Unit 2.3 - Encryption

Question 1

why do we use encryption?

Answer 1

-minimises risk of being intercepted
-unreadable to whoever intercepts data

Question 2

plaintext?

Answer 2

original data being sent

Question 3

ciphertext?

Answer 3

plaintext after it has gone through an encryption algorithm

Question 4

symmetric encryption

Answer 4

uses the same encryption key to encrypt and decrypt the encoded message

Question 5

asymmetric encryption

Answer 5

uses public and private key

Question 6

public key

Answer 6

available to everybody (encrypts)

Question 7

private key

Answer 7

only the computer user knows (decrypts)

Question 8

how does asymmetric encryption work?

Answer 8

1) Matching keys are made
2) A sends their public key to B
3) B uses A’s public key to encrypt document being sent
4) B sends encrypted document to A
5) A uses private key to decrypt the document