2.3 encryption

Question 1

what is plain text

Answer 1

text that is not encrypted

Question 2

what is cipher text

Answer 2

text that has been encrypted

Question 3

what are the types of encryption

Answer 3

symmetric, asymmetric

Question 4

what is a key

Answer 4

rules used to encrypt text

Question 5

how does symmetric encryption work

Answer 5

• one key for encryption and decryption
• sending computer must send both encrypted message and key

Question 6

how does asymmetric encryption work

Answer 6

• 2 separate keys for encryption and decryption
• public key: visible to all computers that want to exchange encrypted message
• private key: only receiver has it for encryption
• sender uses recipients public key to encrypt
• receiver uses private key to decrypt

Question 7

symmetric vs asymmetric encryption

Answer 7

• asymmetric more reliable
• symmetric simple and straightforward (if malicious user intercepts key, they can read message)