1. Complete the sentences about symmetric encryption.

Use the terms from the list.

Some of the terms in the list will not be used. You should only use a term once.

• algorithm

• cipher

• copied

• delete

• key

• plain

• private

• public

• standard

• stolen

• understood

• unreadable

The data before encryption is known as .................................................. text. To scramble the data, an encryption .................................................., which is a type of .................................................., is used.

The data after encryption is known as .................................................. text. Encryption prevents the data from being .................................................. by a hacker.