Ever since Google started notifying its users when they were targeted by government-sponsored cyber attacks back in 2012, many companies in the technology industry have followed suit, especially after the Snowden leaks popped up the following year. Microsoft has become the latest such company to adopt this practice, possibly in response to the recent revelation that the company discovered a series of cyber attacks back in 2011 that it knew were the work of the Chinese government, but chose not to alert the victims of the attacks. Although the company has been alerting users to potential security breaches for a couple of years, it’s never provided the identity of the attacker, until now.