A Practical Set-Membership Proof for Privacy-Preserving NFC Mobile Ticketing

To ensure the privacy of users in transport systems, researchers are working on new protocols providing the best security guarantees while respecting functional requirements of transport operators. In this paper, we design a secure NFC m-ticketing protocol for public transport that preserves users' anonymity and prevents transport operators from tracing their customers' trips. To this end, we introduce a new practical set-membership proof that does not require provers nor verifiers (but in a specific scenario for verifiers) to perform pairing computations. It is therefore particularly suitable for our (ticketing) setting where provers hold SIM/UICC cards that do not support such costly computations. We also propose several optimizations of Boneh-Boyen type signature schemes, which are of independent interest, increasing their performance and efficiency during NFC transactions. Our m-ticketing protocol offers greater flexibility compared to previous solutions as it enables the post-payment and the off-line validation of m-tickets. By implementing a prototype using a standard NFC SIM card, we show that it fulfils the stringent functional requirement imposed by transport operators whilst using strong security parameters. In particular, a validation can be completed in 184.25 ms when the mobile is switched on, and in 266.52 ms when the mobile is switched off or its battery is flat

State College Times, November 15, 1932

Volume 21, Issue 30https://scholarworks.sjsu.edu/spartan_daily_1932/1094/thumbnail.jp

Justice (Vol. 3, Iss. 5)

Justice was the official publication of the International Ladies’ Garment Workers’ Union ILGWU from 1919 to 1995. Editions of Justice were published in English, Italian, Spanish, and Yiddish. When compared side by side, the content of some of these different editions of Justice shows significant differences. This is the English-language edition of Justice.Justice_5_42.pdf: 26 downloads, before Oct. 1, 2020

Approaches to Using e- and m-Business Components in Business

This paper discusses using e- and m-business components in supporting and enhancing existing businesses and in creating new business innovations. A framework illustrating two different approaches companies have to adoption of e- and m-business components is proposed. Three cases of how Finnish companies have, in an innovative way, used e- and m-business components to support, to enhance, and to launch businesses are presented. Based on the illustrative framework and the cases, some rules of thumb for using e- and m-business components in business are proposed. The aim of this paper is to offer managers helpful insights for planning e- and m-business component investments.e-Business; m-Business; Business Models; Case Studies

Privacy-Preserving Electronic Ticket Scheme with Attribute-based Credentials

Electronic tickets (e-tickets) are electronic versions of paper tickets, which enable users to access intended services and improve services' efficiency. However, privacy may be a concern of e-ticket users. In this paper, a privacy-preserving electronic ticket scheme with attribute-based credentials is proposed to protect users' privacy and facilitate ticketing based on a user's attributes. Our proposed scheme makes the following contributions: (1) users can buy different tickets from ticket sellers without releasing their exact attributes; (2) two tickets of the same user cannot be linked; (3) a ticket cannot be transferred to another user; (4) a ticket cannot be double spent; (5) the security of the proposed scheme is formally proven and reduced to well known (q-strong Diffie-Hellman) complexity assumption; (6) the scheme has been implemented and its performance empirically evaluated. To the best of our knowledge, our privacy-preserving attribute-based e-ticket scheme is the first one providing these five features. Application areas of our scheme include event or transport tickets where users must convince ticket sellers that their attributes (e.g. age, profession, location) satisfy the ticket price policies to buy discounted tickets. More generally, our scheme can be used in any system where access to services is only dependent on a user's attributes (or entitlements) but not their identities.Comment: 18pages, 6 figures, 2 table

Electronic Ticketing in Public Transport

http://dx.doi.org/10.1080/15472450701293866 http://hdl.handle.net/1871/2368

The Cowl - v.26- n.16 - Oct 10, 1973

The Cowl - student newspaper of Providence College. Volume 26, Number 16 - October 10, 1973. 12 pages. Note: The volume number printed on the banner page of this issue (XXVI) duplicates the volume number for 1963-64 academic year