Cryptography

What is cryptography? Fill in the blank: Cryptography is the ______ of protecting information and communications through codes.

• science

• art

• method

• practice

What does the use of codes ensure? Fill in the blank: The use of codes ensures that only the ______ recipient can read and process the message.

• intended

• random

• unauthorised

• public

Match the following terms with their meanings: 1. Crypt 2. Graphy 3. Cryptography.

• writing

• c. hidden writing

• hidden

• a. writing

• hidden writing

• b. hidden

What are the different methods used for cryptography called?

• Codes

• Ciphers

• Algorithms

• Keys

What is a cipher?

• A system for creating a code

• A method for decoding

• A type of encryption key

• A random data generator

Plaintext is translated into encrypted unreadable ________.

• ciphertext

• plaintext

• text

• message

To anyone intercepting the communication, ciphertext will appear as ________.

• random data

• plain text

• encrypted key

• decoded message

To decipher a message, you need to know the _______ that has been used to encrypt it.

• method

• colour

• size

• shape

Cryptography is used to protect: Internet ______.

• security

• speed

• design

• access

Cryptography is used to protect: Confidential ______ e.g. emails, credit card transactions.

• information

• locations

• colours

• animals