How to Demonstrate Our Presence without Disclosing
Identity? Evidence from a Grouping-Proof Protocol
SPEAKER
Mr ZHUANG Yun Hui
PhD Student
Department of Computer Science
City University of Hong Kong
Hong Kong
DATE 24 August 2015 (Monday)
TIME 4:30 pm - 5:00 pm
VENUE CS Seminar Room, Y6405, 6th Floor
Yellow Zone, Academic 1
City University of Hong Kong
83 Tat Chee Avenue
Kowloon Tong
ABSTRACT
The recent hot debate on "mobile sharing economy" has been an emergence in a dynamic
ownership economy, which attracts lots of attentions in the news media. The concept and
practice of resource sharing has been fast becoming a mainstream phenomenon across the
world. People share assets to their friends via Internet or smartphones. Meanwhile, researchers are
now beginning to weigh in with deeper analysis in terms of security and privacy, which turn out to
be one critical area of argument when sharing the items with others. To securely track the location
of the item is of high importance in many mobile applications, which rely heavily on the notion of
device proximity. In addition to securely and precisely determining an item's location, it is also
desirable to preserve the privacy and untraceability of the item. Grouping-proof protocols are
often used to prove the presence of a group of Provers to the Verifier at the same time. In this
paper, we propose a new grouping-proof protocol that is well deployed in proximity identification
systems, where each Prover needs to demonstrate its presence to the Verifier without disclosing its
real identity. Our protocol is mutually authenticated and secure against all known attacks in a
grouping-proof setting. Furthermore, the protocol retains the untraceability of a tag through
forward privacy and prevents de-synchronization attacks.
This paper will be presented at The 16th International Workshop on Information Security
Applications (WISA 2015), Jeju Island, Korea, August 20-22, 2015
Supervisor: Dr Gerhard P Hancke
Research Interests: Information and System Security; RFID, Smart Cards/Tokens and IoT; Sensing
and Control Systems; Embedded Systems
All are welcome!
In case of questions, please contact Dr Gerhard P Hancke at Tel: 3442 9341, E-mail: gp.hancke@cityu.edu.hk, or visit
the CS Departmental Seminar Web at http://www.cs.cityu.edu.hk/.