Hackers uncovered a flaw in Hotmail’s security in 1999, which allowed access to any Hotmail email account by entering “eh” as the password. This crippling flaw was deemed to be “the most widespread security incident in the history of the web.” The group that took responsibility for the flaw’s exposure, known as Hackers Unite, claimed that they didn’t want to destroy anything by leaking it but rather wanted to draw seemingly much-needed attention to Microsoft’s failing security systems. Experts believe that the ability to access any email account with a simple password was unintentionally left behind as a “backdoor” by Microsoft’s engineers, something Microsoft has never admitted. Instead, they merely palmed it off as an “unknown security issue.”