Does the security of your company’s WiFi networks keep you awake at night? Would you like to test the strength of the passwords to that network but can’t afford to tie up a computer for days or weeks to do it? Then a new service called WPA Cracker might be for you.

The recently launched pay-as-you-go service is aimed at “penetration testers.” It links some 400 computers in “the cloud” to accomplish in minutes what would take days or weeks for a single desktop or laptop.

Designed to crack WPA or WPA2 passwords when PSK is used, the service uses massive compilations of words to mount dictionary attacks on a wireless network. It will also crack passwords to zip archives.

The main dictionary used by the service contains 135 million English password possibilities tailored to networks protected by WPA or WPA2. In addition, there’s a 284 million word extended dictionary and 100 million digit dictionary. The extended dictionary is not a superset of the standard dictionary. That is, words in the extended dictionary are not found in the standard one. The digit dictionary contains permutations of passwords composed eight-character-long numbers. Each dictionary can be run against a network separately or in aggregate as a mammoth 520 million password resource. A German dictionary is also offered by the service.

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