Computer Networking › Section H · Security in computer networks › Topic H.8
Securing wireless LANs and cellular networks
A radio signal reaches everyone in range, so the first hop of a wireless connection is the easiest place for Trudy to listen or pretend to be the network. Wi-Fi and cellular systems answer with mutual authentication and fresh keys for every connection.
In this topic
- Why the wireless hop needs its own protection
- A short history of Wi-Fi security
- Four phases of 802.11i
- Personal and enterprise modes
- The four-way handshake
- Worked example: following the handshake
- Management frames and open networks
- Authentication in 4G
- Worked example: 4G AKA step by step
- What 5G changed
- Common mistakes to avoid
- Key takeaways
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