Someone on the thread about DAOs mentioned the problem of maintaining one vote per member, which I would suppose come down to ensuring one member per person?
An idea I've been thinking of for a while now is to figure out some means of tying accounts to iris scans (as iris scanners get cheaper, this may become feasible), with the iris scans acting as a unique "username", and a private passphrase to access the account. However, the problem with that is preventing people from sending fake data and creating multiple accounts. The solution I've seen suggested for that is to verify them in person, by using other peoples scanners whenever meeting in person - so when you meet them in person, they would scan your iris and check that the hashes match, verifying that it is indeed your data, and the more this occurs, the greater the confidence others can have that it is the "true" account that you have. I presume some sort of web of trust could be implemented, so you could track verifications through the system - so you know that the person you are interacting with has been verified by Alice, who was verified by Bob, who your friend Charlie has verified...
- You create an account using your iris scan
- The next time you meet someone, they verify that it is your account using their own scanner
- Someone who has that person as a trusted introducer (?) will now be able to be confident that you are a real person
- Over time, as more and more people verify you, there will be a wider circle of people who trust you to be an actual person.
It would still be vulnerable to large groups of trolls verifying each other, but that should show up as an unusually tight circle of accounts, that would result in a low rating for them.
Possible applications? The one I proposed was for an AltCoin that implements autotaxation and a basic income, to prevent individuals from setting up multiple accounts and taking more than their share, but it could be used for anything requiring identification. The one proposed was for verifying that the person you're dating is actually who they claim to be. The account would contain whatever identity information you chose to give it - age, sex, name etc - and would rely on people you meet to verify that you're telling the truth. Probably have some means to change the data, but do remember that it would remain in your history regardless...