Albert Gonzalez is an American computer hacker and computer criminal who is accused of masterminding the combined credit card theft and subsequent reselling of more than 170 million card and ATM numbers from 2005 to 2007: the biggest such fraud in history. Gonzalez and his accomplices used SQL injection to deploy backdoors on several corporate systems in order to launch packet sniffing attacks which allowed him to steal computer data from internal corporate networks.