A participant at the Seccon 2016 hackers competition uses a laptop computer in Tokyo, on Jan. 28, 2017. Tomohiro Ohsumi/Getty ImagesArtificial intelligence (AI) security startup Cyera on June 10 announced it had raised $600 million in Series G funding for a post-money valuation of $12 billion.The latest fundraising, led by Evolution Equity Partners, quadruples the company’s valuation in 18 months. In January, Cyera raised $400 million in Series F financing led by alternative asset manager Blackstone, valuing the company at $12 billion.