Key Exchange - CompTIA Security+ SY0-701 - 1.4

Front

What is the primary purpose of data at rest encryption?

Back

To encrypt data stored on devices such as SSDs and hard drives.

Front

Which of the following is an example of full disk encryption on Mac OS? BitLocker, FileVault, EFS, TrueCrypt

Back

FileVault

Front

Explain how column-level encryption can improve database performance compared to transparent encryption.

Back

Column-level encryption only encrypts sensitive columns, allowing non-sensitive data to remain in plain text, which speeds up searches.

Front

Describe a scenario where data in transit encryption is crucial.

Back

When accessing a website over HTTPS to protect web traffic.

Front

What is the role of algorithm transparency in encryption?

Back

It makes encryption algorithms public, increasing trust in their robustness.

Front

Why is key secrecy more important than algorithm secrecy in encryption?

Back

Because knowing the algorithm does not help if the key is unknown.

Front

How does key length affect the security of an encryption system?

Back

Longer keys are more resistant to brute force attacks.

Front

What is the main advantage of using AES over DES?

Back

AES is faster and more secure than DES.

Front

Discuss the trade-offs involved in choosing an encryption algorithm.

Back

Considerations include security level, speed, and complexity of implementation.

Front

What is the purpose of key strengthening techniques?

Back

To increase resistance to brute force attacks by adding computational overhead.