No, encryption is for keeping secret a secret, even if it ends up public. But this misses the point. Blockchain is an implementation of a specialized cryptogra

No, encryption is for keeping secret a secret, even if it ends up public. But this misses the point. Blockchain is an implementation of a specialized cryptographic primitive called "document timestamping". Nothing this primitive provides is useful for a password manager. About the only thing that would be useful is much better served with a DHT, and much cheaper, too.