Papers and Presentations

Download (some of) my public paper and presentations

 

 

2014  
Klaus Finkenzeller, Giesecke & Devrient Gmbh Munich, Dirac-Measurement-Technology: An innovative approach for fast measuring f and Q.  Presented at icma 2014, Munich [to be provided later]
   
2013  

A Review and Comparative Study of On- and Off-Body Performance of Platform-Tolerant UHF RFID Tag Antennas
Markus Gardill (1), Klaus Finkenzeller (2), Walter Hinz (2), Georg Fischer (1), Robert Weigel (1), and Alexander Koelpin (1).

This paper addresses the remote identifying of human subjects by means of UHF RFID tags. In particular, we provide a comprehensive review of recent approaches in the design of compact, platform-tolerant UHF RFID antennas for on- as well as off-body applications, suitable for the integration in credit-card sized devices with dimensions of about 82 mm x 52 mm and few millimeters thickness. We first categorize previously published antenna designs and interrelate the various approaches. We then provide detailed simulation results for several selected design approaches, and compare the performance of the proposed antenna structures when used in free-space, placed in proximity to a homogenous phantom half-space model, and when used on or in proximity to a layered elliptical body model. We provide a comparative study by evaluating all approaches using the same figure of merits, which are the power transfer and the estimated read range, evaluated in exactly the same simulation environment for all approaches.

This paper was commonly published from Fridrich Alexander University Erlangen-Nürnberg (1) and Giesecke & Devrient GmbH Munich (2).

Presentation

   

Extending ISO/IEC 14443 Type A Eavesdropping Range using Higher Harmonics
Maximilian Engelhardt (1), Florian Pfeiffer (3), Klaus Finkenzeller (2), Erwin Biebl (1), Vorgetragen auf der Smart-Systech, Erlangen 2013

Best Paper Award: Wie schon vor zwei Jahren in Dresden, dürfen wir uns auch dieses Jahr über die Auszeichnung zum besten Konferenzbeitrag der Smart SysTech 2013 in Nürnberg-Erlangen freuen. Der diesjährige Beitrag befasst sich mit einem neuartigen Ansatz, die ISO/IEC 14443-Mithörreichweite eines potentiellen Angreifers zu erhöhen. Dieser Standard für Kontaktloskarten wird u.a. in Anwendungen eingesetzt bei denen die geringe Reichweite (< 10 cm) ein wichtiges Sicherheitsmerkmal ist. In unseren Messungen konnten wir unter bestimmten Voraussetzungen die bisher publizierten Abhörreichweiten (von 1 bis 3 Meter) um ein Vielfaches steigern (was wiederum die Wichtigkeit kryptographischer Verfahren für kontaktlose Datenübertragung bestätigt). Auf der RFID-SysTech 2011 in Dresden wurde unser Beitrag zur Reichweitenerhöhung eines ISO/IEC 14443 Transponders mit aktiver Lastmodulation als bestes Paper ausgezeichnet.

Beide Beiträge sind eine Gemeinschaftsveröffentlichung von Giesecke & Devrient GmbH (1), perisens GmbH (2) und der TU München (3).

Presentation
Paper

   

Kryptografie in UHF Tags - Aktueller DIN-Vorschlag zur Standardisierung einer Crypto Suite (German language)
Klaus Finkenzeller, Walter Hinz, Katharina Schulz (alle: Giesecke & Devrient GmbH München)

Der vorliegende Beitrag beschreibt einen von uns eingereichten Normungsvorschlag für ISO/IEC 29167 [2], der eine Crypto Suite basierend auf dem Rabin-Montgomery Verfahren für UHF Tags definiert.

This paper was presented by my collegue Katharina Schulz at the BSI Congress on Security 2013: BSI IT-Sicherheitskongress 2013
Presentation
Paper
   

Secure UHF Tags with Strong Cryptography, Development of ISO/IEC 18000-63 Compatible Secure RFID Tags and Presentation of First Results.
Walter Hinz, Klaus Finkenzeller and Martin Seysen (all: Giesecke & Devrient GmbH München)
This paper presents a concept for an UHF tag supporting cryptographically strong authentication which is based on the Rabin-Montgomery public key cryptosystem in accordance with the framework of ISO/IEC 29167-1. It uses an easily computable long integer square operation for the public key encryption of a tag ID record. Only a legitimate interrogator who is in possession of the private key can decrypt this message and retrieve the authentic tag ID. A working prototype based on a standard FPGA is shown which demonstrates the feasibility of the proposed cryptographic function

This paper was presented by my collegue Dr. Walter Hinz at the Sensornets 2013 conference

Presentation
Paper
   
2012  
Pfeiffer, F. (1), Finkenzeller, K. (2), Biebl, E. (1): Theoretical Limits of ISO/IEC 14443 type A RFID Eavesdropping Attacks, Smart-Systech, Munich 2012

This paper was commonly published from the Technical University Munich (1) and Giesecke & Devrient GmbH Munich (2).

