This study focuses on dealing with various kinds of issues related to privacy in the particular context of big data which is basically a huge urgent requirement for all the people. It discusses the sources of big data, security challenges of big data, and security of big data. The study concludes that for safeguarding the big data, there is not only the need of huge number of technologies of information security but also a lot of awareness of the protection of privacy of various citizens in the country are required to be greatly strengthened for the implementation of the security of information.