Encryption

How is data sent from computer to computer according to the text?

• Through wireless signals

• As pulses of light via long optical fibres

• Via satellite transmission

• Using radio waves

What is binary code made up of?

• A series of 1s and 0s, with 1 representing a pulse of light and 0 representing no light

• A series of random numbers

• A series of alphabetical characters

• A series of special symbols

What is the purpose of encryption in sending secret information through the internet?

• To speed up the data transfer

• To compress the data for storage

• To ensure only the right people can understand it

• To convert the data into binary code

What indicates that a website is secure and the information being sent or read is encrypted?

• The website starts with http://

• The website has a padlock icon in the address bar

• The website starts with https://

• The website ends with .com

What is the Atbash cipher equivalent of the word "hello"?

• svool

• olleh

• ebiil

• lloeh

Using the substitution cipher provided, what would "computer" translate to?

• xkrsziwv

• umepqyfg

• rqvgtbsf

• zogvkxuc

If the key for the Caesar cipher is +3, what would the word "safe" be encrypted as?

• vdiw

• vhdi

• pdqb

• whfk

Which cipher allows you to choose what letter each represents in the encryption process?

• Atbash cipher

• Substitution cipher

• Caesar cipher

• Transposition cipher

What is a key element to keep in mind when using ciphers to send secret messages?

• The message can only be sent once.

• Eavesdroppers can read your messages.

• The message must be in English.

• You can only use numbers in your message.