Wireless Network Security IT Security Ido Rosen - - PowerPoint PPT Presentation

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Introduction Wireless Network Security IT Security Ido Rosen ido@cs.uchicago.edu University of Chicago 5 March 2007 Ido Rosen Wireless Network Security Introduction Introduction 1 Overview Wireless LANs Ido Rosen Wireless Network

SLIDE 1

Introduction

Wireless Network Security

IT Security Ido Rosen ido@cs.uchicago.edu

University of Chicago

5 March 2007

Ido Rosen Wireless Network Security

SLIDE 2

Introduction

1

Introduction Overview Wireless LANs

Ido Rosen Wireless Network Security

SLIDE 3

Introduction Overview

OSI Model

Wireless changes the physical medium. What consequences does this have? Consider:

Much higher latency More dropped packets Easier to sniff (like using a hub). And more...

Physical Link Network Transport Session Presentation Application

Ido Rosen Wireless Network Security

SLIDE 4

Introduction Overview

Networks, Devices, & Standards

Network Types:

Wireless LANs (Managed) Ad Hoc Networks (including WPANs)

Devices:

PDAs, smart phones Laptops Access points / bridges Other devices...

Standards:

WLAN: 802.11a/b/g/n Secure: 802.1X, 802.11i/WPA2(-PSK), WPA(-PSK)∗, WEP† WPAN: Bluetooth Phone: GSM/GPRS/EDGE/UMTS

∗Problem if key is short †Broken/weak. Ido Rosen Wireless Network Security

SLIDE 5

Introduction Overview

Networks, Devices, & Standards

Network Types:

Wireless LANs (Managed) Ad Hoc Networks (including WPANs)

Devices:

PDAs, smart phones Laptops Access points / bridges Other devices...

Standards:

WLAN: 802.11a/b/g/n Secure: 802.1X, 802.11i/WPA2(-PSK), WPA(-PSK)∗, WEP† WPAN: Bluetooth Phone: GSM/GPRS/EDGE/UMTS

∗Problem if key is short †Broken/weak. Ido Rosen Wireless Network Security

SLIDE 6

Introduction Overview

Networks, Devices, & Standards

Network Types:

Wireless LANs (Managed) Ad Hoc Networks (including WPANs)

Devices:

PDAs, smart phones Laptops Access points / bridges Other devices...

Standards:

WLAN: 802.11a/b/g/n Secure: 802.1X, 802.11i/WPA2(-PSK), WPA(-PSK)∗, WEP† WPAN: Bluetooth Phone: GSM/GPRS/EDGE/UMTS

∗Problem if key is short †Broken/weak. Ido Rosen Wireless Network Security

SLIDE 7

Introduction Overview

Networks, Devices, & Standards

Network Types:

Wireless LANs (Managed) Ad Hoc Networks (including WPANs)

Devices:

PDAs, smart phones Laptops Access points / bridges Other devices...

Standards:

WLAN: 802.11a/b/g/n Secure: 802.1X, 802.11i/WPA2(-PSK), WPA(-PSK)∗, WEP† WPAN: Bluetooth Phone: GSM/GPRS/EDGE/UMTS

∗Problem if key is short †Broken/weak. Ido Rosen Wireless Network Security

SLIDE 8

Introduction Wireless LANs

IEEE 802.11

Ido Rosen Wireless Network Security