Last week we announced a new feature called Personal Vault that will be available soon for OneDrive consumer accounts. See this blog post for more details.
We have no plans to bring Personal Vault to our Commercial customers at this time, but continue to make investments in advanced security features that are unique to the Commercial service.Erik Olson commented
I'm curious as to why it takes so long to get "standard" features into OneDrive & OneDrive for Business? A single syncing client that supports both OneDrive & Sharepoint took a year+. Password protecting a single file? File access expiration dates? Ability to utilize OneDrive as a "fileshare" similar on on premise servers? All of these are standard, required functionality that all the other guys seem to already have. What good is having 1TB of OneDrive storage if we have to go out and buy another solution just to have functional file sharing?