There's a pretty good idea, and we've built a browser version to implement it. Using steganography technology, you can directly hide any file inside a PNG image within the browser—completely processed locally on the client side without a server. In the demo, we tested it with the Bitcoin white paper. The beauty of this technology is that the hidden files are completely invisible to outsiders, and the entire process happens in your browser, ensuring maximum privacy. Want to give it a try? Play around with the tool called "Just Hide It."