Blockchain technology is a distributed ledger system where each transaction is verified across
multiple computers in a secure way, making it impossible to hack or change.
It works by creating a continuous chain of blocks, each containing a record of the previous
transaction.
The blockchain is secured via a consensus mechanism known as “mining,” where the nodes of the
network are incentivized to validate transactions and create new blocks.
This makes it virtually impossible for anyone to tamper with the data stored on the
blockchain, or to make unauthorized changes. Also, due to its distributed nature, there is no
single point of failure.
That means if one node goes down, the other nodes will continue to operate without
interruption.