Evernote provides a cloud-based note taking and clipping service that lets you store information for access from any Web-connected device. Tips for using Evernote are routinely shared on Twitter (just search #evernotetip). Unfortunately, amidst all the clever suggestions for using Evernote are several very risky tips. Here are Seven Deadly Sins: Evernote Tips You Should Avoid.

Security and convenience are always a bit of a trade-off, but you may want to take a look at Evernote’s “encryption” feature for things like passwords and social security numbers. Select some text, right-click, and encrypt it with a secret passphrase to keep it away from prying eyes.
That encryption is merely password-protecting specifically selected text and only in the GUI. Previous tests reveal that in the local database, the selected text still remains searchable in plain text. Further, whole notes, images, Notebooks, etc, cannot be encrypted. You could secure the local database using something like TrueCrypt, but that wouldn’t carryover to other devices. The only “real” encryption provided is SSL, which merely protects the data while in transit. (And even that level of protection is limited in the free version).
Don’t get me wrong – Evernote is great for collecting and organzing many things. But if using it to store sensitive data, you should ensure it’s in a local notebook only (and encrypted with a third party tool) – which kind of defeats the purpose of using Evernote for it.
“Previous tests reveal that in the local database, the selected text still remains [sic] searchable in plain text.”
Technically true, but access to a hex editor is required. You can’t search for and find encrypted text from within Evernote.