I started this book with the idea that readers who would get through most of the chapters would also be interested in the future of real-world cryptography. While you’re reading an applied and practical book with a focus on what is in use today, the field of cryptography is rapidly changing (as we saw in recent years with cryptocurrencies, for example).
As you’re reading this book, a number of theoretical cryptographic primitives and protocols are making their ways into the applied cryptography world—maybe because these theoretical primitives are finally finding a use case or because they’re finally becoming efficient enough to be used in real-world applications. Whatever the reason, the real world of cryptography is definitely growing and getting more exciting. In this chapter, I give you a taste of what the future of real-world cryptography might look like (perhaps in the next 10 to 20 years) by briefly introducing three primitives: