Author, as appears in the article.: Domingo-Ferrer, Josep; Blanco-Justicia, Alberto; Rafols, Carla

Department: Enginyeria Informàtica i Matemàtiques

URV's Author/s: Blanco Justicia, Alberto / Domingo Ferrer, Josep

Keywords: Smartphones Short-range communications Identity-based encryption Group size accreditation Group discounts Digital signatures Buyer privacy Broadcast encryption

Abstract: Group discounts are used by vendors and authorities to encourage certain behaviors. For example, group discounts can be applied to highway tolls to encourage ride sharing, or by museum managers to ensure a minimum number of visitors and plan guided tours more efficiently. We show how group discounts can be offered without forcing customers to surrender their anonymity, as long as customers are equipped with some form of autonomous computing device (e.g. smartphone, tablet or computer). Specifically, we present a protocol suite for privacy-aware group discounts that allows a group of customers to prove how many they are without disclosing their identities. The group does not need to be a stable one, but can have been formed on the fly. Coupled with an anonymous payment system, this makes group discounts compatible with buyer privacy (in this case, buyer anonymity). We present a detailed complexity analysis, we give simulation results, and we report on a pilot implementation.

Thematic Areas: Software Safety, risk, reliability and quality Matemática / probabilidade e estatística Information systems Engenharias iv Computer science, theory & methods Computer science, software engineering Computer science, information systems Computer networks and communications Ciência da computação

ISSN: 16155262

Author's mail: alberto.blanco@urv.cat josep.domingo@urv.cat

Author identifier: 0000-0002-1108-8082 0000-0001-7213-4962

Last page: 260

Record's date: 2023-02-22

Journal volume: 17

Papper version: info:eu-repo/semantics/submittedVersion

Link to the original source: https://link.springer.com/article/10.1007/s10207-017-0368-y

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: International Journal Of Information Security. 17 (3): 243-260

APA: Domingo-Ferrer, Josep; Blanco-Justicia, Alberto; Rafols, Carla (2018). Dynamic group size accreditation and group discounts preserving anonymity. International Journal Of Information Security, 17(3), 243-260. DOI: 10.1007/s10207-017-0368-y

Article's DOI: 10.1007/s10207-017-0368-y

Entity: Universitat Rovira i Virgili

Journal publication year: 2018

First page: 243

Publication Type: Journal Publications