Codes and Cyphers

An encryption key is used to help decrypt messages

• True
• False

Tags

CCSS.RI.4.10

CCSS.RI.5.10

CCSS.RI.6.4

CCSS.RI.7.4

CCSS.RI.8.4

Encryption is a way of 

• Securing Information on a network
• Securing Viruses
• Deleting applications
• Hacking Passwords

Tags

CCSS.RI.4.10

CCSS.RI.5.10

CCSS.RI.6.4

CCSS.RI.7.4

CCSS.RI.8.4

If you were to use a caeser cipher with a key of 3 shifts to the left, how would you encrypt the word: Cipher?

• ZAMEBO
• ZOMEBO
• ZFMEBO
• ZFMEBA

Taking a secret message and reproducing the original plain text is known as?

• Caesar Cipher

• Encryption

• Cipher Text

• Decryption

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

Tags

CCSS.L.1.5A

CCSS.L.1.5B

CCSS.L.K.5A

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

• DVSDULQV

• DOOFOHDU

• DOSKDEHW

• DORQHBHV

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.4.10

CCSS.RI.5.10

CCSS.RI.6.4

CCSS.RI.7.4

CCSS.RI.8.4

A Caesar cipher is an example of a ______________________.

• transposition cipher

• bimodal cipher

• substitution cipher

• substantial cipher

The following word was encrypted using a Caesar cipher with a shift of 2: ecguct. What word is it?

• julius

• caesar

• romans

• cipher

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

• FIFA

• HKHC

• EHEZ

• JMER