How does the blockchain technology apply to the real world service? If I would like to have a blockchain technology on a supply chain service, which means under this technology, each block contains all the logistics information like storing a transaction from Singapore to Hong Kong right? So then it is just act like a database but just public can view it? then why should I necessary to develop such a service on blockchain but not continue using centralized database technology, only allow permission for beneficial stakeholders?
Please correct me as I am having a very messy concept on this topic right now.... Thank you~!
If a logistics or a supply chain company will adopt and used blockchain technology, it might not be public, it will be privately control by the company itself. And yes you are right that is like a database of sort. The main difference though is that Database can be manipulated while once the block is written it can't be altered. So it prevents creating duplicates and data is validated instantly. Another advantage is again since data can't be altered, so it allows the traceability of data from the front end up to the release of the product so its tamper proof guaranteeing the integrity of the product itself.
And just think how quickly the blockchIn would grW to an unmanageable size. With a database you can archive old data.