National Institute of Standards and Technology における超伝導研究及び生活

The objective of this paper is to give a comprehensive introduction to applied cryptography with an engineer or computer scientist in mind. The emphasis is on the knowledge needed to create practical systems which supports integrity, confidentiality, or authenticity. Topics covered includes an introduction to the concepts in cryptography, attacks against cryptographic systems, key use and handling, random bit generation, encryption modes, and message authentication codes. Recommendations on algorithms and further reading is given in the end of the paper. This paper should make the reader able to build, understand and evaluate system descriptions and designs based on the cryptographic components described in the paper.

[서평]「Applied Cryptography」

Wireless vehicular communication has the potential to enable a host of new applications, the most important of which are a class of safety applications that can prevent collisions and save thousands of lives. The automotive industry is working to develop the dedicated short-range communication (DSRC) technology, for use in vehicle-to-vehicle and vehicle-to-roadside communication. The effectiveness of this technology is highly dependent on cooperative standards for interoperability. This paper explains the content and status of the DSRC standards being developed for deployment in the United States. Included in the discussion are the IEEE 802.11p amendment for wireless access in vehicular environments (WAVE), the IEEE 1609.2, 1609.3, and 1609.4 standards for Security, Network Services and Multi-Channel Operation, the SAE J2735 Message Set Dictionary, and the emerging SAE J2945.1 Communication Minimum Performance Requirements standard. The paper shows how these standards fit together to provide a comprehensive solution for DSRC. Most of the key standards are either recently published or expected to be completed in the coming year. A reader will gain a thorough understanding of DSRC technology for vehicular communication, including insights into why specific technical solutions are being adopted, and key challenges remaining for successful DSRC deployment. The U.S. Department of Transportation is planning to decide in 2013 whether to require DSRC equipment in new vehicles.

Dedicated Short-Range Communications (DSRC) Standards in the United States

There has been significant interest and progress in the field of vehicular ad hoc networks over the last several years. VANETs comprise vehicle-to-vehicle and vehicle-to-infrastructure communications based on wireless local area network technologies. The distinctive set of candidate applications (e.g., collision warning and local traffic information for drivers), resources (licensed spectrum, rechargeable power source), and the environment (e.g., vehicular traffic flow patterns, privacy concerns) make the VANET a unique area of wireless communication. This article gives an overview of the field, providing motivations, challenges, and a snapshot of proposed solutions.

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A tutorial survey on vehicular ad hoc networks

Vehicular networking has significant potential to enable diverse applications associated with traffic safety, traffic efficiency and infotainment. In this survey and tutorial paper we introduce the basic characteristics of vehicular networks, provide an overview of applications and associated requirements, along with challenges and their proposed solutions. In addition, we provide an overview of the current and past major ITS programs and projects in the USA, Japan and Europe. Moreover, vehicular networking architectures and protocol suites employed in such programs and projects in USA, Japan and Europe are discussed.

Vehicular Networking: A Survey and Tutorial on Requirements, Architectures, Challenges, Standards and Solutions

