1. One of the underlying cryptographic principles is multi-party / secure-party communication (https://en.wikipedia.org/wiki/Secure_multi-party_computation). e.g., three people want to share their salaries to each other, but don't want the information to be traceable to back to the source.
2. Another is Steganography, hiding text in, say, an image, or audio.
3. You want to prevent the problems with Signal, Tor, Bitcoin, etc. This means, no "50%" problem like Bitcoin, no monitoring of exit nodes like Tor, no centralized distribution issue like Signal.
Imagine:
Alice "sends" a message to Bob by creating an account on Reddit and posts a cat meme which has the hidden text (steganography).
Bob knows how to find the text in that cat meme, and responds by posting something on Twitter, which Alice can read and decrypt.
All this is deniable (I didn't get anything from Alice!), available (e.g., Twitter goes down), and secure.
Indeed. For extra security, post cat pics to three different image boards; only by successfully combining all three can the receiver decode the message. If you are limited by the speed of finding / generating new cat pictures, publish frames from public webcam feeds that show life in a big aquarium, or sunsets, or clouds, or apply artistic filters on hourly charts of stock-trading sessions, etc. Make sure that not every picture contains a part of a message, but that every picture has steganography-like minor alterations, also explainable by applying a sensible but crude filter. In general, you can lace any of the plentiful reasonably stochastic streams with a steganogrphic side-channel.
The approach has limitations: your bandwidth is very low, and your latency is also pretty poor. Worse yet, you have to first establish a complicated protocol between you and your counterparty. In general, I think, it's not cracking your byzantine protocol that would ruin you, but a couple of small opsec mistakes (see Dread Pirate Roberts and the end of Silk Road), and these mistakes may be not even done by you but by your counterparty. Spear-phising, exploiting the local system that runs the communication and has some sensitive material in plain text, game over.
The problem with highly secure and clandestine communication (or any other activity) is that it makes your whole life complicated enough, puts enough extra strain on you, that you become noticeable by that alone. Maybe not immediately, but the probability of a small mistake that could put you on a watch-just-in-case list of a willing state-level actor is always nonzero. This does not mean that the situation is hopeless, but rather means that you have a time limit before your cat-posting scheme, still unbroken, becomes irrelevant, given enough interest from The Man against whom you conspire.
The problem with highly secure and clandestine communication.... it makes your whole life complicated enough, puts enough extra strain on you, that you become noticeable by that alone.... always nonzero.... a time limit before your cat-posting scheme, still unbroken, becomes irrelevant, given enough interest from The Man against whom you conspire.
Hide in the noise, embrace counter-culture, call it while you're up.
Oh, and they have everything forever, so you can't ever make a mistake against future adversaries, within your risk-window.
and if you think the Latina Beaches will serve you as they did those delusional fantasies, they watch those, too.
The beaches, that is.
You can still fantasize about it, though.
If those before you tell you to beware of dragons, do not sneer at their skeletons.
1. One of the underlying cryptographic principles is multi-party / secure-party communication (https://en.wikipedia.org/wiki/Secure_multi-party_computation). e.g., three people want to share their salaries to each other, but don't want the information to be traceable to back to the source.
2. Another is Steganography, hiding text in, say, an image, or audio.
3. You want to prevent the problems with Signal, Tor, Bitcoin, etc. This means, no "50%" problem like Bitcoin, no monitoring of exit nodes like Tor, no centralized distribution issue like Signal.
Imagine:
Alice "sends" a message to Bob by creating an account on Reddit and posts a cat meme which has the hidden text (steganography).
Bob knows how to find the text in that cat meme, and responds by posting something on Twitter, which Alice can read and decrypt.
All this is deniable (I didn't get anything from Alice!), available (e.g., Twitter goes down), and secure.