Workshop on deployment perspectives of Physical Layer Security into wireless public RATs at the IEEE PIMRC’16

The invited paper titled RECiP: Wireless Channel Reciprocity Restoration Method for Varying Transmission Power“ by G. Wunder, R. Fritschek, and R. Khan will be presented at the
27th Annual IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) on Sunday, September 4th, 2016 Valencia Congress Centre, Valencia, SPAIN


ETSI Workshop on Future Network Technologies, Jan. 27-28 2016, Sophia Antipolis at ETSI Premises/France

PROPHYLAXE contributed JOINTLY with the European project PHYLAWS this paper to the WS:

Perspectives of Physical Layer Security (Physec) for the improvement of the subscriber privacy and communication confidentiality at the Air Interface
Results for WLANs, IoT and radiocells. Download PDF

François Delaveau, (Thales), Andreas Mueller (Bosch), Christiane Kameni Ngassa (Thales),
René Guillaume (Bosch), Renaud Molière (Thales), Gerhard Wunder (Fraunhofer Heinrich Hertz Institut)

Abstract: Physical layer security (PHYSEC) is a promising new security approach in the context of the IoT and ubiquitously connected systems. PHYSEC exploits the intrinsic randomness of the radio channel between several nodes to establish cryptographic keys in a plug-and-play manner, to achieve information-theoretic security without complex ciphers, and to securely pair devices. Each of these opportunities has been successfully demonstrated by the German research project Prophylaxe for application to the Internet of Things (Wi-Fi and IEEE 802.15.4) and by the European project Phylaws for application to Wi-Fi and to Radio-cells (LTE).


First Joint PHYLAWS — PROPHYLAXE Workshop hosted by BOSCH/Stuttgart

BOSCH hosted the FIRST joint physical layer security workshop in Stuttgart/Renningen
with participation from the European PHYLAWS project (http://www.phylaws-ict.org/)as well as
the German PROPHYLAXE project (http://www.ict-prophylaxe.de/) and it became a very interesting
and fruitful event! Follow-up activities are planned.


June 20-21th PROPHYLAXE Meeting in Berlin!

The latest PROPHYLAXE meeting took place at the Heinrich Hertz Institute in Berlin on June 20-21th. All partners provided their latest demos for physical layer key generation and also authentication using Wifi 802.11 or 6LowPan networks or SDR boards. The developed concepts provide a promising path to establish scalable, manageable, and user friendly security in the context of the Internet of Things.

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**NEW ARTICLE: 6doku: Towards Secure Over-the-Air Preloading of 6LoWPAN Nodes using PHY Key Generation

K. Krentz and G. Wunder, 6doku: Towards Secure Over-the-Air Preloading of 6LoWPAN Nodes using PHY Key Generation, Smart SysTech 2015 ( June 16 to June 17 ), Aachen Germany, accepted.

Abstract: Currently, adding a new node to an existing 6LoWPAN network is tedious. The user has to plug a cableinto each new node so as to preload it with cryptographic material, as well as other configuration settings. This approach not only lacks usability and scalability, but also incurs higher per unit costs due to USB ports. To facilitate preloading, Wilhelm et al. proposed “SUDOKU” – a scheme for preloading nodes wirelessly. SUDOKU incorporates PHY key generation and Diffie-Hellman key exchange. In this paper, we propose a streamlined and more practical version of SUDOKU entitled “6DOKU”. 6DOKU dispenses with Diffie-Hellman key exchange, which saves resources. Furthermore, 6DOKU provides the user with a mobile preloading tool, whereas SUDOKU requires the user to preload nodes in an isolated area before installation. 6DOKU not only improves on SUDOKU, but is competitive among other wireless preloading schemes, too. We prototyped 6DOKU’s preloading tool as an Android app and give first experimental results.


**NEW ARTICLE:6LoWPAN Security: Avoiding Hidden Wormholes using Channel Reciprocity

Fig.Hidden Wormhole detection

6LoWPAN Security: Avoiding Hidden Wormholes using Channel Reciprocity, Konrad-Felix Krentz, Gerhard Wunder, Proceedings of the 4th International Workshop on Trustworthy Embedded Devices, ACM
Download PDF

Abstract: Wireless multi-hop networks of IoT devices, are vulnerable to so-called hidden wormholes. Jain et al. proposed a channel reciprocity-based wormhole detection scheme, which is advanced in this paper. The underlying idea is that channel reciprocity breaks ii and only if the Ping-Pongs were relayed by a wormhole. We introduce improved security protocols, metrics and channel frequency selectivity.


