The Review and Comparison between Centralized and Decentralized Digital Identity Systems

The growing capability of the digital world empowers physical objects to possess much more digital assets than they ever had, and the concepts of the Internet of Things and the Industrial Internet are coming out continually. Digital identity, a unique mark of two-way mapping, dynamic interaction between physical and virtual objects, is one of the fundamental elements among these novel concepts because it is the only way to distinguish each other from hundreds of millions of digital objects. In order to create a world with everything connected on the Internet, plenty of digital identity-orientated systems were raised, and new frameworks are emerging iteratively. To the best of our knowledge, this review lists some of the most applicable digital identity-based solutions by giving mechanism, digital identity solution, feature, and comparison between these models.