Wireless network security

1. Wireless NetWork security
Presenter: Mohammad Rostami
Supervisor: Dr Maghsoud Abbaspour
Shahid Beheshti University
Summer 2020

2. Introduction
Wireless Security
Wireless Network Threats
Wireless Security Measures
Mobile Device Security
Security Threats
Mobile Device Security Strategy
IEEE 802.11 Wireless LAN Overview
IEEE 802 Protocol Architecture
IEEE 802.11 Network Components and Architectural Model
IEEE 802.11 Services
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3. Introduction
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IEEE 802.11i Wireless LAN Security
IEEE 802.11i Services
IEEE 802.11i Phases of Operation
Discovery Phase
Authentication Phase
Key Management Phase
Protected Data Transfer Phase

4. Wireless Security
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Channel
 Mobility
Resources
Accessibility

5. Wireless Network Threats
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Accidental association
Malicious association
Ad hoc networks
Nontraditional networks

6. Wireless Network Threats
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Identity theft (MAC spoofing)
Man-in-the middle attacks
Denial of service (DoS)
Network injection

7. Wireless Security Measures
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 Securing Wireless Transmissions
 Signal-hiding techniques
 Encryption
 Securing Wireless Access Point

8. Wireless Security Measures
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 Securing Wireless Networks
 Use encryption
 Use antivirus and antispyware software, and a firewall
 Turn off identifier broadcasting
 Change the identifier on your router from the default
 Change your router’s pre-set password for administration
 Allow only specific computers to access your wireless network

9. Mobile Device security
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 Growing use of new devices
 Cloud-based applications
 De-perimeterization
 External business requirements

10. Mobile Device security
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 Security Threats
 lack of PhySical Security Controls
 Use of Untrusted Mobile Devices
 Use of Untrusted Networks
 Use of Applications Created by Unknown Parties

11. Mobile Device security
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 Security Threats
 Interaction with Other Systems
 Use of Untrusted Content
 Use of Location Services

12. Mobile Device security
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 Mobile Device Security Strategy

13. IEEE 802.11 WireLess Lan Overview
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14. IEEE 802 Protocol Architecture
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15. IEEE 802 Protocol Architecture
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 General IEEE 802 MPDU Format

16. IEEE 802.11 Network Components and
Architectural Model
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17. IEEE 802.11 Services
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 Distribution of Messages Within a DS
 Distribution
 Integration

18. IEEE 802.11i Wireless lan security
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 Wired Equivalent Privacy (WEP)
 Wi-Fi Protected Access (WPA)
 Robust Security Network (RSN)

19. IEEE 802.11i Services
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 Authentication
 Access control
 Privacy with message integrity

20. IEEE 802.11i Services
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21. IEEE 802.11i Phases of Operation
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22. Discovery Phase
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23. Authentication Phase
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 MPDU Exchange
 Connect to AS
 EAP exchange
 Secure key delivery

24. Key Management Phase
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 pre-shared key (PSK)
 master session key (MSK)
 pairwise master key (PMK)
 pairwise transient key (PTK)

25. Key Management Phase
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26. Protected Data Transfer Phase
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 Temporal Key Integrity Protocol
 Message integrity
 Data confidentiality
 Counter Mode-CBC MAC Protocol
 Message integrity
 Data confidentiality