A Lattice-Based Batch Identification Scheme

Rosemberg Silva (1) , Pierre-Louis Cayrel (2) , Richard Lindner (3)

1 UNICAMP - Universidade Estadual de Campinas = University of Campinas
2 LHC - Laboratoire Hubert Curien
3 Technische Universitat Darmstadt Fachbereich Informatik

This paper presents a batch version of the lattice-based identification scheme known as CLRS. Our version consists of a method for allowing a user to authenticate himself with different levels of clearance upon the choice of a subset of keys in his possession. It bears similarity with the Schnorr batch scheme, in the sense that the communication costs are kept constant, regardless of the number of keys involved. We use the hardness of a lattice problem, namely the Inhomogeneous Small Integer Solution problem (I-SIS), as security assumption.

Domaines: Cryptographie et sécurité [cs.CR]; Théorie de l'information et codage [math.IT]; Théorie de l'information [cs.IT]

Rosemberg Silva, Pierre-Louis Cayrel, Richard Lindner. A Lattice-Based Batch Identification Scheme. IEEE Information Theory Workshop (ITW 2011), Oct 2011, paraty, Brazil. pp.215 - 219. ⟨ujm-00664911⟩