Ethereum based Proof-of-Individuality prevents sybil attacks

crypto_future
Decentralize.Today
Published in
3 min readApr 9, 2016

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The Proof-of-Individuality project recently released a whitepaper that describes how they plan to deploy decentralized sybil proof using anonymous strangers. They describe it as a ‘web-of-strangers’ or an ‘inverse web-of-trust’ and describe it as being trust-less — you trust the algorithm and you don’t need to trust the strangers that you verify.

An algorithm pairs you together with four random people from the internet, and you hangout together for 15 minutes. While you’re in your hangout, everyone else on the planet will be doing simultaneous hangouts. Since all hangouts happen simultaneously, it’s impossible to be in multiple hangouts without others in those hangouts noticing that you’re splitting your attention.

This is what the POI tokens look like within the official ethereum-wallet

The system claims to be anonymous, since the sybil proof you receive comes in the form of an anonymous token, and as you hangout with new strangers each month, you get a new token that is not traceable to your previous one, registered on a new private key. And since you’re interacting with strangers, it’s not less private then just talking to random people on the street.

Anti-spam deposits prevent a single party from controlling n-x total accounts

The whole system will run on the ethereum blockchain, currently backed by a 0.6 billion US dollars in market cap.

For those of you who read code, here’s the first draft of the system.

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