Sage Interactions - Cryptography - Under Construction

This page was be created at Sage Days 103 , 7-10 August 2019 by Sarah Arpin, Catalina Camacho-Navarro, Holly Paige Chaos, Amy Feaver, Eva Goedhart, Rebecca Lauren Miller, Alexis Newton, and Nandita Sahajpal.

If you have cryptography related interactions that you are interested in adding to this page, please do so. You can also contact Amy Feaver at firstname.lastname@kingsu.ca if you have interactions that you are interested in having us add to the page during Sage Days. We will consider them and add them in if we can!

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Shift Cipher

by Sarah Arpin, Alexis Newton

A classical cryptosystem that takes your text and shifts it through the alphabet by a given number of letters. -EG

xxxxxxxxxx

print "Put your message in quotes, and your desired shift: "

@interact

def shift_cipher(message = input_box(default="'secrets hi'", width = 50), shift=slider(0,25,1,3)):

    A = AlphabeticStrings()

    S = ShiftCryptosystem(A)

    message = S.encoding(message)

    C = S.enciphering(shift, message)

    print "Enciphered message:"

    print C

Affine Cipher

by Sarah Arpin, Alexis Newton

xxxxxxxxxx

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Substitution Cipher

by Catalina Camacho-Navarro

A simple cipher to encrypt messages in which each letter is assigned to another letter. Brute force or frequency analysis can be used to decrypt. -EG

xxxxxxxxxx

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Vigenère Cipher

by Holly Paige Chaos and Rebecca Lauren Miller

Using a secret key word, encrypt each letter by shifting it the corresponding letter in the key word. -EG

xxxxxxxxxx

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