The blockchain is a ledger distributed among all the nodes in the network and, as such, tampering with the data stored in it is extremely complex and difficult, virtually impossible. It offers the advantage of a system inviolable to any attempt of misuse, alteration or theft of information and personal data.
Blockchain is a technology based on an increasing number of blocks that are securely linked together, partly thanks to cryptography. Each block contains the transaction data, a hash of the previous block to which it is linked and a timestamp. In blockchain technology, every time a block is validated and added to the chain through a proof-of-work based system, it is also distributed to all the nodes in the network.
The efficiency of blockchain comes from the absence of intermediaries. This technology allows individuals and organizations to directly perform exchange transactions and have them recorded on the chain.The immutability and decentralization of the registry, which is distributed on all the nodes of the network, allow the creation of a chain of data that does not require additional trust either between the parties or through a third party guarantor.