Blockchain technology represents a milestone in the field of technology when it comes to security and data protection. When discussing about blockchain, we should think of it as a multi-layered puzzle because it is composed of an amalgamation of pre-existing technologies. Each technological layer comes on top of each other and as new layers are introduced, we start to see what we define as blockchain.
To understand how blockchain can improve security, it’s imperative to examine its core characteristics and how they come together to form an infrastructure that has the potential to reshape our perception concerning database security in general.
As opposed to traditional systems which upload data to a cloud server, or store it in a single location, blockchain improves database security by breaking all the information into small chunks and distributing them to every node which builds the network. This is why blockchain is referred to as a decentralized, all the data is distributed across the entire network, there is no central storing point which can be tampered with. Every computer/node which is part of the network has a copy of the ledger, which means that in order to successfully hack this type of system, you would need to hack at least 51% of the nodes simultaneously, task which is virtually impossible considering the amount of computational power, energy and time needed.
Decentralized systems add a whole new layer of security to the availability of an IT infrastructure. Everything that occurs on a blockchain network is encrypted and data can easily be verified to determine if it was altered. Because the whole infrastructure is distributed, you can check all file signatures across all the ledgers on all the nodes to see if it was changed. If a record is modified, the system renders the signature invalid. This unique combination of characteristics and the design of its architecture make blockchain an ideal vehicle through which companies can streamline database security.