Business cloud software giant Workday has acquired Seattle-based Trusted Key in a deal that shows how the startup studio model is gaining traction. Founded in 2016 by former executives at Microsoft and Oracle, Trusted Key developed a digital identity platform based on blockchain technology. The company spun out of Kernel Labs, a Seattle startup studio that creates new companies from scratch with a support system of financial, technical and administrative expertise. Kernel has quietly launched seven companies in the fields of machine learning, cybersecurity and virtual reality.