Cryptography is a security measure that...

• allows untrusted or unintended middlepersons to view information

• allows the copying of information that is sent between two people

• does not allow untrusted or unintended middlepersons to view information

• deletes information that is sent between two people

Plaintext is the...

• encrypted message

• the modified message

• decrypted message

• the original message

Cipher text is…

• the result of encryption performed on plaintext

• a group conversation between several people

• the result of decryption performed on plaintext

• a conversation between two people

If a middle man reads the ciphertext, would it make sense

without the decryption key?

• Yes

• No

Using the decryption key presented in the image, the word "dog" will be written as:

• 4 15 16

• 4 21 10

• 4 21 17

• 4 21 16

Radars use _______ waves

• air

• radio

• sound

• sea

During WWII, radars were used by planes...

• to identify bombing targets

• to send messages to their enemies

• to locate birds in the sky

• to exchange messages between aircrafts

Today, radars are used in... (SELEC THREE [3] ANSWERS)

• air travel

• sea travel

• on land

• at school

The Enigma Machine was used by the Germans in WWII...

• to encrypt and decrypt messages sent by telephone

• to encrypt and decrypt messages sent by telegraph

• to send cryptographic keys by telegraph

• to send rotor settings by telephone

What was used to input letters onto the Enigma Machine?

• A mouse

• A pencil

• Rotors and gears

• A typewriter keyboard