SRA 221 Module 6

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. RSA has no known weaknesses. d. The digest produced by the RSA algorithm is too short to be secure.

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

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

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

a. Downgrade attack

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

a. Hardware Security Module (HSM)

Cryptography can prevent an individual from fraudulently reneging on an action. What is this known as?

a. Nonrepudiation

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

a. SHA

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

a. SHA3-512

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

a. Steganography

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

a. Two files produce the same digest.

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

b. Advanced Encryption Standard

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

b. Digest

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

b. It can only provide limited security.

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

b. Plaintext

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

b. Risk

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

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

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

b. Verify the receiver

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. XOR b. Alphabetic c. ROT13 d. XAND13

c. ROT13

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

d. Alice's public key

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

d. It includes a pseudorandom number generator (PRNG).

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

d. perfect forward secrecy