Your Cipher – Clwk 9/6/2018 – Cryptography
Due 09/11, 6:45 PM
Instructions
‘3. Design your own cipher and a device to easily encrypt and decrypt messages.
Describe your cipher. Draw a diagram for your device. Build your device. Type here decryption instructions.
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- Friend’s Cipher – Cryptography
Find a classmate and exchange ciphers, instructions and encrypted message. After you checked with your classmate that you were able to decrypt the message, comment on the following: Efficiency of the cipher Quality of the instructions
NOTE: If the instructions were not clear or you couldn’t follow them, help your classmate make the right changes. Include the name of your classmate.
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- Brute Force – Cryptography
If you didn’t have a key to decipher an encrypted message, how would write a program to decrypt it?
Write the pseudocode for you decrypting program using brute force.
Submit the instructions for your encryption device in the corresponding post. Include your name in the instructions.
Print your instructions and attach it to your device. I will “glue/attach” it to a poster. Please hand everything with your name on it.
De-Crypt: Caesar Cipher – Clwk 9/6/2018 – Cryptography
Due 09/06, 6:45 PM
Instructions
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- In this post type your partner’s encrypted message and the one piece of information needed to decrypt it. What is the message?
NOTE: Include your partner’s name
En-Crypt: Caesar Cipher – Clwk 9/6/2018 – Cryptography
Due 09/06, 6:45 PM
Instructions
https://java.mrseliasclasses.org/cryptography-caesar-cipher/
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- Use the “cipherwheel” to encrypt a message. In a piece of paper, share the encrypted message with a partner. In this post, you will type the message, the encrypted message and the one piece of information needed for your partner to decrypt it.
NOTE: Include your partner’s name Yours should be at the top.
Submit here both messages from you: the encrypted and the decrypted from your partner.
What do you need to tell your partner to be able to decrypt the message?
Encryption and Decryption Hand-written Example
Due 09/11, 6:45 PM
Instructions
Hand-in the paper(s) with your english sentence and the encrypted version for your partner. And, the encrypted sentence from your partner and the english version of it.
Information entropy | Journey into information theory | Computer Science | Khan Academy
https://www.youtube.com/watch?v=2s3aJfRr9gE
Shannon Entropy and Information Gain
https://www.youtube.com/watch?v=9r7FIXEAGvs
https://www.youtube.com/watch?v=9r7FIXEAGvs&t=57s
Entropy in Compression – Computerphile
https://www.youtube.com/watch?v=M5c_RFKVkko
Your Cipher – Clwk 9/6/2018 – Cryptography
Due 09/11, 6:45 PM
Instructions
‘3. Design your own cipher and a device to easily encrypt and decrypt messages.
Describe your cipher. Draw a diagram for your device. Build your device. Type here decryption instructions.
-
- Friend’s Cipher – Cryptography
Find a classmate and exchange ciphers, instructions and encrypted message. After you checked with your classmate that you were able to decrypt the message, comment on the following: Efficiency of the cipher Quality of the instructions
NOTE: If the instructions were not clear or you couldn’t follow them, help your classmate make the right changes. Include the name of your classmate.
-
- Brute Force – Cryptography
If you didn’t have a key to decipher an encrypted message, how would write a program to decrypt it?
Write the pseudocode for you decrypting program using brute force.
Submit the instructions for your encryption device in the corresponding post. Include your name in the instructions.
Print your instructions and attach it to your device. I will “glue/attach” it to a poster. Please hand everything with your name on it.
De-Crypt: Caesar Cipher – Clwk 9/6/2018 – Cryptography
Due 09/06, 6:45 PM
Instructions
-
- In this post type your partner’s encrypted message and the one piece of information needed to decrypt it. What is the message?
NOTE: Include your partner’s name
En-Crypt: Caesar Cipher – Clwk 9/6/2018 – Cryptography
Due 09/06, 6:45 PM
Instructions
https://java.mrseliasclasses.org/cryptography-caesar-cipher/
-
- Use the “cipherwheel” to encrypt a message. In a piece of paper, share the encrypted message with a partner. In this post, you will type the message, the encrypted message and the one piece of information needed for your partner to decrypt it.
NOTE: Include your partner’s name Yours should be at the top.
Submit here both messages from you: the encrypted and the decrypted from your partner.
What do you need to tell your partner to be able to decrypt the message?
Encryption and Decryption Hand-written Example
Due 09/11, 6:45 PM
Instructions
Hand-in the paper(s) with your english sentence and the encrypted version for your partner. And, the encrypted sentence from your partner and the english version of it.
Information entropy | Journey into information theory | Computer Science | Khan Academy
https://www.youtube.com/watch?v=2s3aJfRr9gE
Shannon Entropy and Information Gain
https://www.youtube.com/watch?v=9r7FIXEAGvs
https://www.youtube.com/watch?v=9r7FIXEAGvs&t=57s