This is certainly doable, if I understand what you are trying to accomplish. However, before you expend any more effort on this, perhaps a step back to rethink this is in order.
Your skin should really be called the "Most Totally Non-Secret Digital Diary Ever". Rainmeter can't encrypt or decrypt anything directly, so if you really want a "secret diary", you need to find another tool. MS OneNote can keep things encrypted if needed, for example. Burying a "secret file" somewhere in the mass of stuff on your hard drive isn't really "security" either, it would take a fraction of a second for a tool like Agent Ransack or Everything to find that file.
Your skin should really be called the "Most Totally Non-Secret Digital Diary Ever". Rainmeter can't encrypt or decrypt anything directly, so if you really want a "secret diary", you need to find another tool. MS OneNote can keep things encrypted if needed, for example. Burying a "secret file" somewhere in the mass of stuff on your hard drive isn't really "security" either, it would take a fraction of a second for a tool like Agent Ransack or Everything to find that file.
Statistics: Posted by SilverAzide — 14 minutes ago