CASE CASE Cryptography & Data Protection

Question 1

What is the primary characteristic of symmetric encryption?

Accepted Answer

It uses the same key for both encryption and decryption

Answer

It uses different keys for encryption and decryption

Answer

It generates digital signatures only

Answer

It hashes data without a key

Question 2

Which NIST-approved algorithm is the current symmetric block cipher standard?

Accepted Answer

AES

Answer

RSA

Answer

ECC

Answer

DSA

Question 3

What key length does AES-256 use?

Accepted Answer

256 bits

Answer

128 bits

Answer

192 bits

Answer

512 bits

Question 4

What does TLS protect in application security?

Accepted Answer

Data in transit between communicating parties

Answer

Data at rest on disk

Answer

Data in use within memory

Answer

Archived backup data

Question 5

Why is symmetric encryption preferred over asymmetric for bulk data encryption?

Accepted Answer

It is significantly faster and more efficient for large volumes

Answer

It provides stronger security guarantees

Answer

It does not require key exchange

Answer

It supports digital signatures

Question 6

Which term describes inactive data stored on a disk, database, or storage medium?

Accepted Answer

Data at rest

Answer

Data in transit

Answer

Data in use

Answer

Data in processing