⚙️How blockchain works

Blockchain is a decentralized database distributed across multiple peer-to-peer servers.

It takes the form of an immutable register in which blocks of transactions are added and verified sequentially using a consensus mechanism. Each block contains a set of transactions, such as the sending of a message by a connected object in the case of CONNECTIFY. These transactions are validated and encrypted by network peers using complex protocols, making them tamper-proof and traceable. Each transaction or message is given a unique hash, a fingerprint that identifies it and guarantees its integrity. The blockchain register containing the secure history of all messages and transactions is duplicated on each peer server.

This massive distribution makes any retroactive modification impossible without altering the coherence of the whole, bringing decentralization and resilience.