Practical Cryptography

Question 1

Which is a common symmetric key block cipher? Choose more than one option.
A. RSA
B. AES-GCM
C. 3DES-EDE
D. AES-CBC
E. ECDSA
F. Blowfish

Answer 1

B. AES-GCM
C. 3DES-EDE
D. AES-CBC
F. Blowfish

Question 2

Which is a scalable way to bind a public key with an entity identity and offer revocation services?
A. Diffie-Hellman key exchange
B. Digital signing services
C. Hashed message authentication
D. Public key infrastructure

Answer 2

D. Public key infrastructure

Question 3

Which algorithm uses smaller key spaces while offering superior strength for mobile devices and IoT with limited memory and processing power?
A. RSA key exchange
B. Diffie-Helman key exchange
C. SHA-384
D. Elliptic curve

Answer 3

D. Elliptic curve

Question 4

What is often a separate chip on the motherboard (TPM 2.0) that allows manufacturers to build the capability into their chipsets rather than requiring a separate chip?
A. Full disk encryption
B. Trusted platform module
C. Key management service
D. Hardware security module

Answer 4

B. Trusted platform module

Question 5

What is a distributed database that leverages a constantly growing list of ordered records called blocks for asset transfer ledgers, cryptocurrencies, tokens, and smart contracts?
A. Blockchain
B. Tokenization
C. Counter block chaining
D. Steganography

Answer 5

A. Blockchain

Question 6

Alice wants to send Bob a message with origin authentication. Which scenario would apply?
A. The message will be encrypted with Alice’s private key then decrypted with Alice’s public key
B. The message will be encrypted with Bob’s public key then decrypted with Bob’s private key
C. The message will be encrypted with Alice’s public key then decrypted with Alice’s private key
D. The message will be encrypted with Bob’s private key then decrypted with Bob’s public key

Answer 6

A. The message will be encrypted with Alice’s private key then decrypted with Alice’s public key

Question 7

Which type of encryption involves the process of encoding all user data on a solid-state drive?
A. File encryption
B. Partition encryption
C. Volume encryption
D. Full disk encryption

Answer 7

D. Full disk encryption

Question 8

Which is a scalable mechanism for providing authenticity, integrity, and non-repudiation using random public/private key pairs?
A. HMAC
B. Diffie-Hellman
C. Digital Signature
D. RSA

Answer 8

C. Digital Signature

Question 9

What is the technique of adding pseudorandom data to a cryptographic hash function to make it less deterministic for cracking tools?
A. Salting
B. Hashing
C. Collisions
D. Encryption

Answer 9

A. Salting