Information Security

It creates Optimal Asymmetric Encryption Padding key exchange data using RSA.

It is incorrect.

A PIN (Personal Identification Number) is a confidential numeric code used to verify the identity of a cardholder. It must be kept secret and never shared, as anyone with your PIN can access your account. The term 'confidential number' correctly describes the secret nature of a PIN.

A packet analyser (also known as a network analyser, protocol analyser or packet sniffer—or, for particular types of networks, an Ethernet sniffer or wireless sniffer) is a computer program or piece of computer hardware that can intercept and log traffic that passes over a digital network or part of a network.

A port scanner is a software application designed to probe a server or host for open ports. This is often used by administrators to verify security policies of their networks and by attackers to identify running services on a host with the view to compromise it.

It attempts to verify that protection mechanism built into a system will in fact protect it from improper penetration.

This type of attack is called interception.

Both i and ii are correct statements. 

Both statements are incorrect about passive attack.

These all are active attacks.

This is an example of DOS attack. DOS attacks make an attempt to prevent users from accessing some services, which they are eligible for.

Principle of confidentiality specifies that only the sender and the intended recipient(s) should be able to access the content of the message.

All the four are principles of security.

Person who breaks cipher text back into plain text is called a cryptanalyst.

An attack on a cipher text message, wherein the attacker attempts to use all possible permutation and combination is called Brute-force attack.