By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference...
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Transcript of By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference...
![Page 1: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/1.jpg)
Cryptography By Sunny Mahesh and Andy Yuwen
![Page 2: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/2.jpg)
What is Cryptography • Cryptography = Secret Messages = Cool Stuff• Ciphers• Difference between plaintext and ciphertext• Enciphering and Deciphering
![Page 3: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/3.jpg)
Substitution Ciphers
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Hill Ciphers • Hill Ciphers encode messages of plaintext in
successive pairs.• For a Hill n-cipher, pairs of length n are taken and
are enciphered by a n by n matrix•
![Page 5: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/5.jpg)
Hill Cipher Example Part 1•
![Page 6: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/6.jpg)
Hill Cipher Example Part 2•
![Page 7: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/7.jpg)
Hill Cipher Example Part 3•
![Page 8: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/8.jpg)
Modular Arithmetic
• A Cooler Way To Do Math
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Reciprocal Mods
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Inverse of a Matrix mod 26
• Why are we still doing this? Because we’re cool, Dealz with it
![Page 11: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/11.jpg)
Example of Inverse of a Matrix mod 26
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Decoding
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Decoding #hardcore#jamesbondstyle
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Decoding #hardcore#jamesbondstyle
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![Page 15: By Sunny Mahesh and Andy Yuwen. Cryptography = Secret Messages = Cool Stuff Ciphers Difference between plaintext and ciphertext Enciphering and Deciphering.](https://reader036.fdocuments.in/reader036/viewer/2022062620/551b8d12550346a10a8b5777/html5/thumbnails/15.jpg)
Decoding #hardcore#jamesbondstyle#2
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Decoding #theeasypart#3
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Mission Accomplished, JK
• OK. Now Its Your Time Secret Agents. Complete the final mission and receive your award.
• We have intercepted the code