Crypto 1

Question 1

What is Caesar cipher?

Answer 1

A Mono-alphabetic Cipher that shifts every letter by designated places.

Question 2

What is Symmetric Key Encryption?

Answer 2

Same Key locks and unlocks the encryption

The key and the data is used in an algorithm to create cipher text.

Relatively inexpensive in processing.

Question 3

What is Asymmetric key encryption?

Answer 3

A private key is used to create public key
public key is distributed
public key is used to encrypt the data

The cipher text can only be opened by the private key.

This method is often used to transfer a symmetric key.

Question 4

What is a protocol?

Answer 4

A protocol is a sequence of steps, involving one or more parties that are designed to complete a task.

(Sequence of steps)

Question 5

What does digital signature do?

Answer 5

Used to verify the content of message has not been manipulated.

Hashes coulb be usedm but the hashes could also be manipulated

Hashing is encrypted with public key

private key is then used to extract hash.