2.4.4 Internet Security

Question 1

Encryption

Answer 1

Encryption the process of transforming data so that it cannot be understood.

During this process data is scrambled.
Called encryption key

Question 2

Why is encryption needed?

Answer 2

• a great deal of data is transmitted online needs to be protected against fraud.
• with encryption this data is transformed so will be meaningless without key
• encryption can also be used to scramble stored data.

Question 3

Public key

Answer 3

Method of encrypting data that uses same key to encrypt and decrypt.

Key can be used by both sender and receiver- public

Made available to everyone wishing to send encrypted details by having stored on publicly accessible directory on web server.

Each public has corresponding private- combination to decrypt data- unique mathematical relationship between them

Question 4

Private key

Answer 4

Receiver has

Remains confidential and is essential to decoding that data.