Arrest of Cybersecurity Researcher Worries Hackers, Firms

The arrest in the U.S. on hacking-related charges of a British computer whiz hailed for slowing a massive global cyberattack in May has stunned and divided the cybersecurity community. It also shines a spotlight on a gray area in cybersecurity, the often hidden forums where experts trying to protect corporate and government interests interact clandestinely with suspected criminals.