Blockchain based cyber security solutions for national security

Today, Internet connected computers have entered every fields of our life from the smart watch to the Automation Systems of Factories (SCADA). This expansion of the Internet makes cyber attacks the most dangerous crime that threatens our personal and national security. Cyber attacks, which have gained the ability to directly aim the critical infrastructure of the states, have caused a total of $600 billion global economical collapse in 2017. Developments in technologies that use the internet environment, such as cloud computing and IoT, make the management of the risk in the cyber environment more and more difficult. In recent years, the other cyber security element that stand out in the processes of the challenges of crime detection and forensics are the indisputability and controllability. Blockchain is the new generation of technology that can eliminate all these security problems by means of its blockless, distributed architecture and irrevocable registry which keeps the transactions performed. This technology provides more robust solutions against attacks than the central server architectures with its distributed framework. In this work, the function of the blockchain system is discussed, new approaches of the studies in this subject about security and how these solutions can be developed for the cyber security is examined. By using the blockchain, a model has been formed that can serve as a model for providing information security in national critical infrastructures and is implemented by coding in Hyperledger-Fabric. In this context, deductions were made for areas where the use of blockzincirin would be possible in ensuring national security.