FILE PHOTO: A man holds a laptop computer as cyber code is projected on him in this illustration picture taken on May 13, 2017. REUTERS/Kacper Pempel/Illustration/ Reuters By Christopher Bing (Reuters) – Security researchers with U.S. cybersecurity firm Symantec said they have discovered a “highly sophisticated” Chinese hacking tool that has been able to escape public attention for more than a decade. The discovery was shared with the U.S. government in recent months, who have shared the information with foreign partners, said a U.S. official. Symantec, a division of chipmaker Broadcom, published its research about the tool, which it calls…