Module 2 - 4th

Symmetric Cryptography is also called as

• Shared Key Cruptogtography

• Symmetric Key Cryptography

• Secret Key Cryptography

• None of the above

____ is a number that can be used only once in a cryptographic protocol.

• Nonce

• Sequence Number

• Random Number

• Fixed number

Message Authentication Codes (MACs) are also called as _____

• Keyless Hash Functions

• Authentication Functions

• Cryptographic Functions

• Keyed Hash Functions

In HMACs the sender signs a message using the MAC and the receiver verifies it using shared keys.

• False

• True

• May be

The applications of hash functions in Blockchain Technologies are.........

• Merkle Trees

• Patricia Trees

• Distributed Hash Tables

• All of the above

.................. are encryption algorithms that apply encryption algorithm on a bit-by-bit basis.

• Block ciphers

• Stream Ciphers

• HMACs

• None of the above

Stream Ciphers are

1. i. Synchronous

2. ii. Asynchronous

3. iii. Random

• i only

• ii only

• i,ii,iii

• i and ii only

Block ciphers are built using a design strategy known as .............

• Stream Cipher Design

• Feistel Cipher

• Asymmetric Encryption

• Hash Function