APCSP Cybersecurity 3

Question 1

Which cryptographic concept ensures that a sender cannot later deny having sent a message?

Accepted Answer

Non-repudiation

Answer

Non-repudiation, often achieved through digital signatures, prevents a sender from falsely claiming they did not send a message.

Question 2

A user receives an email claiming to be from their bank asking them to verify account details via a link. What type of attack is this?

Accepted Answer

Phishing

Answer

Phishing uses deceptive emails impersonating trusted entities to trick users into revealing sensitive information.

Question 3

What is the role of a firewall in network security?

Accepted Answer

Filtering network traffic based on rules

Answer

A firewall monitors and controls incoming and outgoing network traffic according to predefined security rules.

Question 4

In the context of public-key cryptography, which key should a user share publicly to receive encrypted messages?

Accepted Answer

Public key

Answer

In asymmetric encryption, the public key is shared openly so others can encrypt messages that only the holder of the private key can decrypt.

Question 5

Which of the following is an example of multi-factor authentication (MFA)?

Accepted Answer

A password combined with a fingerprint scan

Answer

MFA requires two or more verification factors from different categories (something you know, have, or are), such as a password plus biometric.

(APCSP) AP Computer Science Principles Practice Test