Pretty interesting concept you’ve written here. Have you ever heard of GnuPG? There’s a small window that lets you drag and drop files you’d like to encrypt with someone’s public key. I imagine you could combine the two for added security. First encrypt with GnuPG, then zip the encrypted files with SecureZIP. Good luck cracking that!

Just thought I’d also add that I really admire the simplicity of your layout, and the content seems great so far. You got yourself another rss subscriber, so keep up the good work!