Earlier quoted context omitted.
I'm thinking of building a WebRTC-based service to do just that, can you point me to an existing service that does similar things, so I don't waste my time? Thanks!
Everything? Sharepoint, DropBox, Owncloud, LogMeIn, Flickr, Google Docs, et al. Private/one-time-use URLs have been a "thing" since practically forever and they're all over the place.
Would anyone here use a WebRTC-based service that also encrypted the file in transit, thus making it pretty hard for anyone other than the recipients to see it?