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WorksheetsCryptography (Y8)
Total questions: 17
Worksheet time: 15mins
A cipher is _________________________.
a person who makes up secret codes
an algorithm that is used to scramble text so that it can be passed in secret
a lock that can be used to lock a message in a lock box
any puzzle, such as a crossword or Sudoku puzzle
Who was the first known user of the Caesar Cipher?
Caesar Romanus
Julius Caesar
Alan Turing
There isn't one
In Cryptography, the original message, before being transformed, is called
Simple Text
Plain Text
Cipher Text
Filled Text
An encryption algorithm transforms plain text into:
Cipher text
Simple Text
Empty Text
Plain Text
_______ is the science and art of transforming messages to make them secure and immune to attacks.
Cryptography
Cryptoanalysis
neither Cryptography nor Cryptoanalysis
either Cryptography or Cryptoanalysis
A(n) ______ algorithm transforms cipher text to plain text.
Encryption
Decryption
A Caesar cipher is an example of a ______________________.
transposition cipher
bimodal cipher
substitution cipher
substantial cipher
Encrypt the word alphabet using a Caesar cipher with a shift of 3
DVSDULQV
DOOFOHDU
DOSKDEHW
DORQHBHV
The process of converting a ciphertext into plaintext.
encryption
decryption
plaintext
cryptography
The following word was encrypted using a Caesar cipher with a shift of 2: ecguct. What word is it?
julius
caesar
romans
cipher
The _______ is a number or a set of numbers on which the cipher operates.
secret
cipher
key
none of the mentioned
By encrypting "Hello world" using a rail fence cipher of size 3, the output will be:
LDWORLO_HEL
HLWLEOODL_R
HORE_LLWDLO
LOLWDE_LHOR
A method for determining a solution to a problem by sequentially testing all possible solutions.
brute force
relative frequency
cipher
paired keys
What was the name of the man who led the team that cracked the German's "Enigma Code" in WW2?
Tim Berners-Lee
Alan Turing
Stephen Hawking
Bill Gates
A 4X5 matrix cipher was used to encrypt "good morning everyone". What will it be output?
GMIVOOONENORGREDNEY
GOGYOREOONVNDIEEMNR
GDRNVYEOMNGEOOOIERN
