  Securities exchange being digitalised and online, security of information and
data has become a major concern. Blockchain (BC) technology, being distributed
and immutable in nature, has proved to the "Trust Machine" eliminating the need
for third-parties. Authors of this paper investigate how Blockchain can be used
to secure stock exchange transactions, with an especial focus to the
technological as well as legal aspects of such applications. Considering the
intricate operational structure of the securities exchange, the research
proposes to design, develop and implement a hybrid BC, customised according to
the need of the respective stock exchange. The study suggests that the use of
such BC can bring many benefits which the other technologies currently being
used cannot offer. However, during the design process of any such application
using BC, the relevant laws and regulations of the corresponding country need
to be considered.
