Material Security has closed a $100 million funding round on a $1.1 billion valuation. The Redwood City, California-based email security startup plans to take its patents for safeguarding sensitive content found in old emails and apply them to content stores for other SaaS applications such as Dropbox, Google Drive and Slack. The Series C round was led by Founders Fund and brings Material up to $162 million of outside funding. Material is looking to expand its sales, marketing and support teams to engage in more traditional demand-generation activities.”]