encryption

Question 1

how does encryption work on text

Answer 1

before encryption it is plain text
text is encrypted using algorithm
text is encrypted using key (this text is called cypher text) 
key is transmitted separately from text
key is used to decrypt the cypher text

Question 2

what is asymmetric encryption

Answer 2

both private and public key are needed
public key is given to everyone and private key is only known to the user
encryption keys are generated by a hashing algorithm

Question 3

what is authentication

Answer 3

it is used to verify that data comes from a trusted source

Question 4

what is symmetric encryption

Answer 4

it uses a secret key that can be a combination of characters (the longer the length of the key is, the more strong the encryption is)
if this key is applied to a message, its content is changed

Question 5

what is hashing algorithm

Answer 5

takes key and translates it into a string of characters (in hex notation)

Question 6

what are DoS (Denial of Service) attacks

Answer 6

when large number of requests are sent to the server at once

Question 7

what are DoS attacks designed to do

Answer 7

designed to flood a server with useless traffic and the server will come to a stop to deal with this attack. This prevents users gaining access to the web server

Question 8

what does encryption do?

Answer 8

used to protect data in case it is hacked however it doesn’t prevent hacking, it just makes data meaningless

Question 9

what are the keys in symmetric encryption used for?

Answer 9

one key is used to encrypt message

one key is used to decrypt message