Unit 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? integrity diffusion confusion chaos

confusion

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

digest

The Hashed Message Authentication Code (HMAC) _____. hashes only the message hashes the key and the message hashes the DHE key only 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 the directory structure of the file system in areas that contain the content data itself in data that is used to describe the content or structure of the actual data

in the directory structure of the file system

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

non-repudiation

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

perfect forward secrecy

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

plaintext

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

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 receiver verify the sender

verify the receiver

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

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? 0 16 1 2

0

Which of these is the strongest symmetric cryptographic algorithm? Triple Data Encryption Standard Data Encryption Standard RC 1 Advanced 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 private key Bob's private key Alice's public key Bob's public key

Alice's public key

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

Collisions should be rare.

Which of the following key exchanges uses the same keys each time? Diffie-Hellman-RSA (DHRSA) Elliptic Curve Diffie-Hellman (ECDH) Diffie-Hellman Ephemeral (DHE) 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? Trusted Platform Module (TPM) self-encrypting hard disk drives (SED) encrypted hardware-based USB devices Hardware Security Module (HSM)

Hardware Security Module (HSM)

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

RSA

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

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 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. 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.

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