1st IEEE GLOBECOM 2014 International Workshop on the Internet of Things (IoTS) featured GLOBECOM FIRST DEMO NIGHT with PROPHYLAXE demos

1st IEEE GLOBECOM 2014 International Workshop on the Internet of Things in Austin (Texas) which was organized by Dr. Andreas Müller, BOSCH and Priv.-Doz. Dr. habil. Gerhard Wunder (HHI) featured HIGH-LEVEL PROGRAM (Qualcomm, GE, Samsung, Siemens, Cisco etc) and FIRST EVER GLOBECOM DEMO NIGHT with initial PROPHYLAXE results & demonstrators! For details, visit http://iots-workshop.com/


New paper for SIoT 2014 accepted (Preprint available upon request)

PROPHYLAXE will present a new IoT security architecture concept using physical layer security at the ‚International Workshop on Secure Internet of Things‘, SIoT 2014 (http://siot-workshop.org/)

Christian T. Zenger, Markus-Julian Chur (Horst Görtz Institute for IT-Security, Ruhr-University Bochum) Gerhard Wunder (Heinrich Hertz Institute Berlin) Christof Paar Horst (Horst Görtz Institute for IT-Security, Ruhr-University Bochum)

Abstract: In this work, we present a new system architecture which is suitable also for resource-constrained platforms. Our design strongly focuses on security, rather than a robust key generation rate, as well as on low complexity and efficiency. Our approach has the potential to dramatically reduce the cost of securing small embedded devices for the Internet of Things, and hence make mass production and deployment viable.


New paper available: 18th International OFDM Workshop 2014

Rene Guillaume, Andreas Mueller (Robert Bosch GmbH), Christian T. Zenger, Christof Paar (RUB EMSEC), and Andreas Czylwik (University of Duisburg-Essen)

Abstract: The generation of symmetric cryptographic keys out of wireless channel properties represents a promising approach for the establishment of secured communication links. Despite the tremendous number of different channel-based key generation protocols, there is little research on security evaluation and fair comparison of those systems. We present suitable metrics and a source model for a security evaluation of quantisation schemes for physical layer security systems. By analysing recent key generation techniques, we evaluate performances and security tradeoffs. See also http://ofdm.nts.uni-due.de/


Paper & Prototype for TrustED 2014

Konrad-Felix Krentz and Gerhard Wunder: “6LoWPAN Security: Avoiding Hidden Wormholes using Channel Reciprocity”

:6LoWPAN networks are 802.15.4-based wireless sensor Networks that seamlessly integrate with IPv6 networks using specially designed protocols. Unfortunately, 6LoWPAN networks are vulnerable to hidden wormholes. To detect and subsequently avoid hidden wormholes, Jain et al. recently proposed two schemes, which exploit the reciprocity of received signal strength indicators (RSSIs). However, threats and attacks can mislead Jain et al.’s schemes into reaching false positives or false negatives. Moreover, their schemes take calibrated RSSIs for granted, which is impractical. In this paper, we propose „Secure Channel REciprocity-based WormholE Detection (SCREWED)“, which avoids both false positives and false negatives to a great extend. For this, SCREWED uses channel hopping, randomized transmission powers, message integrity codes, as well as a special replay protection mechanism. Furthermore, SCREWED obviates the need for calibrating RSSIs by using a different channel reciprocity metric. We integrated SCREWED into the link layer of Contiki’s 6LoWPAN stack and demonstrate SCREWED’s efficacy using TelosB motes.

6LoWPAN Security: Avoiding Hidden Wormholes using Channel Reciprocity

ACM Digital Library



1st International Workshop on the Internet of Things and Services

PROPHYLAXE partners BOSCH and HHI are organizing the ‚1st International Workshop on the Internet of Things and Services – Visions, Technologies & Research Challenges – within the IEEE Global Communication Conference (Globecom) 2014 in Austin, Texas (USA) on Monday, December 8th, full day.

The registration is here: LINK Looking forward to seeing you in Austin!

