25. Wireless Security
Chala mitrano, aaj Wi-Fi cha vishay. Wi-Fi cha signal bhinti palikade, road paryant jato – mhanje tumcha data hawet aahe. Mhanunach Wi-Fi chi suraksha itki mahatvachi. Aaj aapan shiku Wi-Fi kase surakshit hote (WEP, WPA, WPA2, WPA3), attacker kay karto, ani – sarvat mahatvacha – tumcha swatahcha Wi-Fi kasa surakshit thevaycha. Ek goshta ekdum pakki: he sagle fakt tumchya swatahchya Wi-Fi var. Dusryachya Wi-Fi var he karne gunha aahe, thet turungat javnara. Samjla ka? Chala!
What you will learn in this chapter
- How Wi-Fi security evolved: WEP, WPA, WPA2, WPA3
- Monitor mode and the Aircrack-ng suite (concept and commands)
- How a WPA2 handshake capture and offline crack works, and why a strong passphrase stops it
- Evil twin and deauth attacks, in concept
- Securing your own Wi-Fi: WPA3/WPA2, strong passphrase, WPS off, guest network, router hardening
Lab scope for this whole chapter
Test only your own Wi-Fi router, one you fully control. Capturing handshakes, deauthenticating clients, or cracking any other network is a crime under the IT Act (sections 43 and 66). Even "just checking" a neighbour's Wi-Fi is illegal.
Concepts in this chapter
- 25.1Wi-Fi Security Standards
- 25.2Monitor Mode and the Aircrack-ng Suite
- 25.3WPA2 Handshake Capture and Offline Cracking
- 25.4Evil Twin and Deauth Attacks (Concept)
- 25.5Securing Your Own Wi-Fi
- 25.6Red vs Blue, Project and Real Incidents
The chapter recap is at the end of the last concept page.