The term “Big data” related to data that is huge in amount, fast to
access or complex. A huge amount of data is generated day by day.
The Big Data and its analysis play an important role in the world of
IT with other applications like cloud computing, data mining, IoT
etc. As the internet and digital technologies are growing, the amount
of data is also increasing day by day. But this amount of data cannot
be processed by using traditional methods. A lot of effort is required
to analyse this amount of data. But while ensuring data security and
privacy, many challenges are there like protection against security
breaches and data leakage, vulnerabilities in public databases and
third-party data sharing etc. The objective of this paper is to discuss
various applications and security issues with Block chain solution of
Big Data challenges.