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WorksheetsEncryption
Total questions: 13
Worksheet time: 3mins
A word has been encrypted with a Caesar cipher to CBU. The key used was 1. What was the original word?
abc
3
Bat
one
When I encrypt a message, I change plain text to
(a)
When we convert numbers to binary we use the digits____?
0 and 1
1, 10, 100, 1000 etc.
1, 2, 4, 8, 16
5, 10, 15, 20
What is the algorithm of ceasar's cipher?
Each letter is replaced with a particular symbol
Each letter is replaced with a letter a certain number of steps down the alphabet
Each letter is replaced with a particular number from 0 to 26, and numbers are replaced with letters.
Each letter is replaced with a completely random number
What would the encryption look like using the key?
None of them
Alan Turing helped decrypt codes that helped during which era?
The Plague
Word War 2
The 1980s
The Millennium
Alan Turing helped decrypt coded messages from the Germans. What was the name of the machine he tried to decrypt messages from?
Enigma
London Bridge
ENIAC
Apple Mac
What is the denary value of this binary representation?
26
5
11
101
Which picture has a denary value of 18?
Thumb up
Turtle
Boy running
Bike
Using a Caesar cipher, I have converted the word Happy to KDSSB. What key have I used? (Type it as a digit)
(a)
When I convert our number system into a series of 1s and 0s for use in a computer, I have converted it to (a) ?
