German security researcher Thomas Roth has created a program that runs on Amazon’s Elastic Cloud Computing (EC2) system. It uses the massive computing power of EC2 to run through 400,000 possible passwords per second. Roth’s software generates millions of passphrases, encrypts them, and sees if they allow access to the network. He claims that a typical wireless password can be guessed by EC2 and his software in about six minutes. It’s claimed that up to 20 characters are enough to create an uncrackable passphrase.”]
Source: https://www.csoonline.com/article/2126555/cloud-used-to-hack-wireless-passwords.html