I am excited about this really cool idea. I read the update, but does it mean there are two approaches: one where you pack all the content into fragments, and another where you encrypt it on the client side, save it to the server, and reduce the content to data containing only the key?
Also, wouldn't it be better if the encryption and fragmented compression could also be handled on the web client side?
That’s exactly what happens. We encrypt client side. The sever only gets encrypted data. You can inspect the network request to see what the sever receives. Your decryption key always stays client side (in the url fragment).
Also, the short URL (which saves the content in cypher format on the server) is optional. It only triggers if you specifically trigger it (by clicking “Generate” at the top of the rendered document). If you don’t click that everything stays client side in the fragment.