Chinese authorities have told domestic companies to stop using cybersecurity software made by more than a dozen firms from the U.S. and Israel due to national security concerns, three people briefed on the matter said. As trade and diplomatic tensions flare between China and the U.S. and both sides vie ​for tech supremacy, Beijing has been keen to replace Western-made technology with domestic alternatives. The U.S. companies whose cybersecurity software has been banned include Broadcom-owned VMware, Palo Alto ‌Networks and Fortinet, while the Israeli companies include Check Point Software Technologies, two of the sources said.