The original blockchain underpinning digital currency bitcoin is kept secure by data being shared across a global network of computers, which are incentivized by competing to win new bitcoins in a system know as “mining”. But while there have been worries about its irreversibility, some technologists argue that it is a feature that makes blockchain unique and that without it, the term becomes meaningless.
“An editable blockchain is just a database. The whole thing about blockchain is that it’s immutable, so this just defeats the object.”” Gary Nuttall, founder of blockchain consultancy Dislytics, told Reuters at a blockchain conference.
Source: Accenture breaks blockchain taboo with editing system | Reuters