Encryption Flashcards
1
Q
Why use encryption?
A
- Confidentiality
- Authentication
- Integrity
- Cant deny message sent
2
Q
What is encryption?
A
Process of encoding a message so that anyone who intercepts it cannot read it
3
Q
What 3 things are required to encrypt a message?
A
- A message
- encryption algorithm
- A key
4
Q
What is an encryption key?
A
A piece of information that is used with the encryption algorithm to turn the plaintext into the cyphertext
5
Q
What is secret key encryption?
A
The same key is used to encrypt and decrypt the message.
Both communicating parties must have the key
6
Q
What are the issues with secret key encryption?
A
Both users need to have the key.
Needs to be arranged an offline way to get the key to each other.
7
Q
What is public key encryption?
A
Two keys are used:
Public key used to encryt the message.
Private key used to decryt the message
