Blockchain technology ensures data security through an integrated system whereby it collects, arranges, stores, and disseminates information in different blocks. This technology thus enables adding the data to the network. Once data has been added to the network, no one can alter the data set either by adding or deleting it. Further, this technology also helps to track and check the changes if anything is made to a blockchain, as the changes remain in the database forever. Since this technology uses lots of systems in a blockchain, it will regularly download its data, arranging, and keeping the copy locally. Locating the data errors and cyberattacks in advance by analyzing the data documented, it employs the consent of various participants and accomplishments in cryptography. With this backdrop, the chapter has attempted to disclose the basics of blockchain technology in data security, why blockchain in cybersecurity, how it ensures cybersecurity, its benefits, its innovative uses, and the future of cybersecurity in the online business platforms.