Authors:
Petr Dzurenda
1
;
Jan Hajny
1
;
Lukas Malina
1
and
Sara Ricci
2
Affiliations:
1
Brno University of Technology, Czech Republic
;
2
Universitat Rovira i Virgili, Spain
Keyword(s):
Attribute-based Credentials, Anonymity, Efficient Revocation, Elliptic Curves, Privacy, Smart Cards.
Related
Ontology
Subjects/Areas/Topics:
Access Control
;
Data and Application Security and Privacy
;
Data Engineering
;
Databases and Data Security
;
Identification, Authentication and Non-Repudiation
;
Information and Systems Security
;
Internet Technology
;
Privacy
;
Privacy Enhancing Technologies
;
Web Information Systems and Technologies
Abstract:
Anonymous Attribute-Based Credential (ABC) schemes allow users to anonymously prove the ownership of their attributes, such as age, citizenship, gender. The ABC schemes are part of a larger group of cryptographic constructions called Privacy Enhancing Technologies (PETs), aiming to increase user's privacy. In the article, we present a new ABC scheme based on elliptic curves and HM12 scheme. The scheme provides anonymity, untraceability, unlinkability, selective disclosure of attributes, non-transferability, revocation and malicious user identification. By involving elliptic curves, we achieved faster verification phase (by 30%) and smaller communication cost between user and verifier (by 85%) compared to the original HM12 scheme, with equivalent or greater security level.