encryption

why is encryption needed

becuase when data is travelling through a network it prevents the data from being

• intercepted

• read

• modified

• stolen

how does encryption work

data is converted into an unreadable form, only someone with the correct key is able to covert it back to readable form

what are the types of data encryption

symmetric encryption

asymmetric encryption

what is symmetric encryption and how does it work

when a key is used to do both encrypt and decrypt the data

• sender encrypts the data using the key, also giving the receiver the key.

• Receiver uses that key to decrypt the data.

what are the advantages and disadvantages of asymmetric encryption

advantages

• fast

• suitable for encrypting large amounts of data

disadvantages

• key must be shared between sender and receiver

• the key can be intercepted whilst trying to be sent to the receiver.

what is asymmetric encryption and how does it work

where two keys is used: public and private key

public key is shared to everyone

private key is kept to the owner only.

• sender encrypts the data using the receivers public key

• the receiver uses its own private key to decrypt the data

what are the advantages and disadvantages of asymmetric encryption

advantages

• no need to share keys

• more secure

disadvantages

• slower the symmetric encryption