WorksheetsY10 DGS - Computational Thinking Assessment
Total questions: 14
Worksheet time: 2hrs 30mins
Thinking about the problem
6. Use the Caesar Cipher to DECRYPT the following message:
QEB DFOI AXKZBP FK QEB OXFK
(a)
7. Use the Caesar Cipher to ENCRYPT the following message:
LIONS ARE CARNIVORES
(a)
8. Use the Vingenère Cipher to ENCRYPT the following message:
Plaintext: PLEASE HELP ME Key: CATS
WRITE your answer in CAPITALS.
(a)
9. Use the Vingenère Cipher to DECRYPT the following message: Encrypted text:
K AF KKNZAPG BF VHX JCIG
Key: CATS
Write your answer in CAPITALS.
(a)
10. Use the Pigpen Cipher to DECRYPT the message above the Pigpen cipher.
(a)
What is the main principle behind the Caesar Cipher?
The main principle is reversing the order of the alphabet.
The main principle is creating a random sequence of letters.
The main principle is letter substitution based on a fixed shift in the alphabet.
The main principle is using numbers instead of letters.
Taking a secret message and reproducing the original plain text is known as?
Caesar Cipher
Cipher Text
Encryption
Decryption
Definition of encryption
Using an algorithm and a key to convert message data into a form that is not understandable without that key.
Process of turning legible text into gobbledygook.
A method of trying to find the plain text from the cipher text without the decryption key.
Using an algorithm and a key to convert encrypted message data into its plain text equivalent.
Without a (a) one cannot decrypt an encrypted message.