Presentation
Paper

   
2011  
Finkenzeller, K. (2), Pfeiffer, F. (1), Biebl, E. (1): Range Extension of an ISO/IEC 14443 type A RFID System with Actively Emulating Load Modulation. Presented at RFID-Systech, Dresden, May 2011, Best Paper Certificate
Originally designed for contactless smart cards in the form factor ID1, today ISO/IEC 14443 finds new applications in an increasing number of different form factors. Most famous among the new form factors are applications such as the electronic passport (e-passport) or contactless credit cards in a form factor that is only half or one third as large ("key fob") as ID1. The need of increasingly smaller form factors, however, more often leads to problems in the field, because the small transponder cannot always be read out reliably.
This has led to a new type of a battery powered transponder, actively emulating load modulation, to enhance the operating distance. Whereas ISO/IEC 14443 focuses on very small antennas and small transmission power to allow reliable communication distances of a few centimetres, we were looking in the opposite direction. Using quite large antennas and huge transmission power we achieved communication distances in the range of a few meters. We also learned, however, that the effort spent to enhance the reading range
increases drastically with each additional meter, quickly ending up with equipment like a "broadcast radio station".
The issue presented in this paper is not linked to a future application, but describes the practical limits of a potential attack scenario.


This paper was commonly published from the Technical University Munich (1) and Giesecke & Devrient GmbH Munich (2).
Presentation
Paper
   
Finkenzeller, K. (Giesecke & Devrient GmbH Munich): Battery powered tags for ISO/IEC 14443, actively emulating load modulation. Presented at RFID-Systech, Dresden, May 2011

Originally designed for contactless smart cards in the form factor ID1, today ISO/IEC 14443 finds new applications in an increasing number of different form factors. Most famous among the new form factors are applications such as the electronic passport (e-passport) or contactle ss credit cards in a form factor that is only half or one third as large (“key fob”) as ID1. The need of increasingly smaller form factors however, more often leads to problems in the field, becausethe small transponder cannot always be read out reliably. It
becomes a real problem, whenthe contactless data carriersare miniaturized even further, to be operated inside a mobile phone as a micro-SD or SIM card. With a passive transponder, a reliable communication with the reader can not beguaranteed any more. A proposal for a new work item in the standardization of contactless smartcards (ISO/IEC 14443), which describes the use of battery-assisted transponders,will be a helpful new approach to overcome such limitations. The following article describes the basic principle behind
this new type of transponder.
Presentation
Paper
   
Finkenzeller, K. (Giesecke & Devrient Gmbh): Batteriegestützte Transponder in ISO/IEC 14443. Eine neue Transponder Klasse. Darmstadt, Feb. 2011, Vortrag auf dem Smartcard Workshop 2011
Ursprünglich für kontaktlose Chipkarten im Formfaktor ID1 entwickelt, findet die ISO/IEC 14443 in immer unterschiedlicheren Formfaktoren neue Anwendungen. Am bekanntesten unter den neuen „Bauformen“ sind dabei Anwendungen wie der elektronische Reisepass ePass, oder kontaktlose Kreditkarten in einem Format, das nur mehr halb oder ein drittel so groß wie ID1ist. Gerade der Drang zu immer kleineren Formfaktoren führt jedoch immer häufiger zu Problemen im Feld, da die kleinen Transponder nicht immer sicher ausgelesen werden können. Problematisch wird es, wenn die kontaktlosen Datenträger noch weiter miniaturisiert werden und zum Beispiel als micro-SD oder SIM-Karte in einem Mobiltelefon eingebaut betrieben werden, da hier eine zuverlässige Kommunikation mit dem Lesegerät nicht mehr gewährleistet werden kann. Abhilfe schafft nun ein neuer Vorschlag in der Stan-
dardisierung, welcher den Einsatz batteriegestützter Transponder beschreibt. Der folgende Artikel beschreibt die physikalischen Grundlagen dieser Transponder, sowie das weitere Vorgehen in der Standardisierung.

Presentation
Paper

   
2009  
Finkenzeller, K. (Giesecke & Devrient GmbH): Known attacks on RFID-systems, possible countermeasures and upcomming standardisation activities, invited key note speach. Bremen, Juni 2009, RFID-Systech Presentation
   
2008  
Effing, W., Finkenzeller, K., Rankl, W.: Der Schlüssel zum Erfolg - was wir aus der Vergangenheit für die Zukunft der Kartentechnologie lernen können. Darmstadt, Feb. 2008, Smartcard Workshop

Presentation
Paper