Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following security attacks is not an active attack? ORWhich of the following attacks is a passive attack?

A. Masquerade

B. Modification of message

C. Denial of service

D. Traffic analysis

Correct Answer :

D. Traffic analysis


In a passive attack, the attacker does not modify any part of the data. His attempt is only to obtain the information and not to modify it. From the mentioned options, this happens only in Traffic analysis in which the attacker monitors the pattern of transmission. The rest other options are examples of active attacks.

Related Questions

What is the correct answer?

4

Which of the following options is not correct according to the definition of the Hash Function?

A. Hash Functions are mathematical functions

B. They compress the input values

C. The hash functions work on arbitrary length input but produces fixed length output.

D. None of the above

What is the correct answer?

4

Digital Signatures authenticates the sender by appending the original message with the ____ digest.

A. Decrypted message

B. Encrypted message

C. Systematic approach

D. None of the mentioned above

What is the correct answer?

4

Cipher block chaining or CBC is an advancement made on _____.

A. Electronic Code Book

B. Decrypted code

C. System engineering

D. All of the mentioned above

What is the correct answer?

4

Quantum cryptography is the science of exploiting quantum mechanical properties to perform _____.

A. Cryptographic system

B. Cryptographic tasks

C. Decryption system

D. None of the mentioned above

What is the correct answer?

4

Which of the following cannot be chosen as a key in the Caesar cipher?

A. An integer

B. An alphabet (A-Z or a-z)

C. A string

D. None of the above

What is the correct answer?

4

Post-Quantum Cryptography is a classical cryptographic scheme that is conjectured to be secure against ____.

A. Quantum adversaries

B. Quantum integration

C. Quantum hash

D. None of the mentioned above

What is the correct answer?

4

_____ and ______ protocol models can be extended to Entangled particles theory.

A. SARG04 and HTTP

B. FTP and SSP

C. SARG04 and SSP

D. HTTP and FTP

What is the correct answer?

4

The DES (Data Encryption Standard) cipher follows the fiestal structure. Which of the following properties are not shown by the fiestal structure?

A. The input text is divided into two parts: one being left half and another one being right half.

B. Swapping of the left and right halves are performed after each round.

C. The plain text is converted into a matrix form first

D. None of the above

What is the correct answer?

4

What is the full-form of RSA in the RSA encryption technique?

A. Round Security Algorithm

B. Rivest, Shamir, Adleman

C. Robert, Shamir, Addie

D. None of the above

What is the correct answer?

4

Which of the following is a mode of operation for the Block ciphers in cryptography?

A. Electronic Code Book (ECB)

B. Cipher Block Chaining (CBC)

C. Counter (CTR) mode

D. All of the above

What is the correct answer?

4

Which of the following ciphers uses asymmetric key cryptography?

A. Rail Fence Cipher

B. Data Encryption Standard (DES)

C. Diffie Hellman Cipher

D. None of the above

What is the correct answer?

4

Which possible Attacks in Quantum Cryptography can take place?

A. Possible Attacks in Quantum Cryptography and Birthday Attack

B. Birthday attack and Boomerang attack

C. Brute force attack and Faked-State-Attack

D. Possible Attacks in Quantum Cryptography and Faked-State Attack

What is the correct answer?

4

A hash function is a _____ that converts a numerical input value into another compressed numerical value.

A. Abstract view

B. Mathematical function

C. Both A and B

D. None of the mentioned above

What is the correct answer?

4

How many sub-keys in the total are used by the IDEA for encrypting the plain text into ciphertext?

A. 64 sub- keys

B. 48 sub- keys

C. 52 sub- keys

D. Only one key and no subkeys

What is the correct answer?

4

Which of the following is the main disadvantage of the ECB (Electronic Code Book)?orWhich of the following is the major drawback of ECB?

A. It requires large block size

B. Padding is done to make the plain text divisible into blocks of fixed size

C. It is prone to cryptanalysis since there is a direct relationship between plain text and cipher text.

D. None of the above

What is the correct answer?

4

A cryptographic hash function is an equation used to verify the ____ of data.

A. Variety

B. Validity

C. Veracity

D. None of the mentioned above

What is the correct answer?

4

An initialization vector (IV) or starting variable (SV) is a block of bits that is used by several modes to _____.

A. Randomize the decryption

B. Randomize the encryption

C. Minimize and maximize the randomization

D. None of the mentioned above

What is the correct answer?

4

Which one of the following algorithms is not used in asymmetric-key cryptography?

A. DSA algorithm

B. Electronic code book algorithm

C. Diffie-Hellman algorithm

D. RSA algorithm

What is the correct answer?

4

Cipher in cryptography is

A. Encrypted message

B. Algorithm for performing encryption and decryption

C. Both algorithm for performing encryption and decryption and encrypted message

D. Decrypted message

What is the correct answer?

4

Cryptographic hashing provides a barrier to potential _______.

A. Attackers

B. Sender

C. Receiver

D. None of the mentioned above

What is the correct answer?

4

In the AES-128 algorithm there are mainly __________ similar rounds and _________ round is different from other round.

A. 5 similar rounds having 2 pair ; every alternate

B. 9 ; the last

C. 8 ; the first and last

D. 10 ; no

What is the correct answer?

4

Block ciphers accumulate symbols in a message of a ______.

A. Fixed size

B. Variable

C. Integration

D. All of the mentioned above

What is the correct answer?

4

Which of the following security attacks is not an active attack? ORWhich of the following attacks is a passive attack?

A. Masquerade

B. Modification of message

C. Denial of service

D. Traffic analysis

What is the correct answer?

4

What is the output of the N 1024-bit blocks from the Nth stage in this?

A. 512 bits

B. 1024 bits

C. N x 1024bits

D. N x 512 bits

What is the correct answer?

4

Hash functions are used in ___ and have variable levels of complexity and difficulty.

A. System approach

B. Cyber safe

C. Cryptography

D. None of the mentioned above

What is the correct answer?

4

Among the following given options, chose the strongest encryption technique?

A. DES ( Data Encryption Standard)

B. Double DES

C. Triple DES

D. AES (Advance Encryption Standard)

What is the correct answer?

4

Which of the following modes of operations can be followed for both stream ciphers as well as block ciphers?

A. CBC (Cipher Block Chaining)

B. ECB (Electronic Code Book)

C. CFB (Cipher text Feed Back)

D. All of the above

What is the correct answer?

4

What is the block size of plain text in SHA- 512 algorithm?

A. 512 bits

B. 1024 bits

C. 2048 bits

D. None of the above

What is the correct answer?

4

When a hash function is used to provide message authentication, the hash function value is called to as:

A. Message Field

B. Message Digest

C. Message Score

D. Message Leap

What is the correct answer?

4

The greatest threat is to public cryptography or asymmetric algorithms used for ____.

A. Digital signatures and

B. Key exchange

C. Both A and B

D. None of the mentioned above