1.3.1 encryption

Question 1

What is encryption?

Answer 1

• Encryption is the process used to keep data secure when is transmitted.

Question 2

What are the two types of encryption?

Answer 2

• symmetric encryption.
• asymmetric encryption.

Question 3

Symmetric encryption

Answer 3

in symmetric encryption the sender and receiver share the same private key, which they exchange, the private key is used to encrypt and decrypt the msg.

Question 4

drawbacks of symmetric encryption.

Answer 4

If the private key gets intercepted during key exchange then any communication sent can be intercepted and decrypted.

Question 5

Asymmetric encryption.

Answer 5

• two keys are used, one private and one public.
• the sender uses the receivers public key to encrypt the msg, then the receiver uses their private key to decrypt the msg.

Question 6

how to prove that a msg has been sent by you.

Answer 6

you can encrypt the msg using your own private key, this means that every one can decrypt it using your own public key.