Understanding Caesar Cipher Concepts

The video tutorial introduces the Caesar Cipher, a classical encryption technique. It explains the substitution method used in the cipher, where each letter in the plaintext is replaced by a letter three positions down the alphabet. The tutorial covers the algorithm for both encryption and decryption, providing a detailed example of encrypting the text 'neso Academy'. The session concludes with a homework question on decryption, reinforcing the learning objectives.

What is the main outcome of the session on Caesar Cipher?

• Understanding the history of cryptography

• Learning about modern encryption techniques

• Understanding Caesar Cipher with examples

• Exploring the life of Julius Caesar

Which of the following is NOT a classical encryption technique?

• Caesar Cipher

• Substitution technique

• Quantum encryption

• Transposition technique

Caesar Cipher is categorized under which type of encryption technique?

• Asymmetric key technique

• Symmetric key technique

• Substitution technique

• Transposition technique

In Caesar Cipher, how many places are letters shifted down the alphabet?

• Five places

• Four places

• Three places

• Two places

What is the key value used in Caesar Cipher by default?

• 3

• 2

• 1

• 4

What is the purpose of the mod 26 operation in Caesar Cipher?

• To increase the complexity of the cipher

• To ensure the result stays within the range of the alphabet

• To convert letters to numbers

• To make the cipher more secure

In the example provided, what is the encrypted form of the letter 'N'?

• Q

• P

• O

• R

What is the first step in decrypting a message encrypted with Caesar Cipher?

• Divide the key value by the cipher text

• Subtract the key value from the cipher text

• Add the key value to the cipher text

• Multiply the key value with the cipher text