Awesome

reaver-webui

Simple WebUI to crack wireless networks using reaver

Why

• Plug 2 wireless USB cards in an RPi
• Setup hostapd (for one of the cards)
• Setup reaver-webui to run on boot
• Connect to that self-hosted network and reaver-webui URL from a phone and crack networks on-the-go

Links

reaver - reaver implements a brute force attack against Wifi Protected Setup (WPS) registrar PINs in order to recover WPA/WPA2 passphrases
Raspberry Pi - low cost, credit-card sized computer
hostapd - user space daemon for access point and authentication servers