Imagine a world where medical records are part of a blockchain. They're decentralized, secure, publicly available, encrypted, and only shared with interested parties.
Now imagine someone finds a flaw in the software that a company uses to access the data in the blockchain. The 200K records "United Valor Solutions" has access to are read by an attacker and leaked on to the internet.
How is the Web 3.0 version better? If someone can access the data in the blockchain then an attacker can use that same mechanism and the legitimate access credentials to exfiltrate data if it's not secure. There is no magic solution to this problem.
Now imagine someone finds a flaw in the software that a company uses to access the data in the blockchain. The 200K records "United Valor Solutions" has access to are read by an attacker and leaked on to the internet.
How is the Web 3.0 version better? If someone can access the data in the blockchain then an attacker can use that same mechanism and the legitimate access credentials to exfiltrate data if it's not secure. There is no magic solution to this problem.