Chiavi segrete (prima parte)
La matematica non è un problema 3
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Chiavi segrete (prima parte)
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Narrated by:
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Stefano Pasquero
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By:
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Stefano Pasquero
About this listen
Questa puntata è dedicata alla Crittografia, l'insieme di tecniche e stratagemmi che consentono di cifrare un messaggio o, viceversa, decifrare un messaggio "in codice"(ma i matematici dicono "cifrato"). In questa prima parte partiremo dalle tecniche crittografiche più antiche e arriveremo fino al famoso Codice Enigma, mostrando quanta Matematica può essere usata per cifrare e decifrare messaggi. Racconteremo come, almeno fino alla prima metà del secolo scorso, ossia fino a quando è stata efficace la cosiddetta Crittografia Simmetrica, la lotta fra i crittografi che cifrano il messaggio e i crittoanalisti che cercano di decifrarlo sia sempre stata incentrata sulla conoscenza della chiave di cifratura, quel segreto che dovrebbe essere noto soltanto a mittente e destinatario del messaggio.
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