Quantum oblivious transfer is secure against all individual measurements

Author

Mayers, D. ; Salvail, L.

Author_Institution

Dept. d´´Inf. et de Recherche Oper., Montreal Univ., Que., Canada

fYear

1994

fDate

17-20 Nov 1994

Firstpage

69

Lastpage

77

Abstract

Shows that the BBCS-protocol (Bennett, Brassard, Cre´peau and Skubiszewska, CRYPTO´91, 1992) implementing one of the most important cryptographic primitives-`oblivious transfer´-is secure against any individual measurement allowed by quantum mechanics. We analyze the common situation where successive measurements on the same photon could be used to cheat in the protocol. We model this situation by using a single inner-product-preserving (IPP) operator, followed by a complete composite-outcome Von Neumann measurement. A lower bound on the residual collision entropy is then obtained under the assumption that only individual measurements can be performed. This bound is used to apply privacy amplification techniques in order to conclude the security of the BBCS-protocol

Keywords

cryptography; data privacy; entropy; information theory; protocols; quantum theory; BBCS-protocol; cheating; complete composite-outcome Von Neumann measurement; cryptographic primitives; individual measurements; inner product preserving operator; photon measurements; privacy amplification techniques; quantum mechanics; quantum oblivious transfer; residual collision entropy; security; successive measurements; Cryptographic protocols; Cryptography; Entropy; Information security; Information theory; Mechanical variables measurement; Polarization; Privacy; Prototypes; Quantum mechanics;

fLanguage

English

Publisher

ieee

Conference_Titel

Physics and Computation, 1994. PhysComp '94, Proceedings., Workshop on

Conference_Location

Dallas, TX

Print_ISBN

0-8186-6715-X

Type

conf

DOI

10.1109/PHYCMP.1994.363696

Filename

363696