I ran such an attack on stackoverflow's data dump in 2011 and recovered about 28% of emails, using only a simple laptop CPU. https://meta.stackexchange.com/que

I ran such an attack on stackoverflow's data dump in 2011 and recovered about 28% of emails, using only a simple laptop CPU. https://meta.stackexchange.com/questions/44717/is-gravatar-a-privacy-risk/84734#84734 https://meta.stackexchange.com/questions/44717/is-gravatar-a... Somebody else ran a similar attack on a different dataset using a GPU and recovered around 45%. https://arstechnica.com/information-technology/2013/12/crypto-weakness-in-web-comment-system-exposes-hate-mongering-politicians/ https://arstechnica.com/information-technology/2013/12/crypt...