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Lightweight Cryptography for the Connected Car/ITS Security

ITU Workshop on “ ICT Security Standardization for Developing Countries ” (Geneva, Switzerland, 15-16 September 2014). Lightweight Cryptography for the Connected Car/ITS Security. Shiho Moriai Director, Security Fundamentals Laboratory, Network Security Research Institute NICT.

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Lightweight Cryptography for the Connected Car/ITS Security

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  1. ITU Workshop on “ICT Security Standardizationfor Developing Countries” (Geneva, Switzerland, 15-16 September 2014) Lightweight Cryptography for the Connected Car/ITS Security Shiho Moriai Director, Security Fundamentals Laboratory, Network Security Research Institute NICT

  2. The Connected Car http://johndayautomotivelectronics.com/top-five-technologies-enabling-the-connected-car/

  3. More Attack Surfaces! http://gigaom.com/2013/08/06/ciscos-remedy-for-connected-car-security-treat-the-car-like-an-enterprise/

  4. Much data to be protected Controller Area Network (CAN) Data http://www.aa1car.com/library/can_systems.htm

  5. Much data to be protected V2X Communication Data http://telematicswire.net/connected-cars-and-smart-homes-coherence-of-a-convergence-platform/

  6. Lightweight Cryptography • “Cryptography tailored for implementation in constrained environments” [ISO/IEC 29192-1] • Constraints: chip area, energy consumption, power, memory, communication bandwidth, execution time, etc. • Applications: RFID tags, sensors, health-care/medical devices, low-energy applications, low-latency applications, … • Suitable for Internet of Things!

  7. Lightweight Cryptography • R&D • EU ECRYPT-I (2004-2007), ECRYPT-II (2008-2013) • European Network of Excellence for Cryptology funded within ICT Programme of the European Commission's FP6, FP7 • Japan CRYPTREC (2013-) • Standardization • ISO/IEC 29192 • Lightweight Cryptography, in ISO/IEC JTC SC27 WG2 since 2009

  8. Why Lightweight Cryptography for Vehicles? • A modern vehicle contains 50 to 100 or more electronic control units (ECUs). • collection of embedded constrained devices • CAN bus data field is (only) 32 bits. http://www.digikey.jp/ja/articles/techzone/2014/jul/what-engineers-need-to-know-when-selecting-an-automotive-qualified-mcu-for-vehicle-applications

  9. Why Lightweight Cryptography for Vehicles?

  10. Why Lightweight Cryptography for Vehicles? Chip Area(Gate Size) [Kgate] Lightweight block ciphers Small (=low power) Suzuki, Sugawara, Saeki, “On Hardware Implementation of Lightweight /Low-Latency Cryptography”, SCIS2014

  11. Low Latency • Real-time response is crucial in Advanced Driver Assistance Systems (ADAS). • AES can’t achieve encryption in dozens of nano-seconds within dozens of kgates. Latency [ns] Chip Area [Kgate] Small Fast

  12. Conclusions and Recommendations • Introduced lightweight cryptography • Suitable for constrained devices, the connected cars and ITS security. • Some lightweight algorithms are mature and standardized in ISO/IEC. • It’s time to standardize practical standards for connected cars and ITS security in ITU-T. • Collaboration with automotive industry is necessary.

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