Quiz Module 06 Basic Cryptography

Which of the following is not to be decrypted but is only used for comparison purposes? a. Digest b. Stream c. Key d. Algorithm

Digest

Basil was reading about a new attack that forces the system to abandon a higher cryptographic security mode of operation and instead fall back to an older and less secure mode. What type of attack is this? a. Downgrade attack b. Pullback attack c. Deprecation attack d. Obfuscation attack

Downgrade attack

Which of these provides cryptographic services and is external to the device? a. Trusted Platform Module (TPM) b. encrypted hardware-based USB devices c. Hardware Security Module (HSM) d. self-encrypting hard disk drives (SED)

Hardware Security Module (HSM)

Which of the following is FALSE about "security through obscurity"? a. Proprietary cryptographic algorithms are an example. b. It attempts to hide the existence from outsiders. c. It can only provide limited security. d. It is essentially impossible.

It can only provide limited security.

Which of these is NOT a basic security protection for information that cryptography can provide? a. Authenticity b. Integrity c. Confidentiality d. Risk

Risk

Which of the following is NOT a symmetric cryptographic algorithm? a. DES b. SHA c. 3DES d. Blowfish

SHA

Cicero is researching hash algorithms. Which algorithm would produce the longest and most secure digest? a. SHA-256 b. SHA6-6 c. MD5 d. SHA3-512

SHA3-512

Which of the following hides the existence of information? a. Decryption b. Encryption c. Steganography d. Ciphering

Steganography

What is low latency? a. The requirements for an IoT device that is using a specific network. b. A low-power source requirement of a sensor. c. The delay between when a substitution cipher decrypts the first block and when it finishes with the last block. d. The time between when a byte is input into a cryptographic cipher and when the output is obtained.

The time between when a byte is input into a cryptographic cipher and when the output is obtained.

What is a collision? a. Two files produce the same digest. b. Two algorithms have the same key. c. Two keys are the same length. d. Two ciphertexts have the same length.

Two files produce the same digest.

Egor wanted to use a digital signature. Which of the following benefits will the digital signature NOT provide? a. Prove the integrity of the message b. Verify the receiver c. Enforce nonrepudiation d. Verify the sender

Verify the receiver

What are public key systems that generate different random public keys for each session? a. Public Key Exchange (PKE) b. Diffie-Hellman (DH) c. Elliptic Curve Diffie-Hellman (ECDH) d. perfect forward secrecy

perfect forward secrecy

Which of these is the strongest symmetric cryptographic algorithm? a. Triple Data Encryption Standard b. Advanced Encryption Standard c. Data Encryption Standard d. RC1

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 public key b. Bob's public key c. Bob's private key d. Alice's private key

Alice's public key

Deo has been asked to explain RSA to his colleague. After his explanation, Deo is asked what, if any, weaknesses RSA has. How would Deo respond? a. As computers become more powerful, the ability to compute factoring has increased. b. RSA weaknesses are based on ECC. c. The digest produced by the RSA algorithm is too short to be secure. d. RSA has no known weaknesses.

As computers become more powerful, the ability to compute factoring has increased.

Which of these is NOT a characteristic of a secure hash algorithm? a. The results of a hash function should not be reversed. b. Collisions should occur no more than 15 percent of the time. c. The hash should always be the same fixed size. d. A message cannot be produced from a predefined hash.

Collisions should occur no more than 15 percent of the time.

Brielle is researching substitution ciphers. She came across a cipher in which the entire alphabet was rotated 13 steps. What type of cipher is this? a. Alphabetic b. XOR c. ROT13 d. XAND13

ROT13

Which of the following is NOT a characteristic of the Trusted Platform Module (TPM)? a. It can generate asymmetric cryptographic public and private keys. b. It can easily be transported to another computer. c. It includes a pseudorandom number generator (PRNG) d. It provides cryptographic services in hardware instead of software.

It includes a pseudorandom number generator (PRNG)

Cryptography can prevent an individual from fraudulently reneging on an action. What is this known as? a. Repudiation b. Obfuscation c. Nonrepudiation d. Integrity

Nonrepudiation

What is data called that is to be encrypted by inputting it into a cryptographic algorithm? a. Cleartext b. Plaintext c. Byte-text d. Ciphertext

Plaintext