One of the first posts in this FileOpen blog described an attack on Google and other companies, the 2009 "Aurora" hack, which highlighted risks inherent in the centralization of user credentials and data. Since that time it has emerged that this attack was probably a Chinese counterespionage operation designed to identify the targets of US wiretap orders, apparently to determine which agents had been compromised, and that the attackers gained entry to Google's systems by exploiting the Gmail backdoor that had been built in order to comply with US wiretap orders.