The risk to organizations from attack has increased exponentially. Threats can occur at any point on the internet where there is a potential weakness that hackers can exploit using different types malware. Blockchain technologies is one of the most popular in recent years, it has already changed people’s lifestyle in some area due to its great influence on many business or industry, and what it can do will still continue cause impact in many places. It changed the way organisations operate both within Australia and globally. Blockchain is valuable to the economy, organizations need to understand how it works. In this assignment, you have to study and evaluate the security issue and challenges related to Blockchain by writing a report to discuss the follows: 1. Introduction of blockchain technology. 2. The working mechanism of blockchain 3. Application the blockchain can support. 4. Demonstrate how the confidentiality, integrity and availability (CIA) can be achieved using the blockchain. Support your discussion with examples. 5. Discuss the support hashing technique provides in the implementation of the blocks in the blockchain. Support your discussion with block diagrams. 6. Highlight the capabilities and limitations of blockchain technology 7. Discuss the future of blockchain technology in business and particularly in banking industry. 8. Summary of your report 9. References in Harvard style.