A Formal Study of the Privacy Concerns in Biometric-Based Remote Authentication Schemes

With their increasing popularity in cryptosystems, biometrics have attracted more and more attention from the information security community. However, how to handle the relevant privacy concerns remains to be troublesome. In this paper, we propose a novel security model to formalize the privacy concerns in biometric-based remote authentication schemes. Our security model covers a number of practical privacy concerns such as identity privacy and transaction anonymity, which have not been formally considered in the literature. In addition, we propose a general biometric-based remote authentication scheme and prove its security in our security model

An Application of the Boneh and Shacham Group Signature Scheme to Biometric Authentication

The original publication is available at www.springerlink.comInternational audienceWe introduce a new way for generating strong keys from biometric data. Contrary to popular belief, this leads us to biometric keys which are easy to obtain and renew. Our solution is based on two-factor authentication: a low-cost card and a biometric trait are involved. Following the Boneh and Shacham group signature construction, we introduce a new biometric-based remote authentication scheme. Surprisingly, for ordinary uses no in- teractions with a biometric database are needed in this scheme. As a side effect of our proposal, privacy of users is easily obtained while it can possibly be removed, for instance under legal warrant

Zero Knowledge Watermark Detection

. In order for digital watermarking technology to be truly usable, one must be able to employ it without annihilating its effect. The act of revealing a watermark within an object, in order to prove ownership or detect theft of said object, may open the door to subsequent theft, by providing attackers with the information they need to remove the watermark. The idea of zero-knowledge watermarking, of proving the existence of a mark without revealing what that mark is, can help address this problem and others. 1 Introduction 1.1 The Problem Digital watermarking has been proposed as a solution to a number of media security problems. Robust digital watermarks, designed to survive within a media object unless an unreasonable amount of damage has been inflicted upon it, or unless an unreasonable amount of time is spent; have been aimed at both theft detection (i.e., Digimarc's MarcSpider service) and at resolving ownership in a court of law. Fragile watermarks, such as described in..