Chinese hackers accessed over 400 computers and over 3,000 unclassified files when they infiltrated the U.S. Treasury.

The US Treasury Department announced in a letter back in December that it had been the victim of a security breach, attributing it to a “China state-sponsored Advanced Persistent Threat actor.” Now we know more about the extent of the hack,

A recent breach of the US Treasury yielded access to Secretary Janet Yellen's computer along with those of two of her lieutenants, according to inside sources speaking to Bloomberg News reporters.