In a blockchain, the blocks of information are connected in a chain to record transactions and track assets. The assets can be tangible (a house, cash, etc.) or intangible (intellectual property, patents, branding). Blocks in blockchain can store numerous types of data, such as the originator and recipient information when exchanging Bitcoin. Through blockchain, trustworthiness and visibility to data is achievable. It boosts the safety, effectiveness and trackability of data shared through a business network. Being decentralized, this system of information sharing is impossible to modify. Furthermore, records are unchangeable and certified by an impartial body. Blockchain, a novel technology, has now been utilized in the real estate sector. Governments and healthcare establishments have adopted this technology in order to make their contracts smarter.

Keywords : Blockchain, Security, Online Sales and Business, Medical and Health Industry.