Foreword. About the Editors. Preface. Acknowledgements. List of Contributors. 1 Introduction (Hannes Hartenstein and Kenneth P. Laberteaux). 1.1 Basic Principles and Challenges. 1.2 Past and Ongoing VANET Activities. 1.3 Chapter Outlines. 1.4 References. 2 Cooperative Vehicular Safety Applications (Derek Caveney). 2.1 Introduction. 2.2 Enabling Technologies. 2.3 Cooperative System Architecture. 2.4 Mapping for Safety Applications. 2.5 VANET-enabled Active Safety Applications. 2.6 References. 3 Information Dissemination in VANETs (Christian Lochert, Bjorn Scheuermann and Martin Mauve). 3.1 Introduction. 3.2 Obtaining Local Measurements. 3.3 Information Transport. 3.4 Summarizing Measurements. 3.5 Geographical Data Aggregation. 3.6 Conclusion. 3.7 References. 4 VANET Convenience and Efficiency Applications (Martin Mauve and Bjorn Scheruermann). 4.1 Introduction. 4.2 Limitations. 4.3 Applications. 4.4 Communication Paradigms. 4.5 Probabilistic, Area-based Aggregation. 4.6 Travel Time Aggregation. 4.7 Conclusion. 4.8 References. 5 Vehicular Mobility Modeling for VANETs (Jerome Harri). 5.1 Introduction. 5.2 Notation Description. 5.3 Random Models. 5.4 Flow Models. 5.5 Traffic Models. 5.6 Behavioral Models. 5.7 Trace or Survey-based Models. 5.8 Integration with Network Simulators. 5.9 A Design Framework for Realistic Vehicular Mobility Models. 5.10 Discussion and Outlook. 5.11 Conclusion. 5.12 References. 6 Physical Layer Considerations for Vehicular Communications (Ian Tan and Ahmad Bahai). 6.1 Standards Overview. 6.2 Previous Work. 6.3 Wireless Propagation Theory. 6.4 Channel Metrics. 6.5 Measurement Theory. 6.6 Emperical Channel Characterization at 5.9 GHz. 6.7 Future Directions. 6.8 Conclusion. 6.9 Appendix: Deterministic Multipath Channel Derivations. 6.10 Appendix: LTV Channel Response. 6.11 Appendix: Measurement Theory Details. 6.12 References. 7 MAC Layer and Scalability Aspects of Vehicular Communication Networks (Jens Mittag, Felix Schmidt-Eisenlohr, Moritz Killat, Marc Torrent-Moreno and Hannes Hartenstein). 7.1 Introduction: Challenges and Requirements. 7.2 A Survey on Proposed MAC Approaches for VANETs. 7.3 Communication Based on IEEE 802.11p. 7.4 Performance Evaluation and Modeling. 7.5 Aspects of Congestion Control. 7.6 Open Issues and Outlook. 7.7 References. 8 Efficient Application Level Message Coding and Composition (Craig L Robinson). 8.1 Introduction to the Application Environment. 8.2 Message Dispatcher. 8.3 Example Applications. 8.4 Data Sets. 8.5 Predictive Coding. 8.6 Architecture Analysis. 8.7 Conclusion. 8.8 References. 9 Data Security in Vehicular Communication Networks (AndreWeimerskirch, Jason J Haas, Yih-Chun Hu and Kenneth P Laberteaux). 9.1 Introduction. 9.2 Challenges of Data Security in Vehicular Networks. 9.3 Network, Applications, and Adversarial Model. 9.4 Security Infrastructure. 9.5 Cryptographic Protocols. 9.6 Privacy Protection Mechanisms. 9.7 Implementation Aspects. 9.8 Outlook and Conclusions. 9.9 References. 10 Standards and Regulations (John B Kenney). 10.1 Introduction. 10.2 Layered Architecture for VANETs. 10.3 DSRC Regulations. 10.4 DSRC Physical Layer Standard. 10.5 DSRC Data Link Layer Standard (MAC and LLC). 10.6 DSRC Middle Layers. 10.7 DSRC Message Sublayer. 10.8 Summary. 10.9 Abbreviations and Acronyms. 10.10 References. Index.

VANET : vehicular applications and inter-networking technologies

One of the key goals of a vehicular ad-hoc network (VANET) is providing sufficient quality of service (QoS) for real-time safety applications while concurrently supporting commercial services. This paper proposes a multi-channel wireless communication architecture and protocol for the scenario where commercial services are provided by roadside infrastructure. This solution extends the IEEE 802.11 wireless LAN protocol to schedule periodic safety messages in a safety channel . It explicitly supports concurrent non-time-critical communications in separate, non-safety service channels . Further, it is shown that this arrangement maximizes service channel access time while maintaining the requisite QoS for safety applications. This paper concludes with simulations that confirm the attractive properties of this architecture and protocol.

A Multi-channel VANET Providing Concurrent Safety and Commercial Services

In this paper, we propose a medium access control (MAC) protocol to support the multi-channel operation for dedicated short range communication (DSRC). In particular, we focus on the challenge of providing potentially high-bandwidth for non-safety applications provided by roadside infrastructure, without compromising safety communication occurring in a separate channel. In our architecture, when a vehicle approaches a DSRC service hot-spot, it switches from the ad-hoc mode to the coordinated mode (and switches back to ad-hoc as it leaves the hotspot's range). This coordinated mode is a variant of IEEE 802.11 PCF, modified for multi-channel operation. The coordinated mode maximizes utilization of the DSRC "service channels" in the DSRC hot-spots while allowing safety-message broadcasts to be received with high probability in a distinct "safety channel". When a vehicle is not within the range of a DSRC hot-spot, the vehicle can use any of the previously-proposed ad-hoc protocols. Our approach can use any of these ad-hoc protocols for its ad-hoc mode. The MAC protocol is simulated with realistic mobility trace, and verified that it meets our safety and service objectives.

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A multi-channel VANET providing concurrent safety and commercial services

In a VANET, a certificate authority issues keys andcertificates to vehicles. Each vehicle distributes these certificates to other VANET participants and subsequently signs messages against these certificates. If the certificate authority needs to revoke a certificate (e.g. due to a breach of trust), it universally distributes a certificate revocation list. We propose a method for car-to-car epidemic distribution of certificate revocation lists which is quick and efficient. Large-scale simulations based on realistic mobility traces show that this epidemic model significantly outperforms methods that only employ road side unit distribution points.

Kenneth P. Laberteaux

Papers

A tutorial survey on vehicular ad hoc networks

VANET : vehicular applications and inter-networking technologies

A Multi-channel VANET Providing Concurrent Safety and Commercial Services

A multi-channel VANET providing concurrent safety and commercial services

Security certificate revocation list distribution for vanet