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Chapter 3 PowerPoint Presentation

Chapter 3

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Chapter 3

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  1. Chapter 3 Application Level Security in Wireless Network IWD2243 : Zuraidy Adnan : Sept 2012

  2. Application of WLANs IWD2243 : Zuraidy Adnan : Sept 2012 • Sharing Internet Access • Within small office or home setting • Transmitting Voice over WLANs • Retail stores, Schools, Hotel, etc. • Manufacturing Industry and Inventory Management • Track and update inventory in real time • Raw materials and finished product statistics up-to-date.

  3. Wireless Threats IWD2243 : Zuraidy Adnan : Sept 2012 • Targeted Attackers • Attacking specific valuable assets in organization • Attackers of Opportunity • Random attack, organization not secured enough • Internal Attackers • Maybe accidental, or can be planned to bypass rule that has been set up by IT Dept.

  4. Some Vulnerabilities and Attack Methods over WLANs (1) IWD2243 : Zuraidy Adnan : Sept 2012 • Human Error • Rogue Access Points • Employee Installed Rogue Access Points • Misconfigured Rouge Access Points • Rouge Access Points From Neighbour WLANs • Ad-hoc Devices • Rogue Access Point that do not adhere to Corporate Policies • Rogue Access Point Operated by Attackers

  5. Some Vulnerabilities and Attack Methods over WLANs (2) IWD2243 : Zuraidy Adnan : Sept 2012 • Warchalking • Modern version of ‘Hobo’ sign language. See figure 3.5 page 65. • MAC address Spoofing • Setting on firewall and ISP • Noisy Neighbours • Wireless signal radius exceed • Man-In-The-Middle Attacks • Intercept, altered, and send back fraudulent info • Blocked. See figure 3.6, page 67 • Simply be read and sent back to receipient.

  6. Security for 1G WiFi Applications (1) IWD2243 : Zuraidy Adnan : Sept 2012 • Security issues • Equipment has security settings disabled by default • Minimal security easily broken • Rogue access points are easy to deploy and difficult to detect • Security features • Service Set Identifier (SSID) • Mac Address filter • Wired Equivalent Privacy (WEP) encryption

  7. Security for 1G WiFi Applications (2) IWD2243 : Zuraidy Adnan : Sept 2012 • Security vulnerabilities • SSID broadcasted in clear text • MAC address can be sniff by rogue client • WEP encryption easily cracked • Rogue AP can intercept traffic from other clients • Man-in-the-middle attack can be launch using spoof SSID • DoS attacks using spoof MAC address • Security controls

  8. Security for 1G WiFi Applications (3) IWD2243 : Zuraidy Adnan : Sept 2012 • Security controls • Turning off broadcast SSID • Introducing automated MAC-based access control mechanisms • Enabling WEP encryption • Lowering the power level of access points.

  9. Security for 2G WiFi Applications (1) IWD2243 : Zuraidy Adnan : Sept 2012 • Encryption and Virtual Private Network (VPN) • WEP -WiFi Protected Access (WPA) – Advanced Envryption Standard (AES) • Virtual Private Network (VPN) – Combination of tunneling, encryption, authentication, and access control • Extensible Authentication Protocol (EAP) • EAP-TLS - Microsoft • Lightweight EAP (LEAP) – Cisco • Protected EAP (PEAP) • Tunneled TLS (EAP-TTLS)

  10. Security for 2G WiFi Applications (2) IWD2243 : Zuraidy Adnan : Sept 2012 • Wireless Gateways • AP directly connect to Wireless Gateways • Simplifying roaming between AP • Ablility to implement QoS at a single point. • Policies, training, and awareness • Physical location of AP • Logical location of AP • Rogue AP • Peer-to-peer mode • Configuration

  11. Security for 2G WiFi Applications (2) IWD2243 : Zuraidy Adnan : Sept 2012 • Interoperability • Site Surveys • Monitoring • Updates and patches • Other

  12. Recent Security Schemes for WiFi Applications (1) IWD2243 : Zuraidy Adnan : Sept 2012 • Software based Generic Authentication Schemes for Mobile Communication • Passwords • Table 3.1, page 74, Generic Password Scheme • Image-based Authentication • Table 3.2, page 74, Dejavu Scheme • Table 3.3, page 75, Image Passpoints Algorithm • Token and Keys • Table 3.4, page 76, Hwang-Li’s scheme for smart card authentication. • Biometrics • Mobile Authentication in PKI infrastructures

  13. Recent Security Schemes for WiFi Applications (2) IWD2243 : Zuraidy Adnan : Sept 2012 • Generating Digital Signature on Mobile Devices • Reputation Systems in WiFiNetworks • Table 3.5, page 79, Reputation System Algorithm. • Location Dependent Data Encryption/Decryption • See figure 3.7, page 79, Location dependent security a scenario • Table 3.6 Location dependent Data Encryption • Personalized Firewalls