Seminar: The Jacob Ziv Communication and Information Theory seminar
Secure Communication With Unreliable Entanglement Assistance: Interception and Loss
Date:
June,05,2025
Start Time:
14:30 - 15:30
Location:
1061, Meyer Building
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Lecturer:
Meir Lederman
Research Areas:
| Security poses a pivotal challenge in modern communication networks. In quantum communication, entanglement is a key enabler of enhanced performance and secrecy. However, entanglement is a fragile resource—difficult to generate and susceptible to loss —which raises fundamental questions about how to communicate securely when entanglement cannot be fully trusted. We consider secure communication over the quantum wiretap channel with unreliable entanglement assistance, arising from one of two scenarios: interception by an adversary or passive loss to the environment. The core idea is to adapt the transmission rate to the availability of entanglement, without relying on feedback or repetition, while maintaining security guarantees. We analyze both scenarios and derive achievable rate regions. In the passive model, we derive a multi-letter secrecy capacity formula for general channels, and in the interception model, for the special class of degraded channels. As an example, we consider the amplitude-damping channel. Under interception, time division is not necessarily possible, and the boundary of our achievable region is disconnected.
M.Sc. student under the supervision of Prof. Uzi Pereg.
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