Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B34: Quantum Thermodynamics I
11:30 AM–2:30 PM,
Monday, March 15, 2021
Sponsoring
Unit:
DQI
Chair: Mohammad Ansari, Forschungszentrum Julich
Abstract: B34.00011 : Cryptography based on Landauer's principle*
1:30 PM–1:42 PM
Live
Presenter:
Xavier Coiteux-Roy
(Università della Svizzera italiana (USI))
Authors:
Xavier Coiteux-Roy
(Università della Svizzera italiana (USI))
Stefan Wolf
(Università della Svizzera italiana (USI))
We define a theoretical model — a classical-information world in which exponentially large randomized memories are accessible, and reversible computation is effortless, but free energy is severely limited — and present in its context an information-theoretically secure protocol for 1-out-of-2 oblivious transfer. Its security follows directly from Landauer’s principle (which states that the erasure cost of 1 bit of information is at least kB T ln 2 J/K). Oblivious transfer is an important cryptographic primitive because it can be used as a subroutine to achieve any multi-party computation task securely.
*Supported by the Swiss National Science Foundation (SNF) and the Fonds de recherche du Québec – Nature et technologies (FRQNT).
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