IAS2_MIDTERM_EXAM_ 2ND_SEMESTER_SY.24_25

What is the primary purpose of cryptography?

• To make data transmission faster

• To transform data into an unreadable format for security

• To increase internet speed

• To create complex passwords

Which of the following best defines "Computer Security"?

• Measures to protect data during transmission

• Generic name for tools designed to protect data and thwart hackers

• Protection of data over interconnected networks

• None of the above

Which security service ensures that only authorized parties can read transmitted information?

• Authentication

• Integrity

• Confidentiality

• Availability

What does "Encipher" mean in cryptography?

• The process of converting ciphertext back to plaintext

• The process of converting plaintext into ciphertext

• The study of breaking encryption

• A form of internet security

What distinguishes symmetric-key encryption from public-key encryption?

• Symmetric-key encryption uses the same key for both encryption and decryption

• Public-key encryption uses only one key

• Symmetric-key encryption requires two separate keys

• Public-key encryption is not used for secure communications

What is an example of a passive attack?

• Masquerade attack

• Modification of messages

• Eavesdropping on network traffic

• Denial of Service attack

Which type of attack involves inserting counterfeit objects into a system?

• Interruption

• Interception

• Modification

• Fabrication

What is steganography primarily used for?

• Encrypting messages to make them unreadable

• Hiding the existence of a message within another medium

• Creating strong passwords

• Preventing Denial of Service attacks

Which security mechanism is primarily used to detect, prevent, or recover from security attacks?

• Security attack

• Security service

• Security mechanism

• Security encryption

What is a major drawback of steganography?

• It is easy to detect by attackers

• It requires a large amount of overhead to hide small amounts of data

• It cannot be used in digital communications

• It replaces encryption entirely