I think one of the many interesting bitcoin (or alt) applications that could be done with blockchain technology could be is Passcoin or Pwdcoin or Passwordcoin.

At the moment we have very unreliable methods to store the many thousands of passwords that people keep to use internet. Some use LastPass, or some other use Keepass

Both are unreliable. Lastpass is centralized in a country where the state can request to have a backdoor and not let anybody know.
Keepass cannot be stored on the internet easily. In case your house burns, or you get kicked out of your house by your wife, you are bombarded or you have to cross a frontier (almost nude and without belongings) you will lose all your digital life.

I think a math proof encryption method to just store a few hundreds of passwords or even just a master key that generates many hundreds of different possible passwords aka deterministic wallets (but applied to password conventions instead of bitcoin addresses) could have a huge impact as millions would use such technology.

If somekind of deterministic method to generate passwords from a master key could be included into bitcoin it would be wonderful.

A non centralized controllable store of passwords or secrets that is persistent and cannot be shut down  and no nsa risks.


Just a thought. Any opinions?