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Network investigations - COMP40110 > Encryption > Flashcards

Flashcards in Encryption Deck (7)
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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