Question

QUESTION 1

What does D_K(E_K(P)) correspond to?

		Plain Text
		Cypher Text
		Gibberish
		Encryption Key
		None of these

QUESTION 2

What is the goal of Cryptanalysis?

		Attempt to break a single message
		Attempt to recognize patterns in encrypted messages
		Attempt to deduce the key
		Attempt to find weaknesses in the implementation
		Attempt to break the algorithm
		All of these

QUESTION 3

What is the maximum possible keys in Ceaser cipher?

QUESTION 4

Choose ALL that are true for Symmetric Key Encryption

		Encryption and Decryption Keys are same
		They are faster than Asymmetric Encryption
		Key distribution is effective
		None of these

QUESTION 5

Ceaser Cipher is a substitution Cipher

True

False

Answer 1

1) What does Dk(Ek(P)) corresponds to?

A) plaintext

2)what is the goal of cryptanalysis?

A) Attempt to recognize patterns in encrypted messages.

3)what is the maximum possible keys in ceaser cipher?

A) 25 possible keys.For 26 alphabets the numbering is (0-25).

4) Choose all true for symmetric key?

A) Encryption and Decryption keys are same.

They are faster than asymmetric encryption.

The key distribution is effective.

5) ceaser cipher is a substitution cipher?

A) True

In which each letter in the plaintext is replaced by a letter some fixes number of position down to the alphabet.