Mobile Security Fall 2011

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1 Mobile Security Fall 2011 Patrick Tague Class #9 Smartphones, PANs, and the IoT

2 Announcements HW #2 will be posted this week Project group meetings: I'd like to schedule a meeting with each group before the 10/26 progress report

3 Personal area networks Agenda The Internet of Things A few security / privacy concerns

4 Personal Area Networks Personal area networks enable device-to-device communication, i.e. no Internet Based on the IEEE family : Bluetooth : coexistence with other wireless systems : High-rate WPAN, including UWB : Low-rate WPAN, including ZigBee : mesh networking : body area networks (BAN) : visible light communication (VLC)

5 Bluetooth provides Bluetooth PHY Short range, few devices, low power, cheap Commonly used for home, personal, office networks Bluetooth piconet is similar to WLAN (1 server, n clients) (1 master, n slaves), only no back-end

6 Ultra-Wideband Based on standard Very high data rate (~Gbps), very low power, very short distances (10-100cm) High-rate file transfer, streaming audio/video, wireless display, wireless printing, Coexists with other wireless protocols

7 ZigBee Based on (and building on) Designed for home automation, low-rate control systems, sensor networks, etc. ZigBee builds a full network stack on top of the PHY/MAC

8 Body Area Networks working group, standardization in prog. Data collection from and control of medical sensors and implanted medical devices Incredibly low power, esp. implanted devices

9 Visible Light Communication Based on WG7 Device-to-device and device-to-infrastructure communication using visible LEDs / sensors THz, unregulated, potential for high-rate and lowrate communication

10 PAN Challenges Most PAN standards specify lower layer (PHY/MAC) functionality for device-to-device communication Higher layer services are not included or needed Security in device-to-device (ad hoc) communications is notoriously difficult Bluetooth security has been a constant struggle How to improve security in ad hoc scenarios?

11 PAN + Internet =? One approach to address some of the PAN challenges is to tether to the Internet Ad hoc agreement can include a trusted 3 rd party web server, cloud service, broker, etc. Ex: Bluetooth exchanges using cloud-based key management, ID verification, etc. Hybridization of devices + Internet connectivity allows for a wider variety of services

12 Internet of Things What is the Internet of Things (IoT)? Originally: IoT = Internet-wide identification of objects using RFID tags, allowing all things to be indexed via the Internet More recently: IoT = Global interconnection of physical and virtual things IoT = Internet-enabled smart control systems IoT = Network of identifiable things with virtual personalities, allowing for smart spaces IoT = Internet-wide connection of objects to the internet using unique IPv6 addresses, allowing all things to be accessed on the Internet

13 PAN + Internet = IoT?

14 Tethered PANs Tethering PAN devices to the Internet via some sort of gateway device allows a broader scale of device-to-device communications Ex: Sensor gateways Ex: UbiPAN [Albert et al., 2010] Extends Bluetooth networks using IP and SIP services But is this the IoT?

15 PAN + Internet IoT?

16 Gateways / Proxies: IoT Enablers Gateway device provides extended connectivity (similar to 3G/4G core gateway for mobile Internet) Gateway devices serve as translators between PAN devices and Internet ZigBee UWB WiFi / ZigBee / UWB Bluetooth / WiFi Internet RFID / NFC ZigBee

17 IoT Enablers Control point / mediator Alternatively, a control point can act simultaneously as a gateway, a switch, and an interaction device Internet

18 IoT Enablers 4G (not 4G ) networking Ubiquitous IP-based access using 4G allows arbitrary (permitted) devices to access Internet using numerous access media Internet

19 So, what else is the IoT? PAN and IP provide the basic network building blocks; true IoT requires services

20 IoT Security & Privacy In addition to standard IP / web security issues: Device-to-device communication security Secure neighbor discovery, device addition/removal Usable key management (think WiFi only more) Control signal verification / integrity Privacy of user information in context-aware services and applications...

21 What's Next? 10/5: SURVEY on PAN and IoT security issues 10/10-24: Mobile OS and app security

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