ITN 260 Chapter 3 Quiz

Alyosha was explaining to a friend the importance of protecting a cryptographic key from cryptoanalysis. He said that the key should not relate in a simple way to the cipher text. Which protection is Alyosha describing? confusion integrity chaos diffusion

confusion

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

digest

The Hashed Message Authentication Code (HMAC) _____. hashes the key and the message hashes the DHE key only hashes only the message hashes only the key

hashes the key and the message

Which areas of a file cannot be used by steganography to hide data? in the file header fields that describe the file in data that is used to describe the content or structure of the actual data in areas that contain the content data itself in the directory structure of the file system

in the directory structure of the file system

Proving that a user sent an email message is known as _____. availability integrity repudiation non-repudiation

non-repudiation

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

perfect forward secrecy

What is data called that is to be encrypted by inputting it into a cryptographic algorithm? cleartext ciphertext opentext plaintext

plaintext

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

risk loss

Egor wanted to use a digital signature. Which of the following benefits will the digital signature not provide? prove the integrity of the message enforce nonrepudiation verify the sender verify the receive

verify the receiver

Illya was asked to recommend the most secure asymmetric cryptographic algorithm to his supervisor. Which of the following did he choose? SHA-2 BTC-2 RSA ME-312

RSA

What is the latest version of the Secure Hash Algorithm? SHA-4 SHA-5 SHA-3 SHA-2

SHA-3

Abram was asked to explain to one of his coworkers the XOR cipher. He showed his coworker an example of adding two bits, 1 and 1. What is the result of this sum? 16 1 2 0

0

which of these is the strongest symmetric cryptographic algorithm? Triple Data Encryption Standard RC 1 Advanced Encryption Standard Data Encryption Standard

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? Alice's public key Alice's private key Bob's public key Bob's private key

Alice's public key

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

Collisions should be rare.

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

Diffie-Hellman (DH)

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? self-encrypting hard disk drives (SED) Hardware Security Module (HSM) encrypted hardware-based USB devices Trusted Platform Module (TPM)

Hardware Security Module (HSM)

What is a characteristic of the Trusted Platform Module (TPM)? It provides cryptographic services in hardware instead of software It allows the user to boot a corrupted disk and repair it It is available only on Windows computers running BitLocker It includes a pseudorandom number generator (PRNG)

It provides cryptographic services in hardware instead of software

At a staff meeting one of the technicians suggested that the enterprise protect its new web server by hiding it and not telling anyone where it is located. Iosif raised his hand and said that security through obscurity was a poor idea. Why did he say that? It depends too heavily upon non-repudiation in order for it to succeed. It would be essentially impossible to keep its location a secret from everyone. It is an unproven approach and has never been tested. It would be too costly to have one isolated server by itself.

It would be essentially impossible to keep its location a secret from everyone.

Alexei was given a key to a substitution cipher. The key showed that the entire alphabet was rotated 13 steps. What type of cipher is this? ROT13 XAND13 AES Alphabetic

ROT13