The blockchain is a record that is annex just: in other words, information must be added to it. When data is included, it is incredibly hard to change or erase it. The blockchain implements this by remembering a pointer to the past square for each ensuing square.
The pointer is really a hash of the past square. Hashing includes going information through a single direction capacity to deliver an interesting “unique mark” of the information. On the off chance that the information is altered even marginally, the unique finger impression will look totally changed. Since we chain the squares along, its absolutely impossible for somebody to alter an old section without nullifying the obstructs that follow. Such a structure is one of the segments making the blockchain secure.
