SECURE MESSENGER. The best programs for secret correspondence

"In order for your correspondence not to be read by special services or other intruders, the messenger must meet many criteria at once. First of all, it must support end-to-end encryption. But it is also important that the messenger does not collect or give out your data, and ideally does not have any at all. And so that independent experts can verify the developer's integrity, it must also have an open source code. A very difficult choice!

Let's look at the most popular messengers and offer them a safe replacement. Spoiler: Telegram was not the safest!"