802.11a/b/g Security

• WEP: Wire Equivalent Privacy
  • Shared Secret
  • Does not scale

• Proprietary Solutions
  • ...won't work in a multi-vendor environment

• WPA: Wi-Fi Protected Access
  • Stop-gap measure (802.11i snapshot)
  • Dynamic Key Encryption (via TKIP)
  • Authentication

• 802.11i
  • Adds AES encryption
  • Requires replacement of older or cheaper APs