Chalk Talk

The fairness puzzle that sparked probability

Chalk Talk

Astonishing discovery by computer scientist how to squeeze space into time

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The Problem with Finding Hay in a Haystack Everywhere but Nowhere

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Ranking Paradoxes, From Least to Most Paradoxical

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The Rational Numbers Are Not So Rational Everywhere but Nowhere

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Learning with errors Encrypting with unsolvable equations

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Lattice-based cryptography The tricky math of dots

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Post-quantum cryptography Security after Shor’s algorithm

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Messaging layer security Encrypting a group chat

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Double ratchet algorithm The ping-pong game encrypting Signal and WhatsApp

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