Cryptography as a field to foster interactions between mathematics and informatics, and algorithms. Analysis of a didactical situation
Résumé
We present the conception and analysis of a situation dealing with the principles of public-key
cryptography and aiming at exploring informatics and mathematical concepts and methods. We rely
on the Theory of Didactical Situations to design a situation (based on an unplugged activity) about
public-key cryptography using graphs. After the preliminary analysis of the content, we conceived a
didactical situation and developed its a priori analysis. The description of the associated solving
strategies illustrates the interplay between mathematics and informatics, and the role of algorithms
and algorithmic thinking.
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