Truecrypt Portable gives you secure enough encryption (in other words, if the NSA is after you, encryption is futile without much more thorough preparations; for most uses, this is quite enough).<p>Notepad.exe gives you text editing. (Or anything else that could edit text, really - notepad is Everywhere and is so stupid simple that it has no obvious flaws; its 54 kB character limit is essentialy a non-issue in hand-typed journals)<p>So, what I do with sensitive data: (create a Truecrypt encrypted container file the first time) - when unlocked, that container will appear as a new disk when unlocked - create a file in that disk - work on that file - lock the container again, done. This has the added bonus that the container is a file you can take with you (sync to Dropbox, put on a USB disk, whatever) and the content is secure.<p>Usual caveats apply: choose a LONG passphrase and don&#x27;t forget it (there&#x27;s <i>no</i> &quot;password recovery&quot;!!!), don&#x27;t unlock the container on untrusted computers (malware snooping in is the biggest worry here), don&#x27;t copy the sensitive file(s) outside the container.<p>(A single program that does both of these things is unlikely to do both of them <i>well</i> - and encryption is really easy to botch in many non-obvious ways. Therefore, I use one program for encryption, another for text editing. It&#x27;s slightly less convenient, but much more flexible: e.g. if I decide that I want to use DarkRoom for text editing, I don&#x27;t need to make changes to the encryption part. I could even store non-text data: images, GPS traces, sound clips, mindmaps; all that without worrying how it would fit with a text editor)