Well I fear even if the information is encrypted alone once quantum computing breaks modern AES encryption standards that’s going to be a yikes. So I’d be more comfortable with encryption as well as access controls.
w.r.t. quantum computing: it is possible for WebFS to use symmetric cryptography for all remote data. Although, many Cell implementations in the near term will likely use elliptic curves or RSA.
I was addressing jerry292's concern about access to the encrypted data in Stores.