Ch 3 - Basic Cryptography

C Danvers
Quiz by C Danvers, updated more than 1 year ago
C Danvers
Created by C Danvers almost 2 years ago
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Ch 3 quiz
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Question 1

Question
A collision attack is an attempt to find two input strings of a hash function that produce the same hash result.
Answer
  • True
  • False

Question 2

Question
After the DES cipher was broken and no longer considered secure, what encryption algorithm was made as its successor?
Answer
  • AES
  • RSA
  • Twofish
  • 3DES

Question 3

Question
Asymmetric cryptographic algorithms are also known as private key cryptography.
Answer
  • True
  • False

Question 4

Question
Ciphertext is the scrambled and unreadable output of encryption.
Answer
  • True
  • False

Question 5

Question
Data that is in an unencrypted form is referred to as which of the following?
Answer
  • plain text
  • crypttext
  • cleartext
  • simpletext

Question 6

Question
Encryption is the practice of transforming information so that it is secure and cannot be accessed by unauthorized parties.
Answer
  • True
  • False

Question 7

Question
GNU Privacy Guard a proprietary software that runs on different operating systems.
Answer
  • True
  • False

Question 8

Question
If Bob receives an encrypted reply message from Alice, whose private key is used to decrypt the received message?
Answer
  • Alice's private key
  • Bob's private key
  • Bob's private key and Alice's public key
  • Bob and Alice's keys

Question 9

Question
If using the MD5 hashing algorithm, what is the length to which each message is padded?
Answer
  • 64 bits
  • 128 bits
  • 32 bits
  • 512 bits

Question 10

Question
In cryptography, which of the five basic protections ensures that the information is correct and no unauthorized person or malicious software has altered that data?
Answer
  • confidentiality
  • encryption
  • availability
  • integrity

Question 11

Question
In information technology, non-repudiation is the process of proving that a user performed an action.
Answer
  • True
  • False

Question 12

Question
In which type of encryption is the same key used to encrypt and decrypt data?
Answer
  • public
  • asymmetric
  • symmetric
  • private

Question 13

Question
Obfuscation is making something well known or clear.
Answer
  • True
  • False

Question 14

Question
One of the first popular symmetric cryptography algorithms was RSA.
Answer
  • True
  • False

Question 15

Question
The SHA-1 hashing algorithm creates a digest that is how many bits in length?.
Answer
  • 192 bits
  • 160 bits
  • 128 bits
  • 96 bits

Question 16

Question
The simplest type of stream cipher, one in which one letter or character is exchanged for another, is known as what?
Answer
  • loop
  • lock
  • substitution
  • shift

Question 17

Question
The XOR cipher is based on the binary operation eXclusive OR that compares two bits.
Answer
  • True
  • False

Question 18

Question
What alternative term can be used to describe asymmetric cryptographic algorithms?
Answer
  • public key cryptography
  • user key cryptography
  • private key cryptography
  • cipher-text cryptography

Question 19

Question
What cryptographic method, first proposed in the mid-1980s, makes use of sloping curves instead of large prime numbers?
Answer
  • RSA
  • ECC
  • FCC
  • IKE

Question 20

Question
What is a block cipher algorithm that operates on 64-bit blocks and can have a key length from 32 to 448 bits?
Answer
  • Blowfish
  • Whirlpool
  • Rijndal
  • Twofish

Question 21

Question
What is the U.S. federal government standard for digital signatures?
Answer
  • Data Encryption Standard
  • Advanced Encryption Standard
  • Digital Signature Algorithm
  • Elliptic Curve Cryptography

Question 22

Question
What technology uses a chip on the motherboard of the computer to provide cryptographic services?
Answer
  • SEDs
  • TPM
  • FDE
  • HSM

Question 23

Question
What term best describes when cryptography is applied to entire disks instead of individual files or groups of files?
Answer
  • full disk encryption
  • system encryption
  • OS encryption
  • disk encryption

Question 24

Question
What term describes data actions being performed by endpoint devices, such as printing a report from a desktop computer?
Answer
  • data-in-transit
  • data-at-rest
  • data-in-use
  • data-in-play

Question 25

Question
What type of cipher takes one character and replaces it with one character, working one character at a time?
Answer
  • block cipher
  • unit cipher
  • single cipher
  • stream cipher

Question 26

Question
What type of cryptographic algorithm creates a unique digital fingerprint of a set of data?
Answer
  • hash
  • block
  • digest
  • key

Question 27

Question
What type of cryptography uses two keys instead of just one, generating both a private and a public key?
Answer
  • shared
  • asymmetric
  • symmetric
  • open

Question 28

Question
What type of message authentication code uses hashing to authenticate the sender by using both a hash function and a secret cryptographic key?
Answer
  • RIPEMD
  • HMAC
  • SHA-384
  • MD5

Question 29

Question
What widely used commercial asymmetric cryptography software can be used for encrypting files and email messages?
Answer
  • PGP
  • GPG
  • EFS
  • GNUPG

Question 30

Question
When Bob needs to send Alice a message with a digital signature, whose private key is used to encrypt the hash?
Answer
  • Bob's private key
  • Bob and Alice's keys
  • Alice's private key
  • Bob's private key and Alice's public key

Question 31

Question
Which hash algorithm's primary design feature is two different and independent parallel chains of computation, the results of which are then combined at the end of the process?
Answer
  • HMAC
  • RIPEMD
  • SHA-384
  • MD5

Question 32

Question
Which key exchange requires Alice and Bob to each agree upon a large prime number and related integer?
Answer
  • Prime-Curve
  • Quantum Prime
  • Elliptic Curve Diffie-Hellman
  • Diffie-Hellman

Question 33

Question
Which of the following are considered to be common asymmetric cryptographic algorithms? (Choose all that apply.)
Answer
  • Digital Signature Algorithm
  • Elliptic Curve Cryptography
  • Data Encryption Standard
  • Advanced Encryption Standard

Question 34

Question
Which of the following asymmetric cryptography algorithms is most commonly used?
Answer
  • AES
  • Blowfish
  • RSA
  • Twofish

Question 35

Question
Which of the following is a public key system that generates random public keys that are different for each session?
Answer
  • public secrecy
  • ephemeral-secrecy
  • random-key exchange
  • perfect forward secrecy

Question 36

Question
Which of the following is more secure than software encryption?
Answer
  • hardware encryption
  • full disk encryption
  • private encryption
  • application encryption

Question 37

Question
Which of the following is not one of the functions of a digital signature?
Answer
  • verification of the sender
  • protect the public key
  • prove the integrity of the message
  • prevention of the sender from disowning the message

Question 38

Question
Which standard was approved by NIST in late 2000 as a replacement for DES?
Answer
  • AES
  • Twofish
  • RSA
  • 3DES

Question 39

Question
Which type of cryptographic algorithm takes an input string of any length, and returns a string of any requested variable length?
Answer
  • sponge
  • block
  • substitution
  • loop

Question 40

Question
Wireless data networks are particularly susceptible to known ciphertext attacks.
Answer
  • True
  • False
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