2.3 Encryption

Question 1

What is encryption?

Answer 1

a method of securing data for storage or transmission that scrambles it and makes it meaningless

Question 2

What is the name given to data BEFORE encryption?

Answer 2

Plain text

Question 3

What is the name given to data AFTER encryption?

Answer 3

Cipher tex

Question 4

What is the encryption key?

Answer 4

a type of algorithm that is used to encrypt data

Question 5

What are the two main methods of encryption?

Answer 5

Symmetric and Asymmetric

Question 6

State the process for Symmetric encryption.

Answer 6

The process for symmetric encryption is:

Plain text is encrypted into cypher text using a encryption key

The cipher text and the encryption key are then sent separately to the receiving device

The same key is then used to decrypt the cipher text back into plain text form

Question 7

State the process for Asymmetric encryption.

Answer 7

The process for symmetric encryption is:

Plain text is encrypted into cypher text using a public key.

The cipher text is transmitted into the receiving device

the cipher text cannot be decrypted using the public key, it is decrypted using a private key