Cybersecurity startup NewCore emerged from stealth with $66 million in funding on Monday, aiming to solve a challenge it believes many companies will soon face as they deploy AI agents: how to authenticate, govern, and control them at scale. The seed round was led by cybersecurity-focused venture firm Cyberstarts, with participation from Index Ventures and Evolution Equity Partners, valuing NewCore at $300 million after investment. Companies are increasingly treating AI agents as workplace parti...