A blockchain is public. You want everybody's credit public?
No, blockchains are magic technology that makes money appear out of nowhere and hides all activity from evildoers.
The data isn't public if it's in encrypted form. When you apply for credit, you'd decrypt it with your own private key and re-encrypt it with the creditors private key and send it to the creditor, they would then decrypt privately, process the application, and discard the data.
> you'd decrypt it with your own private key and re-encrypt it with the creditors private key and send it to the creditor
Creditor's public key, not private key.
Yes, goofed on that one.
Well, ethereum doesn't exactly have that good of a security record.