Wireless Security and Wireless Attacks

📘 Wireless Security and Wireless Attacks — Exam Notes (Network Security)

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📡 1. Introduction to Wireless Security

Wireless Security refers to the techniques and mechanisms used to protect wireless networks (Wi-Fi, Bluetooth, etc.) from unauthorized access, attacks, and data theft.

👉 Simple idea: It ensures that data sent over air (radio waves) is secure, encrypted, and protected from hackers.

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🎯 2. Objectives of Wireless Security

• Protect wireless data from interception
• Prevent unauthorized access to Wi-Fi networks
• Ensure data confidentiality and integrity
• Provide secure authentication for users
• Maintain network availability

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⚠️ 3. Why Wireless Networks Are Vulnerable?

• Data is transmitted through air (broadcast medium)
• Easy for attackers to intercept signals
• Weak passwords or poor encryption
• Misconfigured routers and access points

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🧱 4. Wireless Security Protocols

🔹 1. WEP (Wired Equivalent Privacy)

• Old security standard
• Weak encryption (easily broken) ❌ Not secure today

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🔹 2. WPA (Wi-Fi Protected Access)

• Improved over WEP
• Still has vulnerabilities

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🔹 3. WPA2

• Strong encryption (AES)
• Widely used ✔ Secure for most networks

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🔹 4. WPA3

• Latest and most secure
• Stronger encryption and protection against brute-force attacks

✔ Recommended standard

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🔐 5. Wireless Security Mechanisms

🔸 1. Encryption

• Protects data using algorithms (AES, TKIP)

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🔸 2. Authentication

• Verifies user identity
• Example: Wi-Fi password

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🔸 3. MAC Filtering

• Allows only specific devices

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🔸 4. SSID Hiding

• Hides network name from public view

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🔸 5. Firewalls & IDS

• Monitor wireless traffic

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⚠️ 6. Wireless Attacks

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🔸 1. Eavesdropping

• Attacker listens to wireless communication
• Used to steal sensitive data

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🔸 2. Man-in-the-Middle (MITM)

• Attacker intercepts communication between two users

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🔸 3. Evil Twin Attack

• Fake Wi-Fi access point created
• Users connect unknowingly

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🔸 4. Packet Sniffing

• Capturing wireless packets using tools like Wireshark

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🔸 5. Deauthentication Attack

• Disconnects users from Wi-Fi network

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🔸 6. Rogue Access Point

• Unauthorized access point inside a network

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🔸 7. Brute Force Attack

• Repeatedly guessing Wi-Fi passwords

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🔸 8. Replay Attack

• Capturing and reusing authentication data

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🛡️ 7. Wireless Attack Prevention

🔹 Use WPA3 encryption

🔹 Strong passwords (complex Wi-Fi keys)

🔹 Disable WPS (Wi-Fi Protected Setup)

🔹 Use VPN on public Wi-Fi

🔹 Enable MAC filtering

🔹 Regular firmware updates

🔹 Use IDS/IPS for monitoring

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🔑 8. Important Concept

🔸 Wireless Security Rule

Stronger Encryption + Strong Password + Authentication = Secure Wi-Fi

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🧠 9. Wireless Security Best Practices

• Avoid public Wi-Fi for sensitive data
• Change default router passwords
• Use encrypted protocols (HTTPS, VPN)
• Monitor connected devices
• Disable unused wireless features

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📊 10. Comparison: WPA2 vs WPA3

Feature	WPA2	WPA3
Encryption	AES	Stronger AES + improved security
Brute-force protection	Weak	Strong
Security level	High	Very High

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🖼️ 11. Diagram Descriptions

📌 Wireless Network Setup

• Router → Devices → Wireless communication

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📌 Evil Twin Attack

• Fake Wi-Fi → User connects → Data stolen

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📌 MITM Attack

• User ↔ Attacker ↔ Router

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🧾 12. Real-Life Examples

• ☕ Fake Wi-Fi in coffee shops stealing passwords
• 🏢 Corporate Wi-Fi secured using WPA3
• 📱 Mobile users attacked on public hotspots
• 🌐 Hackers sniffing unsecured networks

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📝 Likely Exam Questions

1. Define wireless security.
2. What are common wireless network threats?
3. Explain WEP, WPA, WPA2, and WPA3.
4. What is an evil twin attack?
5. Explain man-in-the-middle attack in Wi-Fi.
6. How can wireless networks be secured?
7. What is packet sniffing in wireless networks?
8. Explain deauthentication attack.
9. Why are wireless networks vulnerable?
10. Write short notes on:

• WPA3
• Rogue access point
• Eavesdropping

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📌 Quick Summary / Conclusion

• Wireless security protects Wi-Fi and other wireless networks from attacks.
• Main protocols include WEP (weak), WPA, WPA2, and WPA3 (strongest).
• Wireless networks are vulnerable due to open air transmission.
• Attacks include MITM, evil twin, sniffing, and brute force.
• Strong encryption and secure configuration are essential.

👉 In short: Wireless security ensures safe communication over Wi-Fi by using encryption, authentication, and strong protection mechanisms.

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