A Novel Physical Layer Authenticated Encryption Protocol Exploiting Shared Randomness

Cornelius Saiki (1) , Arsenia Chorti (2, 3)

1 University of Essex
2 Princeton University
3 ENSEA - Ecole Nationale Supérieure de l'Electronique et de ses Applications

—The topic of physical layer authenticated encryp-tion using high rate key generation through shared randomness is investigated in this work. First, a physical layer secret key generation scheme is discussed exploiting channel reciprocity in wireless systems. In order to address the susceptibility of this family of schemes to active attacks, a novel physical layer authentication encryption protocol is presented along with its extension to multi-node networks in the presence of active adversaries. Secondly, in order to increase the key generation rate, a multi-level quantization algorithm with public feedback is discussed. It is demonstrated that the proposed scheme is superior to direct information distillation approaches and can substantially increase the key generation rates even at low and medium SNRs.

Domaines: Informatique [cs]; Théorie de l'information [cs.IT]; Cryptographie et sécurité [cs.CR]; Technologies Émergeantes [cs.ET]

Cornelius Saiki, Arsenia Chorti. A Novel Physical Layer Authenticated Encryption Protocol Exploiting Shared Randomness. IEEE CNS 2015, Sep 2015, Florence, Italy. ⟨hal-01686269⟩