Computer Knowledge ยท General Awareness

Information Security

4,143 Questions

Information security involves protecting computer systems and data from unauthorized access, cyber threats, and damage. It is a core part of the computer knowledge section in various banking and government exams. Practicing these concepts helps in understanding digital signatures, network security, and access control effectively.

Cybersecurity threatsAccess controlCryptography basicsSecurity risk managementDatabase protection

Information Security Questions

Multiple choice

Which of the following is a false statement?

  1. Hash functions condenses arbitrary message to fixed size.

  2. A digital signature uses a hash function.

  3. There are quite a few similarities in the evolution of hash functions and block ciphers.

  4. Hash function is used to produce a fingerprint of a file, message, or other block of data.

  5. None of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

All of the above statements are true.

Multiple choice

Which of the following statements is false about Message Authentication Code (MAC)?

  1. MAC uses an algorithm that creates a small fixed-sized block.

  2. It uses both secret key as well as public key to generate a small fixed-size block of data.

  3. It provides assurance that message is unaltered and comes from sender.

  4. MAC algorithm need not be reversible.

  5. MAC does not work like a digital signature.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is false at it only uses a secret key for that and not any public key.

Multiple choice

Which of the following is not true about SHA (Secure Hash Algorithm) algorithm?

  1. SHA function processing message in 1024-bit blocks.

  2. It is widely used in SSL, PGP, SSH, S/MIME, and IPsec.

  3. SHA was designed for compatibility with increased security provided by the AES cipher.

  4. None of the above

  5. Both (3) and (4).
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, this is correct answer. All of the above are the true statements.

Multiple choice

Which of the following is not true about digital signature?

  1. A digital signature verifies author, date and time of signature.

  2. Digital signature works on public-key cryptography.

  3. Digital signature protects two parties, who exchange messages from any third party.

  4. A digital signature made by sender signing entire message or hash with private-key.

  5. Both (3) and (4).
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It does not protects two parties against each other.

Multiple choice

What is the use of Ticket-Granting Server (TGS) in Kerberos?

  1. It provides login validity of the user.

  2. It provides synchronization to the message.

  3. It provides message authentication.

  4. It provides proof of identity of users.

  5. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, TGS provides proof of identity of tickets.

Multiple choice

What is phishing?

  1. a government plan

  2. a stem cell

  3. fraudulent way of acquiring PIN and bank passwords using e-mail

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phishing is a cybercrime where attackers impersonate legitimate organizations via email or fake websites to trick victims into revealing sensitive information like PINs, passwords, and credit card details. It is not a government plan or biological term. The term comes from 'fishing' where bait is used to catch victims - the 'ph' spelling is attributed to hacker culture.