Shodor Education Foundation
Shodor Interactivate: Spy Game
Students will learn about modular arithmetic in order to decipher encrypted messages.
Shodor Education Foundation
Shodor Interactivate: Caesar Cipher
Create your own affine cipher for encoding and decoding messages. Input your own constant and multiplier, then input a message to encode.
Khan Academy
Khan Academy: Congruence Relation
A quick comprehension check over congruence relation.
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