“The Keychain can also store secure notes. These are just snippets of text, but because they’re part of your Keychain, they’re safe from prying eyes. To create a secure note, click on the Note icon in the toolbar. Give the note a name; then type your note text or paste it in from another application, such as TextEdit, Microsoft Word, or your e-mail client (see “Don’t Pass This Note”).
A secure-note item works much like a password item: you can see information about the note in the Attributes panel at the bottom of the Keychain Access window. By selecting the Show Note option and providing your account password, you can view the note itself.”
The Keychain’s Hidden Powers | Macworld
Was considering to write a simple tutorial for the use of the Keychain, as many don’t even realize it exists but of course the Macworld has already done such a job.
I love the possibility of writing small notes/pieces of text and keeping it secure and encrypted. I use it many times for storing personal data other than passwords and many times for keeping a “handwritten” backup of the passwords itself.
So, do yourself a favor and go read the quoted article about the keychain. You’ll be surprised with what the keychain can do and what time&life saving features it has.