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Quantum Theory, Relativity and Cryptography

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  • UserProfessor Adrian Kent, DAMTP, University of Cambridge World_link
  • ClockWednesday 26 February 2020, 19:30-20:30
  • HouseTBC.

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A Wikipedia article on our speaker: https://en.wikipedia.org/wiki/Adrian_Kent

The goal of cryptography is to control access to information. For example, we may want a secret message to be readable by selected allies but not by adversaries, or an encrypted prediction to be unveiled only if we choose to supply a key. In recent decades, we have discovered how to use fundamental physical laws to guarantee cryptographic security. Quantum cryptography exploits the distinctive properties of information encoded in quantum systems, while relativistic cryptography uses the fact that information cannot be sent faster than light speed. I will show how some simple but perfectly secure cryptosystems can be built using these principles and describe the current state of the art of physics-based cryptography.

This talk is part of the Cambridge University Physics Society series.

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