1,721,137 research outputs found
Security of Blind Digital Signatures (Extended Abstract)
No full text) Ari Juels 1? Michael Luby 2 Rafail Ostrovsky 3 1 RSA Laboratories. Email: [email protected]. 2 Digital Equipment Corporation, 130 Lytton Avenue, Palo Alto, CA 94301-1044. Email: [email protected]. 3 Bell Communications Research, 445 South St., MCC 1C-365B, Morristown, NJ 07960-6438, USA. Email: [email protected]. Abstract. Blind digital signatures were introduced by Chaum. In this paper, we show how security and blindness properties for blind digital signatures, can be simultaneously defined and satisfied, assuming an arbitrary one-way trapdoor permutation family. Thus, this paper presents the first complexity-based proof of security for blind signatures. 1 Introduction A digital signature scheme allows one to "sign" documents in such a way that everyone can verify the validity of authentic signatures, but no one can forge signatures of new documents. The strongest definition of security for a digital signature scheme was put forth by Goldwasser, Micali, and Rivest [15]. Several..
Oktalan okosszerződés – avagy mindig az ember győz?
No full textRecenzió. Ari Juels: The Oracle. Talos Press, 2024, p. 288. ISBN: 978-1-945863-86-
Outsmarting Smart Contracts – or Does Man Always Win?
No full textReview. Ari Juels: The Oracle. Talos Press, 2024, p. 288. ISBN: 978-1-945863-86-
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Strengthening EPC Tags Against Cloning
No full textAbstract. The EPC (Electronic Product Code) tag is a form of RFID (Radio-Frequency IDentification) device that is emerging as a successor to the printed barcode. Like barcodes, EPC tags emit static codes that serve to identify and track shipping containers and individual objects. EPC tags, though, have a powerful benefit: they communicate in an automated, wireless manner. Some commercial segments, like the pharmaceutical industry, are coming to view EPC tags as an anti-counterfeiting tool. EPC tags are a potent mechanism for object identification, and can facilitate the compilation of detailed object histories and pedigrees. They are poor authenticators, though. EPC tags are vulnerable to elementary cloning and counterfeiting attacks. In this paper, we present techniques that strengthen the resistance of EPC tags to elementary cloning attacks. Our proposals are compliant with EPCglobal Class-1 Generation-2 UHF tags, which are likely to predominate in supply chains. We show how to leverage PIN-based accesscontrol and privacy enhancement mechanisms in EPC tags to achieve what may be viewed as crude challenge-response authentication. Our techniques can even strengthen EPC tags against cloning in environments with untrusted reading devices
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