BRUSSELS - A top Google scientist sent a warning to EU antitrust regulators on Tuesday that its proposal ​requiring the company to share search engine data with rivals such as OpenAI ‌risked exposing ‌users' private information, the sternest rebuke yet in a tussle over ​Google's lucrative business model.The European Commission, which acts as the EU competition enforcer, has in recent years cracked down on Big Tech via a slew of legislation to ensure that ⁠users have more choices and that smaller rivals have room to compete. However, that has triggered the ire of ⁠the U.S. government.Sergei Vassilvitskii, with the title of distinguished scientist at Google since 2012 and regarded a leader in his field, will meet EU antitrust ​officials on Wednesday to voice his concerns ⁠and propose a broader approach with better guardrails.