What is a key characteristic of asymmetric encryption?

It uses a pair of keys: one public and one private

It is faster than symmetric encryption for large files

It does not require key management

It uses the same key for encryption and decryption

A security team needs to ensure that a software update package is authentic and has not been tampered with. The team has the vendor's public key. Which process should they use to verify the package?

Encrypt the package with the vendor's public key and compare the result.

Verify a digital signature attached to the package using the vendor's public key.

Decrypt the package using the vendor's public key.

Compare the package's SHA-256 hash with a hash published on the vendor's website.

A developer needs to encrypt a file so that multiple recipients can decrypt it, but the file is large. The developer wants to minimize CPU overhead while ensuring that each recipient can decrypt the file with their own private key. Which approach should the developer use?

Use a hash of the file as the encryption key.

Encrypt the file with a single symmetric key and share the key via email.

Encrypt the file separately with each recipient's public key.

Generate a random symmetric key, encrypt the file with that key, and encrypt the symmetric key with each recipient's public key.

CompTIALinux+

Domain 3Objective 5

Cryptography XK0-006 Practice Questions (Page 6)

Part of the Security domain, which accounts for 18% of the XK0-006 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–11 in this domain), expect 1–2 from this objective — we provide 35 practice questions to prepare you well beyond it. (estimate)

35questions here

7free pages

9concepts

18%of the exam

Questions 26–30

26foundation · easy
What is a key characteristic of asymmetric encryption?
Select an answer first
27expert · hard
A security team needs to ensure that a software update package is authentic and has not been tampered with. The team has the vendor's public key. Which process should they use to verify the package?
Select an answer first
28foundation · easy
Which command is used to compute a SHA-256 hash of a file to verify its integrity?
Select an answer first
29foundation · easy
A Linux administrator needs to encrypt a sensitive file so that only someone with the correct passphrase can read its contents. Which command-line tool is specifically designed for this purpose?
Select an answer first
30expert · hard
A developer needs to encrypt a file so that multiple recipients can decrypt it, but the file is large. The developer wants to minimize CPU overhead while ensuring that each recipient can decrypt the file with their own private key. Which approach should the developer use?
Select an answer first

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Cryptography XK0-006 Practice Questions (Page 6)

Questions 26–30

What is a key characteristic of asymmetric encryption?

A security team needs to ensure that a software update package is authentic and has not been tampered with. The team has the vendor's public key. Which process should they use to verify the package?

Which command is used to compute a SHA-256 hash of a file to verify its integrity?

A Linux administrator needs to encrypt a sensitive file so that only someone with the correct passphrase can read its contents. Which command-line tool is specifically designed for this purpose?

A developer needs to encrypt a file so that multiple recipients can decrypt it, but the file is large. The developer wants to minimize CPU overhead while ensuring that each recipient can decrypt the file with their own private key. Which approach should the developer use?

Keep studying — Security