How digital identity on blockchain can contribute in a smart city environment

Nowadays, in this digital world, one of the biggest concerns for business and many other public entities, is to know precisely the “identity” of the users that are behind of their systems. Since the data can define a person, there have been many tries to develop technology to determine accurately who the users are and certify their basics attributes like name, address, credit record, as well as other personal characteristics like health status, hobbies and others. That is why Digital Identity has taken a significantly important role in this area and becoming as a crucial security measure in this interconnected environment. This research is a systematic mapping review with the goal of collecting all relevant existing research of Digital Identity on Blockchain technology implemented in a smart city environment. The objective of this paper is to understand the current research topics, challenges and future directions of these areas from the technical point of view. It is expected that this paper can stimulate interest in theory and practice to further discussions and research in these areas.