NSA cybersecurity chief: Revelations from Chinese hacking leak are ‘eye-opening’

The revelations of a Chinese contractor’s hacking tools have astonished the world’s top cybersecurity experts, including the U.S. government’s most senior analysts at the National Security Agency.

A trove of documents, images and messages from the Chinese government-affiliated security contractor I-Soon suddenly appeared on the GitHub software development platform this month, offering what experts say is an unprecedented peek into the world of China’s hackers for hire.

NSA Cybersecurity Director Rob Joyce said the I-Soon disclosures have provided a new window into how China hacks. Security professionals continue combing the...