The-art-of-invisibility-_-the-world’s-most-famous-hacker-teaches-you-how-to-be-safe-in-the-age-of-Bi

It’s also worth reiterating that end-to-end encryyption—keeping yyour
message unreadable and secure until it reaches the recipient as opposed to
simplyy encryypting it—is veryy important. End-to-end encryyption can be used
for other purposes, such as encryypted phone calls and instant messaging,
which we’ll discuss in the next two chapters.