Binary and Logic L7 - Caesar Cipher Encryption

Last updated about 1 year ago

17 questions

Binary and Logic L7 - Caesar Cipher Encryption

Last updated about 1 year ago

17 questions

Lesson intentions
To know that text can be protected using “encryption”
Success Criteria:
1: Be know that encryption turns plain text into cipher text
2: To be able to encrypt and decrypt messages
3: To be aware of disadvantages of using the caesar cipher. 

Caesar Cipher: A method of "Encrypting" messages by "Shifting" the alphabet by a certain amount.

Encryption:
Turning "plain text" into "Cipher text". This makes it so that people without the "key" cannot understand it.

Decryption:
Turning "Cipher Text" into "Plain text"

Key: The method in encrypting and decrypting. Only you and the person you are sharing with should know this key.

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Bye".

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Hfjxfw Hnumjw
Key: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Mr Chau
Key: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Em apitt uizkp ib liev.
Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Ovanel naq Ybtvp
Key: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Caesar Cipher
Key: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Password
Key: 17

What is a disadvantage of using the Caesar Cipher?

Create your own secret message

https://cryptii.com/pipes/caesar-cipher

Go onto
https://learncomputing.org/binary
and do some revision for converting binary to denary or vise versa
or some binary addition.
Screenshot your progress.

Draggable item		Corresponding Item
Decryption		Shifting the alphabet by a certain key
Key

Binary and Logic L7 - Caesar Cipher Encryption

Binary and Logic L7 - Caesar Cipher Encryption

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Bye".

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Hfjxfw Hnumjw
Key: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Mr Chau
Key: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Em apitt uizkp ib liev.
Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Ovanel naq Ybtvp
Key: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Caesar Cipher
Key: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Password
Key: 17

What is a disadvantage of using the Caesar Cipher?

Create your own secret message

https://cryptii.com/pipes/caesar-cipher

Go onto
https://learncomputing.org/binary
and do some revision for converting binary to denary or vise versa
or some binary addition.
Screenshot your progress.

Match the keyword to the definition

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Hello".

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Bye".

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Decrypt the message "phulw"

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Hfjxfw Hnumjw
Key: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Mr Chau
Key: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Em apitt uizkp ib liev.
Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Ovanel naq Ybtvp
Key: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Caesar Cipher
Key: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Password
Key: 17

What is a disadvantage of using the Caesar Cipher?

Create your own secret message

https://cryptii.com/pipes/caesar-cipher

Go onto
https://learncomputing.org/binary
and do some revision for converting binary to denary or vise versa
or some binary addition.
Screenshot your progress.

Match the keyword to the definition

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to ENCRYPT the letter A, it moves 3 spaces to the right. You look at the outer ring then replace it with the letter in the inside ring.
What does the letter A turn into?

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to ENCRYPT the letter B, it moves 3 spaces to the right. You look at the outer ring then replace it with the letter in the inside ring.

What does the letter B turn into?

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Hello".

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to DECRYPT the letter D, you look for this letter in the inner circle, then use the letter on the blue ring.

What does D decrypt to?

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to DECRYPT the letter E, you look for this letter in the inner circle, then use the letter on the blue ring.

What does D decrypt to?

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Decrypt the message "phulw"

Draggable item		Corresponding Item
Decryption		Shifting the alphabet by a certain key
Key		Turning "plain text" into "Cipher text".
Caesar Cipher		Turning "Cipher Text" into "Plain text"
Encryption:		How much you shift the alphabet by to decrypt and encrypt
Cipher text		An encrypted message

Binary and Logic L7 - Caesar Cipher Encryption

Binary and Logic L7 - Caesar Cipher Encryption

The Image shows a Caesar Cipher wheel. It has a key of 3.You look at the outer ring then replace it with the letter in the inside ring.Encrypt the message "Bye".

Use the website: https://caesar-cipher.com/caesar-cipher-wheelWork out my secret message: Hfjxfw HnumjwKey: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheelEncrypt the message: Mr ChauKey: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheelWork out my secret message: Em apitt uizkp ib liev.Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheelWork out my secret message: Ovanel naq YbtvpKey: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheelEncrypt the message: Caesar CipherKey: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheelEncrypt the message: PasswordKey: 17

What is a disadvantage of using the Caesar Cipher?

