Chapter 5

The asymmetric cryptography algorithm most commonly used is: A) AES B) RSA C) Twofish D) Blowfish

RSA

Which asymmetric cryptographic algorithm is the most secure? A) SHA-2 B) BTC-2 C) RSA D) ME-14

RSA

Which asymmetric encryption algorithm uses prime numbers? A) EFS B) quantum computing C) ECC D) RSA

RSA

The Trusted Platform Module (TPM) _____. A) allows the user to boot a corrupted disk and repair it B) is available only on Windows computers running BitLocker C) includes a pseudorandom number generator (PRNG) D) provides cryptographic services in hardware instead of software

provides cryptographic services in hardware instead of software

Which of these is NOT a basic security protection for information that cryptography can provide? A) risk loss B) integrity C) confidentiality D) authenticity

risk loss

A digital signature can provide each of the following benefits EXCEPT _____. A) prove the integrity of the message B) verify the receiver C) verify the sender D) enforce nonrepudiation

verify the receiver

Which of these has an onboard key generator and key storage facility, as well as accelerated symmetric and asymmetric encryption, and can back up sensitive material in encrypted form? A) Trusted Platform Module (TPM) B) self-encrypting hard disk drives (HDDs) C) encrypted hardware-based USB devices D) Hardware Security Module (HSM)

Hardware Security Module (HSM)

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? A) Confidentiality B) Availability C) Encryption D) Integrity

Integrity

Using asymmetric cryptography practices, Alex wants to send Jessica an encrypted message that he received from Joel. Additionally, Jessica wants to verify the message came from Alex by viewing his digital signature. Whose keys would be used for what in this scenario? A) Joel's public key would encrypt the message, Joel's private key would decrypt the message, Alex's private key would be used to encrypt the digest, and Alex's public key would be used by Jessica to decrypt the digest. B) Alex's public key will encrypt the message, Alex's private key would be used by Jessica to view the message, Jessica's public key would be used to encrypt the digest, and Jessica's private key would be used to decrypt the digest. C) Joel's public key would encrypt the message, Joel's private key would decrypt the message, Alex's public key would be used to encrypt the digest, and Alex's private key would be used by Jessica to decrypt the digest. D) Jessica's public key will encrypt the message, Jessica's private key would be used to view the message, Alex's private key would be used to encrypt the digest, and Alex's public key would be used by Jessica to decrypt the digest.

Jessica's public key will encrypt the message, Jessica's private key would be used to view the message, Alex's private key would be used to encrypt the digest, and Alex's public key would be used by Jessica to decrypt the digest.

How does SHA-1 differ from the MD4 algorithm? A) MD4 can process 64 bits at a time B) Generally, SHA is considered a more secure hash than MD C) MD4 creates a digest length of 128 bit whereas SHA-1's digest length is 160 bits D) Flaws have not yet been discovered in the MD4 algorithm

MD4 creates a digest length of 128 bit whereas SHA-1's digest length is 160 bits

All of the following can be broken mathematically EXCEPT _____. A) AES B) 3DES C) SHA D) OTP

OTP

What is the name of the cryptographic hash function that has international recognition and has been adopted by standards organizations such as the ISO, that creates a digest of 512 bits and will not be subject to patents? A) Twofish B) Blowfish C) Whirlpool D) Rijndal

Whirlpool

A(n) _____ is not decrypted but is only used for comparison purposes. A) stream B) digest C) algorithm D) key

digest

The Hashed Message Authentication Code (HMAC) _____. A) encrypts only the key B) encrypts the key and the message C) encrypts only the message D) encrypts the DHE key only

encrypts the key and the message

The areas of a file in which steganography can hide data include all of the following EXCEPT _____. A) in data that is used to describe the content or structure of the actual data B) in the directory structure of the file system C) in the file header fields that describe the file D) in areas that contain the content data itself

in the directory structure of the file system

Elliptic Curve Diffie-Hellman (ECDH) is an example of _____. A) in-band key exchange B) out-of-band key exchange C) SHA-1 key management D) AES key certification

in-band key exchange

Which protection is provided by hashing? A) authenticity B) confidentiality C) integrity D) availability

integrity

Proving that a user sent an email message is known as _____. A) repudiation B) integrity C) non-repudiation D) availability

non-repudiation

Public key systems that generate random public keys that are different for each session are called _____. A) Public Key Exchange (PKE) B) Elliptic Curve Diffie-Hellman (ECDH) C) Diffie-Hellman (DH) D) perfect forward secrecy

perfect forward secrecy

After the DES cipher was broken and no longer considered secure, what encryption algorithm was made as its successor? A) AES B) Twofish C) 3DES D) RSA

3DES

Which of these is the strongest symmetric cryptographic algorithm? A) Advanced Encryption Standard B) Data Encryption Standard C) Triple Data Encryption Standard D) Rivest Cipher (RC) 1

Advanced Encryption Standard

If Bob wants to send a secure message to Alice using an asymmetric cryptographic algorithm, which key does he use to encrypt the message? A) Alice's private key B) Alice's public key C) Bob's public key D) Bob's private key

Alice's public key

Which of these is NOT a characteristic of a secure hash algorithm? A) Collisions should be rare. B) The results of a hash function should not be reversed. C) The hash should always be the same fixed size. D) A message cannot be produced from a predefined hash.

Collisions should be rare.

Which of the following key exchanges uses the same keys each time? A) Diffie-Hellman Ephemeral (DHE) B) Diffie-Hellman (DH) C) Diffie-Hellman-RSA (DHRSA) D) Elliptic Curve Diffie-Hellman (ECDH)

Diffie-Hellman (DH)

Why is a homoalphabetic substitution considered a stream cipher? A) It has the ability to make use of block cipher or stream cipher B) It encrypts multiple plaintext character into a single hexadecimal character C) It substitutes multiple characters at once, but the character length is not fixed D) It encrypts one plaintext character at a time

It encrypts one plaintext character at a time

What are the latest versions of the Secure Hash Algorithm? (pick two) A) SHA-2 B) SHA-3 C) SHA-4 D) SHA-5

SHA-2 & SHA-3

Which type of cryptographic algorithm takes an input string of any length, and returns a string of any requested variable length? A) Substitution B) Block C) Loop D) Sponge

Sponge

Which of the following is NOT a benefit of USB device encryption? A) Administrators can initiate a self-destruct command to eliminate data B) Administrators can lock a user out of the device during the next connection C) Files moved to the USB are automatically encrypted D) The USB device can encrypt the hard drive of an attacker when they attempt to access data

The USB device can encrypt the hard drive of an attacker when they attempt to access data

What is data called that is to be encrypted by inputting it into an cryptographic algorithm? A) plaintext B) cleartext C) opentext D) ciphertext

plaintext

A key that is generated by a symmetric cryptographic algorithm is said to be a: A) private key B) public key C) symmetric key D) shared key

private key