The key strength of blockchain technology and bitcoin in particular is a distributed registry. In blockchain technology, data is stored not on a central server, but in a huge network of computers that constantly checks the accuracy of records. This greatly complicates hacking: a hacker will have to hack a huge number of servers to change the information. Thus, in order to be able to fully control the blockchain, a person needs to gain access to all servers or nodes at the same time, which in ...