Create your own secret messagehttps://cryptii.com/pipes/caesar-cipher

Go onto https://learncomputing.org/binaryand do some revision for converting binary to denary or vise versaor some binary addition.Screenshot your progress.

Match the keyword to the definition

The Image shows a Caesar Cipher wheel. It has a key of 3.You look at the outer ring then replace it with the letter in the inside ring.Encrypt the message "Hello".

The Image shows a Caesar Cipher wheel. It has a key of 3.You look at the outer ring then replace it with the letter in the inside ring.Encrypt the message "Bye".

The Image shows a Caesar Cipher wheel. It has a key of 3.You look at the outer ring then replace it with the letter in the inside ring.Decrypt the message "phulw"

Use the website: https://caesar-cipher.com/caesar-cipher-wheelWork out my secret message: Hfjxfw HnumjwKey: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheelEncrypt the message: Mr ChauKey: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheelWork out my secret message: Em apitt uizkp ib liev.Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheelWork out my secret message: Ovanel naq YbtvpKey: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheelEncrypt the message: Caesar CipherKey: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheelEncrypt the message: PasswordKey: 17

What is a disadvantage of using the Caesar Cipher?

Create your own secret messagehttps://cryptii.com/pipes/caesar-cipher

Go onto https://learncomputing.org/binaryand do some revision for converting binary to denary or vise versaor some binary addition.Screenshot your progress.

Match the keyword to the definition

The Image shows a Caesar Cipher wheel. It has a key of 3.So to ENCRYPT the letter A, it moves 3 spaces to the right. You look at the outer ring then replace it with the letter in the inside ring.What does the letter A turn into?

The Image shows a Caesar Cipher wheel. It has a key of 3.So to ENCRYPT the letter B, it moves 3 spaces to the right. You look at the outer ring then replace it with the letter in the inside ring.What does the letter B turn into?

The Image shows a Caesar Cipher wheel. It has a key of 3.You look at the outer ring then replace it with the letter in the inside ring.Encrypt the message "Hello".

The Image shows a Caesar Cipher wheel. It has a key of 3.So to DECRYPT the letter D, you look for this letter in the inner circle, then use the letter on the blue ring.What does D decrypt to?

The Image shows a Caesar Cipher wheel. It has a key of 3.So to DECRYPT the letter E, you look for this letter in the inner circle, then use the letter on the blue ring.What does D decrypt to?

The Image shows a Caesar Cipher wheel. It has a key of 3.You look at the outer ring then replace it with the letter in the inside ring.Decrypt the message "phulw"

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Bye".

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Hfjxfw Hnumjw
Key: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Mr Chau
Key: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Em apitt uizkp ib liev.
Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Ovanel naq Ybtvp
Key: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Caesar Cipher
Key: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Password
Key: 17

Create your own secret message

https://cryptii.com/pipes/caesar-cipher

Go onto
https://learncomputing.org/binary
and do some revision for converting binary to denary or vise versa
or some binary addition.
Screenshot your progress.

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Hello".

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Bye".

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Decrypt the message "phulw"

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Hfjxfw Hnumjw
Key: 5

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Mr Chau
Key: 7

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Em apitt uizkp ib liev.
Key: 8

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Work out my secret message: Ovanel naq Ybtvp
Key: 13

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Caesar Cipher
Key: 17

Use the website: https://caesar-cipher.com/caesar-cipher-wheel

Encrypt the message: Password
Key: 17

Create your own secret message

https://cryptii.com/pipes/caesar-cipher

Go onto
https://learncomputing.org/binary
and do some revision for converting binary to denary or vise versa
or some binary addition.
Screenshot your progress.

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to ENCRYPT the letter A, it moves 3 spaces to the right. You look at the outer ring then replace it with the letter in the inside ring.
What does the letter A turn into?

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to ENCRYPT the letter B, it moves 3 spaces to the right. You look at the outer ring then replace it with the letter in the inside ring.

What does the letter B turn into?

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Encrypt the message "Hello".

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to DECRYPT the letter D, you look for this letter in the inner circle, then use the letter on the blue ring.

What does D decrypt to?

The Image shows a Caesar Cipher wheel. It has a key of 3.

So to DECRYPT the letter E, you look for this letter in the inner circle, then use the letter on the blue ring.

What does D decrypt to?

The Image shows a Caesar Cipher wheel. It has a key of 3.

You look at the outer ring then replace it with the letter in the inside ring.

Decrypt the message "phulw"