User maintenance and key management is easy

Question 13

Which type of digital signature algorithm has a variable-length key size from 512 bits to 1024 bits?
A) HMAC
B) DSA
C) SHA-1
D) DSS

Answer 13

DSA

Question 14

Which is a characteristic of MOSS?
A) Uses CA-managed digital certificates
B) Provides associations between e-mail addresses and certificates
C) Uses both symmetric and asymmetric algorithms

Answer 14

Provides associations between e-mail addresses and certificates

Question 15

MD5 produces which size digest?
A) 12-bit
B) 64-bit
C) 160-bit

Answer 15

12-bit

Question 16

Which asymmetric algorithm uses modular arithmetic to calculate keys?
A) RSA
B) El Gamal
C) SHA-1
D) DSA

Answer 16

El Gamal

Question 17

The underlying encryption algorithm for 3DES is the same as DES.
A) TRUE
B) FALSE

Answer 17

TRUE

Question 18

What is a man-in-the-middle attack?
A) An attacker encrypts a known plaintext with every possible key while decrypting the associated ciphertext with every
possible key
B) An attacker sits between an intended sender and receiver
C) An attacker uses two simultaneous brute force attacks

Answer 18

An attacker sits between an intended sender and receiver

Question 19

Which IPSec mode is typically used to connect gateways?
A) Tunnel mode
B) Transport mode
C) Transform mode

Answer 19

Tunnel mode

Question 20

A PKI uses digital signatures to manage public keys.
A) True
B) False

Answer 20

FALSE