WiMAX as the broadband last-mile solution

WiMAX Security: Privacy Key Management

‰ WiMAX vitalizes the last mile broadband access. ‰ WiMAX has a range of up to 31 miles.

Nirwan Ansari Advanced Networking Laboratory Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark, NJ 07102-1982, USA Phone: +1-973-596-3670 Email: [email protected] http://web.njit.edu/~ansari @ 2007 Sendai International Workshop on Network Security and Wireless Communications 24 January 2007 4 Advanced Networking Laboratory

New Jersey Institute of Technology

Outline

© 2007 Nirwan Ansari

Advanced Networking Laboratory

New Jersey Institute of Technology

WiMAX as the broadband last-mile solution

‰ What’s WiMAX? ¾ WiMAX applications ¾ WiMAX revolution ¾ Advanced features of WiMAX ¾ PHY Layer ¾ MAC Layer

‰ Security issues in WiMAX

Enterprises (>60 businesses of T1/E1T1/E1-type connectivity)

University Campus/Dorms (T1/E1(T1/E1-type connectivity)

INTERNET BACKBONE

‰ WiMAX standards structure

High High Speed Speed Networking Networking with with data data rates rates up up to to 75 75 Mbps Mbps per per 44sector sector base base station station

WiMAX 802.16 Non-Line-Of-Sight (NLOS) backhaul

Private Network

¾ Threats in WiMAX ¾ Security mechanism in WiMAX

Base Station

‰ Privacy and Key Management (PKM) in WiMAX ¾ PKM v1 ¾ PKM v2

WiMAX 802.16 LOS backhaul

‰ Future research issues

City Hotspots Mobile devices Residential Area (hundreds of homes of DSLDSL-type connectivity) Up to 31 miles (theoretically) Typically 2-10kms(urban areas) / 50kms(rural areas)

2 Advanced Networking Laboratory

© 2007 Nirwan Ansari

5 New Jersey Institute of Technology

Advanced Networking Laboratory

What’s WiMAX?

© 2007 Nirwan Ansari

New Jersey Institute of Technology

Comparing with other wireless Technologies

‰ WiMAX (Worldwide Interoperability for Microwave Access)

802.11 WiFi

802.16 WiMAX

802.20 Mobile-Fi

UMTS 3G

Bandwidth

11-54 Mbps shared

Share up to 70 Mbps

Up to 1.5 Mbps each

384 Kbps – 2 Mbps

Range (LOS) Range (NLOS)

100 meters 30 meters

30 – 50 km 2 - 5 km

3 – 8 km

Coverage is overlaid on wireless infrastructure

2-11 GHz for 802.16a 11-60 GHz for 802.16