How blockchain could prevent Equifax-alike situations from happening in the future

Great article by Michael Mainelli in the Harvard Business Review, advocating in favour of blockchain as an alternative to national identification systems in order to prevent situations such as the Equifax data breach: https://hbr.org/2017/10/smart-ledgers-can-help-us-reclaim-control-of-our-personal-data

Mainelli highlights the example of Estonia and its ID-kaarts, which use a distributed ledger to build their system, rather than a traditional central database.