  Recent developments in hardware and information technology have enabled the
emergence of billions of connected, intelligent devices around the world
exchanging information with minimal human involvement. This paradigm, known as
the Internet of Things (IoT) is progressing quickly with an estimated 27
billion devices by 2025. This growth in the number of IoT devices and
successful IoT services has generated a tremendous amount of data. However,
this humongous volume of data poses growing concerns for user privacy. This
introductory chapter has presented a brief survey of some of the existing data
privacy-preservation schemes proposed by researchers in the field of the
Internet of Things.
