Caesar Cipher

Convert "GJGB" cipher-text back into plain text using the key: 1

• FIFA

• HKHC

• EHEZ

• JMER

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

Tags

CCSS.RI.11-12.4

CCSS.RI.7.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RI.9-10.4

Encrypt the word alphabet using a Caesar cipher with a shift of 3

• DVSDULQV

• DOOFOHDU

• DOSKDEHW

• DORQHBHV

A Caesar cipher is an example of a ______________________.

• transposition cipher

• bimodal cipher

• substitution cipher

• substantial cipher

What is encryption?

• When you put data / text into code making it difficult to read or understand.
• A secret or disguised way of writing; a code.
• A formal language designed to communicate instructions to a machine
• What is put in, taken in, or operated on by any process or system.

In Cryptography, the original message, before being transformed, is called

• Simple Text

• Plain Text

• Cipher Text

• Filled Text

The key for a random substitution cipher is 

• a number
• an alphanumeric string
• a mapping of the letters of the alphabet to other letters
• two keys, a public and a private

Who was the first know user of the Caesar Cipher?

• Caesar Romanus

• Julius Caesar

• Alan Turing

• There isn't one

Tags

CCSS.L.1.5A

CCSS.L.1.5B

CCSS.L.K.5A

Which of these is the most secure way of data transfer?

• HTTP
• HTTPS

An encryption key is used to help decrypt messages

• True
• False