I don't know what's happening with this now, but I remember the Pond ( https://www.imperialviolet.org/2013/11/10/pond.html https://www.imperialviolet.org/2013/1

I don't know what's happening with this now, but I remember the Pond ( https://www.imperialviolet.org/2013/11/10/pond.html https://www.imperialviolet.org/2013/11/10/pond.html ) project working on something like this. I believe they were trying to do this with encrypted data as opposed to plaintext, but their work might still be interesting. IIRC a big part of it was batching transmissions and introducing a delay, sending 'dummy' data when there was no 'real' data, at regular intervals (to prevent timing/traffic correlation attacks). It kind of reminded me of the old Asynchronous Transfer Mode protocol, with its cells.