5 ms·
> First, retina scanning output hash is deterministic - it is supposed to generate the same result for the same eyeball. So it can't be replaced with random num
by drexlspivey 5y ago
> First, retina scanning output hash is deterministic - it is supposed to generate the same result for the same eyeball. So it can't be replaced with random number generation.
His argument is valid, what stops you from replacing the retina scan with a random hash replicating a different person scanning each time and collecting new tokens? What ties the hash to the actual retina other than the device that you can mess with?
- Tenoke 5y agoPresumably the orbs produce a verifiable type of hash. E.g. whatever output it has is also encrypted with their private key + some salt and you can always check if what a user provides has that.
- New_California 5y agoYou don't understand what a hash is.
- ta23adesrg 5y agoYour confidence in your own reading comprehension is unjustified. They are simply describing signing the hash.
- exo762 5y agoIt can be done in following way. Orb can have a baked-in private key (on hardware level). Public keys are stored in the blockchain. Each hash is signed by the private key stored in the orb.
- mhluongo 5y agoThat implies a centralized signing authority though. We could do all of that without the retina scanning using normal old KYC
- Tenoke 5y agoThe orbs are centralized either way. And I personally am less worried about someone having a hash of my eyeball data than my passport and everything else.
- gcr 5y agoThat's orthogonal to the point. Here's the scenario: 1. User has a "fake" biometric A, generated via GAN or [1], that's cheap and easy to produce. 2. Suppose they can present A to any orb device, generating hash(A), which signs hash(A) using its built-in private key as usual. As long as the user can generate a fake iris biometric scan accepted by an orb, no other part of the system needs to be compromised for this attack to work. 1: http://iab-rubric.org/papers/ICPR14_1649_FI.pdf http://iab-rubric.org/papers/ICPR14_1649_FI.pdf , note that liveness detection is a cat-and-mouse game
- exo762 5y agoSee my original post. It's pretty clear that process of initial distribution of tokens is not open. Volunteers are likely contributing lots of private data to the company to get their hands on orbs.
- yissp 5y agoWould it not just be a matter of time until the orbs are reverse-engineered and you can sign arbitrary input? Especially if this currency were to actually gain significant popularity.
- ThePhysicist 5y agoDRM magic inside the Orb.
- gcr 5y agoWho's to say that employees (physical orb administrators) won't be in on it?
- user-the-name 5y agoThis is a cryptocurrency project. The opportunity for scamming is much, much bigger than that.
- TechBro8615 5y agoQuality shitpost. We’ve really come full circle when a blockchain relies on DRM to work.
- _jal 5y agoIt is a thing of beauty. "The DMCA says you aren't allowed to circumvent our attack on a central pillar of the modern nation state."
- mNovak 5y agoI've got it, we need kernel-level anti-cheat...