Advice on Embedding Spreadsheet on Page

Help!

I’m trying to embed or display a table of dynamic data on my website.

I have tried Google docs with an Iframe on my page, but the link is visible to users in the code (this page would be on a paid section of my site, so i don’t want the link shared)

The data is stock market data, so google docs is helpful, because i can get quotes using their api functions.

But i need something more secure, so that the whole world can’t view it.

Anyone have any ideas, something where i can display spreadsheet type data, have the ability to get updated stock quotes, and have the spreadsheet or data be private?

Thanks!