Hackers have penetrated the computer networks of the country's top medical device makers, The Chronicle has learned.
The attacks struck Medtronic, the world's largest medical device maker, Boston Scientific and St. Jude Medical sometime during the first half of 2013 and might have lasted as long as several months, according to a source close to the companies.
It's not clear what exactly the hackers were after, but federal laws meant to safeguard medical information require the companies to disclose any breach involving patient information. The companies have made no such disclosures.
All three companies have extensive operations in the Bay Area. Santa Rosa is home to Medtronic's endovascular therapies and coronary businesses. St. Jude Medical operates manufacturing plants in Sunnyvale. Boston Scientific has offices in San Jose, Santa Clara and Fremont.
The attacks were was "very thorough" and showed signs they might have been committed by hackers in China, the source said.