Computer Knowledge · General Awareness

Information Security

4,634 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

An unauthorised user X sends too many login requests to a server S using random user ids one after another in quick succession, so as to flood the network and deny the network access of all other legitimate users. What is this type of attack is called?

  1. Masquearade

  2. Denial Of Services (DOS)

  3. Alteration of message

  4. Eavesdropping

  5. Interception
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

Multiple choice

Which of the following algorithms is a symmetric-key cryptography algorithm?

  1. ElGamal cryptographic algorithm

  2. RSA algorithm

  3. IDEA algorithm

  4. Elliptic curve discrete logarithm

  5. Diffie-Hellman algorithm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

IDEA (International Data Encryption Algorithm) is a symmetric-key cryptography algorithm. IDEA operates on 64-bit blocks using a 128-bit key and consists of a series of eight identical transformations and an output transformation (the half-round).

Multiple choice

Which of the following is an incorrect statement about a digital certificate?

  1. Digital certificate or digital id is a kind of digital passport or credential.

  2. Digital id is the user's public key that has itself been digitally signed by someone trusted to do so.

  3. Organisations using digital certificates do not require a relationship with the remote site.

  4. Digital certificate is used to verify the trustworthiness of information.

  5. Digital certificate is used to confirm that a public key belongs to a specific organisation.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A digital certificate is used to verify the trustworthiness of a website and a digital signature is used to verify the trustworthiness of information.

Multiple choice

Which of the following is an incorrect statement about Kerberos protocol?

  1. Kerberos protocol is a network authentication protocol.

  2. Kerberos protocol is a secure protocol.

  3. Kerberos does not perform mutual authentication.

  4. Kerberos protocol requires only a single login per session.

  5. Kerberos depends on a trusted third party – a Key Distribution Centre (KDC).
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kerberos performs mutual authentication.

Multiple choice

Which of the following statements is incorrect about Rijndael security algorithm?

  1. Rijndael security algorithm is a type of DES security algorithm.

  2. Rijndael security algorithm allows only 128, 192 and 256-bit key sizes.

  3. Rijndael security algorithm consists of an initial round key addition, Nr-1 rounds and a final round, where Nr is the number of rounds.

  4. Rijndael security algorithm is designed by Joan Daemen and Vincent Rijmen.

  5. Rijndael is well-suited for software implementations on 8-bit processors.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rijndael security algorithm is a type of AES security algorithm and not a DES security algorithm.