I was having a kind of thought experiment...
Let's say that you create a new crypto-currency. Before the creation of the first genesis block you create 25 billion wallets with each 1 coin in it. The purpose of this would be that anyone on earth, could claim his 1 coin at anytime.
My question:
How would you prevent that someone claims more than 1 wallet?
PS: I didn't incorporate more details because this is not necessary for the question at hand.
To enumerate these are the steps.
1. Record an image of thermograph of the person who are suppose to use the wallets.
2. Put it in the blockchain.
3. Only the person with that unique thermograph pattern will be able to use the wallet.
4. All others will locked out of the wallet.
Wouldn't a termograph image change all the time? Environment could influence the image (is it hot or cold). Someone who just did a workout, long walk, hot or cold shower or whatever would produce a different image. Someone who gain or lose weight would have a different image.
Even if it would be unique and don't change over time, how do you get all those images in a trustful way to the blockchain? How can you prevent uploading fake images?
Would you need to confirm your image for every transaction or only for the initial spread?