With the development of technology in the 4th century, it can be seen from before the christian period (SM) such as the compass, calendar, pozzolana and wheel. And now the world is about to undergo a tremendous transformation. In this extraordinary change there are inventions such as printing machines, machines, digital computers, vaccines, telegraph technology, ironing tools, airplanes, and even the internet. With this discovery, the world underwent a tremendous transformation from the previous century, due to technological advances over time. Inventions made before Christ must take a long time, even centuries, but making changes today only takes a few years. But in this study, we will describe blockchain technology even centuries, but by making changes now it only takes a few years. But this research will describe blockchain technology. On Facebook, which has a new change to the concept of decentralization, but this concept is still somewhat contradictory to the current world system, so why do users need intermediaries, namely third parties to keep the transaction secure? This research will provide answers to arguments starting with a conceptual understanding which will then go through the stage of case study stages in various industries such as administration, banking, chain management, intellectual management, transportation, even asset management, logistics and energy materials. With blockchain technology, it is used to describe blockchain technology and technology that humans do everyday. There is a concept of a ledger that undergoes a gradual transformation carried out by Satoshi Nakamoto, who has a triple entry ledger that is used to master blockchain technology. In blockchain technology, it has cryptography that is useful for avoiding money laundering, knowing customer activity, knowing all banking transactions and even administration in storing people's identities. In this case study, we will discuss big companies such as IBM, Amazon, Maersk, and even a kind of startup like Ezremit and Signazy. And in this administration section it is important to identify global educational techniques and develop technology in a better direction so that it can advance society in Indonesia and blockchain technology is included in technology that advances future change.

In the public key infrastructure, the certification authority is fully trusted, and the security of the public key infrastructure depends on the trust of the certification authority; however, recent attacks and corruption on the certification authority indicate that the certificate is forged when the certification authority fails . New solutions, blockchain-based public key infrastructure products and registry can repair vulnerabilities in public key infrastructure, especially weaker security systems. Proposals for infrastructure-based public key infrastructure. Public keys are still the target of global attacks. According to the registration of the target victim, it is signed as a temporary public key infrastructure based on the blockchain. High growth rates require permission to use the wallet. To solve this problem, this document introduces an integrated and responsible system for managing security certificates at the transport layer that represents the next generation of public key infrastructure.I merged two new architectures, introduced a new process, and created a registration and CA server. The domain owner has been notified. In supply chain management, the domain certificate signed by the CA is stored on the registration server, and the certificate server and the CA registration server are forwarded to the group that owns the domain. Compared with existing supply chain public key infrastructure products. The above-mentioned blockchain-based public key infrastructure scheme and registry are used for security and governance analysis.