Encryption Flashcards

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1
Q

Define encryption

A

Encoding a message so that only the sender and recipient can read it

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2
Q

Types of encryption

A

Symmetric encryption
Asymmetric encryption

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3
Q

Symmetric encryption

A

Encrypting data using a single key for both the sender and receiver

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4
Q

Aysymmetric encryption

A

A form of encryption using a public and private key

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5
Q

Public key

A

Encrypts the message (converts the message to cypher-text)

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6
Q

Private key

A

Decrypts the message (converts the cypher-text back into the message)

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7
Q

How does asymmetric encryption work

A
  • Sender encrypts the message using the public key
  • Receiver decrypts the message using the private key
  • The public key can not be used to decrypt a message
  • Both people must keep their private key to themselves

For 2 way communication both people must have their own private key and the other persons public key

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8
Q

Requirements for 2 way communication with asymmetric communication

A

Both people must have their own private key and the other persons public key

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9
Q

Faults with symmetric encryption

A
  • key is vulnerable to interception when being sent from sender to receiver
  • If 3rd party gets key , they can read all communication in both directions
  • Mathematical analysis can be used to decipher the code (looking at common letters)
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10
Q

Faults with aysymetric encryption

A

Tends to be prodcessor heavy
Is generally used to send a symmetric encryption key , after this symmetric encryption is used

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