block chain - the future is near

block chain is a continuous sequential chain of blocks built according to certain rules. What is it for?
Many  thought that this was due only to the crypto currency, but this is far  from being the case, it is a new technology for transferring information  between several users, it provides the greatest security of information  at the moment. Google plans to create its own block chain to improve the location. To  date, the most secure block chain in IOTA, it will be possible to crack  it only with a quantum computer, this system provides greater network  security.