Add a suitable browser extension, enter the shared secret and "read between the lines".
“Twitter Steganography using manual annotation and codebooks (2014)”
(https://github.com/shadowrun96/pteroglosia)
Sure it’s an academic proof of concept, but pretty cool nonetheless, and a good combination of widely accessible technologies.
But I feel that the answer to the privacy question will lean more on low tech cunning and decentralization/reduced mediation, rather than hi tech or state-backed solutions.
Like, how do you get the NSA to not snoop on your itinerary? Buy a physical agenda/day planner, think in paper, speak face to face, walk, don’t take the phone. Easy basic stuff, though you may end up speaking in a hushed voice and utter terms like “the people”, “the system”, and “off grid” more often than usual - you know, usual for sheeple. Like a conspiratorial Tourette’s. Am I missing some rabbit ears there?
And of course we will always have rebus and heraldry (allegory and memes)!
Consider this:
“The Pooh duck-stepping a Lemming path towards a cliff.”
No tech necessary (other than the Internet, a mind blowing basic amenity), but every Chinese person can get a political message, where an algorithm would get a syntactically incorrect sentence.
“Go water bags!” is what I’m saying, I guess, though I think I lost my drift a while back :)
I used the go code to develop an iOS app that, while I and my friends thought was very cool, Apple didn't think had enough features to publish :(
Edit: Obviously this isn't going to fly under the radar when a state actor is concerned.
We've actually tried implementing a browser extension before. The problem is ordinary people just don't use browser extensions..