ABSTRACT: The Internet of Things and Services (IoTS) will be one of the next big things. By enabling all kinds of smart objects, such as intelligent sensors and actuators, to communicate and interact with each other across different networks and domains, a plethora of new services & applications may be created, thus bearing the potential to create substantial new markets and to revolutionize existing ones. Future Smart Factories, for example, will exhibit an unprecedented degree of flexibility and versatility, Smart Homes will improve the comfort, convenience and energy-efficiency at your home and Intelligent Transportation Systems will increase traffic safety and eventually enable autonomous driving. Current forecasts predict that there will be more than 50 billion devices connected to the Internet by 2020 and this is just the beginning. However, it is also quite clear that on the way to a fully connected cyber-physical world numerous research challenges have to be addressed. This includes aspects like the development of new energy- and resource-efficient connectivity solutions, comprehensive support of self-management and plug-and-play mechanisms, novel (usable) security approaches, seamless interoperability across heterogeneous networks and different domains, novel semantic technologies and middlewares, and many more. Also, in order to exploit the full potential of the IoTS, a close collaboration is required between academia, the traditional telecom industry, but also industries representing the different application domains, which probably will be among the main beneficiaries of the IoTS in future. The goal of this workshop is to bring all these players together and to foster a better common understanding, to exchange visions and latest research results, to discuss promising new technologies and to highlight open research challenges. To this end, several renowned experts from industry have been invited, who will cover the topic in keynote speeches and invited talks from different perspectives in order to provide a rather comprehensive overview of all issues that have to be considered in this respect. Besides, the workshop will include a panel discussion on open research challenges and the way forward to finally make the IoTS become reality. Furthermore, it will feature a demo session, during which latest (practical) research results will be showcased and demonstrated.

You should not miss this exciting event if you want to:

  • Learn more about the unprecedented opportunities and applications enabled by the IoTS
  • Get in touch with leading experts and industry representatives and expand your professional network
  • Understand the major research challenges and ongoing developments in this quickly growing area
  • Get a better overview of relevant standardization activities and initiatives
  • See how your own research activities may contribute to the future success of the IoTS

We are already looking forward to meeting you in Austin/Texas in December!


New paper available: IEEE Globecom 2014

Eduard Jorswieck, Anne Wolf and Sabrina Engelmann, (TU Dresden) „Secret Key Generation from Reciprocal Spatially Correlated MIMO Channels“, 
Abstract: Secret key generation from reciprocal multi-antenna channels is an interesting alternative to cryptographic key management in wireless systems without infrastructure access. In this work, we study the secret key rate for the basic source model with a MIMO channel. First, we derive an expression for the secret key rate under spatial correlation modelled by the Kronecker model and with spatial precoding at both communication nodes. Next, we analyse the result for uncorrelated antennas to understand the optimal precoding for this special case: it is equal power allocation. Then, the impact of correlation is characterised using Majorization theory. Surprisingly for small SNR, spatial correlation increases the secret key rate. For high SNR, the maximum secret key rate is achieved for uncorrelated antennas. The results indicate that a solid system design for reciprocal MIMO key generation is required to establish the secret key rate gains.


Upcoming Workshop on Wireless Physical Layer Security at ICC 2014 in 2014

PROPHYLAXE partner are organizing a workshop wireless physical layer security at ICC 2014 in Sydney. Deadline for submissions is 15. Dec. 2013.


New publication available: ISWCS 2013 Ilmenau

In this paper, we analyse the four-node relay wiretap channel, where the relay performs amplify-and-forward. There is no direct link between transmitter and receiver available. The transmitter has multiple antennas, which assist in securing the transmission over both phases. In case of full channel state information (CSI), the transmitter can apply information leakage neutralisation in order to prevent the eavesdropper from obtaining any information about the signal sent. This gets more challenging, if the transmitter has only an outdated estimate of the channel from the relay to the eavesdropper. For this case, we optimise the worst case secrecy rate by choosing intelligently the beam forming vectors and the power allocation at the transmitter and the relay. Paper: Interference Leakage Neutralization in Two-Hop Wiretap Channels with Partial CSI


PROPHYLAXE invited to give a talk

Fraunhofer “Netzwert” Symposium is the biggest networking event within the Fraunhofer consortium with about 350 participants reflecting the global Fraunhofer portfolio! PROPHYLAXE „Providing Physical Layer Security for the Internet of Things“ will be presented in the Security Session, 4 Dezember, 2013 (upcoming event), in Munich (Program tba). See also: Fraunhofer Symposium “Netzwerk” 2012