The reason why conventional forms of security fail to address the issues of fluctuating big data systems space adequately. Instead,the use of blockchain technology which is a decentralized and entirely transparent and unalterable can provide a proper solution towardthese problems. Based on the above Introduction, this paper aims at discussing the application of implementing blockchain security in bigdata systems. In other words, if data is stored using blockchain, it is very easy to prove as to whether the data has been manipulated or not.Due to the distributed nature of the blockchain, there is also a consideration of the fact that it eliminates the possibility of having singlepoints of failure as a weakness for big data systems. In addition, smart contracts on the blockchain platform can fulfill and enforce datagovernance policies and regulatory compliance. This paper also presents an analysis of the state of the art of the existing blockchain-basedsecurity solutions, their strengths and weaknesses and a vision of the opportunities for further research. The combination of aspects ofblockchain technology and big data systems means the possibility of radical changes to data processing to heighten confidence and securityin the processing of valuable and security-sensitive data.Keywords: Blockchain, Data Integrity, Privacy, Big Data, Security.