Contents 1. Introduction
Privacy is one of the most important civil rights. Although there are many aspects of privacy, we focus on one of these aspects: the ability to prevent other parties from learning one's current identity by recognizing his/her personal characteristics. In recent years, advanced digital cameras and computer vision technology have been widely deployed in many circumstances. While these technologies provide many conveniences, they also expose individuals' privacy. As private organizations and governments collect, store, and analyze massive amounts of surveillance data, individuals are increasingly vulnerable to privacy threats. In particular, individuals risk exposure to identity theft, reputation damage, and loss of personal privacy if their information is disseminated in violation of data protection laws or their own privacy preferences.
