Block-chain app/solution alternative of lastpass, 1password,

I recently needed to share password, but I wanted my buddy to login without letting him know the password.
Then I found out solutions like lastpass, 1password, keeper, lastpass pocket etc. from the following websites:

This ranking of similar solutions also is good:

Then I found that already people started thinking similarly. There is also a nice discussion on whether there is decentralized solution?

Can't we create a blockchain of encrypted password? Can we use ethereum contract? Let's have discussion. Or, is putting password on blockchain an insane idea?
I think keepass is the closest to what I can think of, because instead of storing in a centralized server, they keep it locally.


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