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4 papers · 1 filter
A framework for covert and secret key expansion over quantum channels
Mehrdad Tahmasbi, Matthieu R. Bloch
Covert and secret quantum key distribution aims at generating information-theoretically secret bits between distant legitimate parties in a manner that remains provably undetectabl…
First and Second Order Asymptotics in Covert Communication
Mehrdad Tahmasbi, Matthieu R. Bloch
We study the first- and second-order asymptotics of covert communication over binary-input DMC for three different covertness metrics and under maximum probability of error constra…
Secret key generation from Gaussian sources using lattice hashing
Cong Ling, Laura Luzzi, Matthieu R. Bloch
We propose a simple yet complete lattice-based scheme for secret key generation from Gaussian sources in the presence of an eavesdropper, and show that it achieves strong secret ke…
Separation of Reliability and Secrecy in Rate-Limited Secret-Key Generation
Remi A. Chou, Matthieu R. Bloch
For a discrete or a continuous source model, we study the problem of secret-key generation with one round of rate-limited public communication between two legitimate users. Althoug…