[CSSer]

I built this for my company. It’s create-react-app with Redis. Redis works great in this instance because it has built-in functionality for timed expiration (no cron needed). I use Node’s crypto to cipher it in the browser with a randomly generated short passphrase, generate a random ID, insert the ciphered message into the DB with the aforementioned ID, and then use the ID and passphrase to build a URL (passphrase as fragment) that is given to the user to share.