Is there a blockchain, or a smart contract designed to store user passwords?
I am using a proprietary password manager and have hundreds of passwords stored there. I am just a bit worried that the service once goes down and I lose all my passwords (including encryption keys of crypto wallets). With a blockchain-based solution, the risk of this happening should be decreased in my opinion.
Best Answer
You don't need a blockchain in order for it to be open source (and you shouldn't use blockchains to store private data, as explained by CPereez19). Instead, why not consider a local password manager such as KeePassXC or Pass? You can still rsync it or store it in a generic cloud storage solution if you want synchronization.