Secret key generation over noisy channels with common randomness

German Bassi (1) , Pablo Piantanida (1) , Shlomo Shamai (2)

1 L2S - Laboratoire des signaux et systèmes
2 EE-Technion - Department of Electrical Engineering - Technion [Haïfa]

This paper investigates the problem of secret key generation over a wiretap channel when the terminals have access to correlated sources. These sources are independent of the main channel and the users observe them before the transmission takes place. A novel achievable scheme for this model is proposed and is shown to be optimal under certain less noisy conditions. This result improves upon the existing literature where the more stringent condition of degradedness was needed.

Domaines: Théorie de l'information [cs.IT]; Réseaux et télécommunications [cs.NI]; Théorie de l'information et codage [math.IT]; Statistiques [math.ST]

German Bassi, Pablo Piantanida, Shlomo Shamai. Secret key generation over noisy channels with common randomness. 2016 IEEE International Symposium on Information Theory (ISIT), Jul 2016, Barcelona, Spain. ⟨10.1109/ISIT.2016.7541351⟩. ⟨hal-01436842⟩