This document discusses offline brute force attacks on WiFi Protected Setup (WPS). It describes how WPS uses an 8-digit PIN code that can be cracked through brute force attacks. It also details the "Pixie Dust" attack method, which recovers the pseudorandom number generator state used by WPS to determine the encryption keys, allowing offline cracking of the PIN and recovery of the WiFi passphrase.
26.12.2011 Version 3 Stefan Viehböck https://twitter.com/sviehb http://sviehb.wordpress.com/ Brute forcing Wi-Fi Protected Setup When poor design meets poor implementation. Page 2 of 9 Introduction “Wi-Fi Protected Setup™ is an optional certification program from the Wi-Fi Alliance that is designed to ease the task of setting up and configuring security on wireless local area networks. Introduced
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