Information-Theoretical Measures of Secure Information for Quantum Protocols in Space Applications

Information-Theoretical Measures of Secure Information for Quantum Protocols in Space Applications

Seminar author:Angeles Vázquez-Castro

Event date and time:12/05/2024 02:30:pm

Event location:Seminar Room, GIQ

Event contact:

Abstract:
The concept of secure information has evolved significantly from Shannon’s foundational principle of perfect secrecy to modern frameworks accommodating quantum phenomena. This talk begins by revisiting Shannon’s seminal work, followed by Wyner’s relaxation of perfect secrecy assumptions in the wiretap channel model, which introduced the notion of information-theoretic security in noisy channels. We then show how these notions were challenged by quantum cryptographers and present some of the proposed extensions to be used for security analysis of quantum cryptographic protocols. Finally, I present an illustrative example of the application of all this to the context of secure quantum communication in space and possible research directions.