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Relativity, Quantum Theory and Cryptography

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  • UserProfessor Adrian Kent, Department of Applied Mathematics and Theoretical Physics, University of Cambridge World_link
  • ClockFriday 01 June 2018, 17:45-19:10
  • HouseWolfson College, Gatsby Room.

If you have a question about this talk, please contact Benjamin Pingault.

The goal of cryptography is to control access to information. For example, we may want a secret message to be readable by allies but not by adversaries, or an encrypted prediction to be unveiled only if we choose to supply a key.

In recent decades, we learned how to use fundamental physical laws to guarantee cryptographic security. Quantum cryptography exploits the distinctive properties of information encoded in quantum systems, such as atoms or weak light pulses. 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 Wolfson College Science Society series.

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