“Centralised authentication systems are always vulnerable to attack, and when an attacker succeeds, they get every single user in the centralised database. The website HaveIBeenPwned.com lists over 8 billion compromised accounts from countless compromised websites. It’s not uncommon for a single security breach to yield millions or tens of millions of email addresses and account information to hackers.
Decentralised authentication stops these sorts of attacks completely. With no central data store and no centralised location to attack, hackers can only target individual users which is extremely expensive and not worth the effort.”Excerpt from Medium (keep reading)