I use Evernote's select-text-to-encrypt and local notebooks. If Evernote offered the ability to just as easily, and securely, encrypt notes and notebooks (allowing you to attach PDFs, which currently you can't do with select-text-to-encdrypt), I'd put things like my tax records and scans of IDs in Evernote. I'd also be willing to pay a bit more for the functionality. That's just me though; I do pay separately for a ID theft monitoring service.