  The modern society, economy and industry have been changed remarkably by many
cutting-edge technologies over the last years, and many more are in development
and early implementation that will in turn led even wider spread of adoptions
and greater alteration. Blockchain technology along with other rising ones is
expected to transform virtually every aspect of global business and
individuals' lifestyle in some areas. It has been spreading with multi-sector
applications from financial services to healthcare, supply chain, and
cybersecurity emerging every passing day. Simultaneously, in the digital world,
data protection and privacy are the most enormous issues which customers,
companies and policymakers also take seriously into consideration due to the
recent increase of security breaches and surveillance in reported incidents. In
this case, blockchain has the capability and potential to revolutionize trust,
security and privacy of individual data in the online world. Hence, the purpose
of this paper is to study the actual cases of Blockchain applied in the
reformation of privacy and security field by discussing its impacts as well as
the opportunities and challenges.
