privacy in wireless networks

Privacy in Wireless Networks Keeping your private data private

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Privacy in Wireless

Networks

Keeping your private data private

(CC) 2007 Michael Boman (BY-SA 3.0)

About Me

• 7 years in IT Security• Principal Investigator for SIG2

SoHo Honeypot project• Working on innovative ideas at the

Standard Chartered Innovation Labat Singapore Management University

• Maintaining several personal websites– http://proxy.11a.nu– http://www.securitytinker.com

http://proxy.11a.nu/

http://www.securitytinker.com/

(CC) 2007 Michael Boman (BY-SA 3.0)

Agenda

• Threats to your privacy• Technical solutions how to keep your data

private

(CC) 2007 Michael Boman (BY-SA 3.0)

Who are we protecting our privacyfrom?

• Individuals• Corporations• Governments

(CC) 2007 Michael Boman (BY-SA 3.0)

Attacks against wireless networks

• Data interception• Man-in-the-middle attacks• Fake access points

(CC) 2007 Michael Boman (BY-SA 3.0)

Sniffing the air

• Interception of– Email– Instant Messaging– Web Surfing

Anonymous Internet

Access

The How-To Guide

(CC) 2007 Michael Boman (BY-SA 3.0)

Surfing with SSL

• Any website using SSL is safe from prying eyes– Make sure that SSL certificate validates– Be aware of mixed-content sites

(CC) 2007 Michael Boman (BY-SA 3.0)

Verify SSL usage in the browser

(CC) 2007 Michael Boman (BY-SA 3.0)

Using VPN

• Running your own VPN at home-office• Commercial VPN providers

(CC) 2007 Michael Boman (BY-SA 3.0)

VPN Packet RoutingUnencrypted Link

Encrypted Link

VPN Server

Site

(CC) 2007 Michael Boman (BY-SA 3.0)

TOR - The Onion Router

• History• How It works• Pitfalls

(CC) 2007 Michael Boman (BY-SA 3.0)

TOR Packet Routing

TOR Directory Server

Site 1

Site 2

TOR Node

Unencrypted Link

Encrypted Link

(CC) 2007 Michael Boman (BY-SA 3.0)

TOR Packet Routing

TOR Directory Server

Site 1

Site 2

TOR Node

Unencrypted Link

Encrypted Link

(CC) 2007 Michael Boman (BY-SA 3.0)

TOR Packet Routing

TOR Directory Server

Site 1

Site 2

TOR Node

Unencrypted Link

Encrypted Link

(CC) 2007 Michael Boman (BY-SA 3.0)

Summary

• Your data can easily be intercepted• Protect yourself using

– SSL enabled websites– VPN tunnels– TOR Networks– Don’t forget Personal Firewalls, Anti-Virus and Anti-

Spyware

(CC) 2007 Michael Boman (BY-SA 3.0)

Questions & Answers

• Slides @ www.securitytinker.com• Mail @ [email protected]

• These slides are licensed underCreative Commons Attribution-ShareAlike 3.0http://creativecommons.org/licenses/by-sa/3.0/

http://www.securitytinker.com/

mailto:[email protected]

(CC) 2007 Michael Boman (BY-SA 3.0)

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Technology

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privacy technical solutions

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questions answers slides