What are the benefits of using Zero-Knowledge Proofs (ZKP) for identity verification?
Our Fintech company is looking for a way to comply with "Know Your Customer" (KYC) regulations without actually storing our users' sensitive documents like passports or social security numbers on our servers. We’ve heard that Zero-Knowledge Proofs (ZKP), specifically zk-SNARKs, could allow a user to prove they are over 18 or a resident of a certain country without revealing their actual date of birth or address. Is this technology mature enough for production use in 2024? What are the computational requirements for the user's device to generate these proofs, and are there existing identity providers like Polygon ID or Worldcoin that we can integrate with?
2024-01-05 in Cyber Security by Mary Taylor
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All answers to this question.
ZKP technology has matured significantly and is absolutely ready for production. Using zk-SNARKs (Zero-Knowledge Succinct Non-Interactive Argument of Knowledge), a user can generate a proof on their smartphone in just a few seconds. The beauty of this "Self-Sovereign Identity" model is that you, the service provider, only receive a "True/False" response to your query (e.g., "Is user > 18?"). You never hold the toxic asset of PII (Personally Identifiable Information), which drastically reduces your GDPR liability. I’d recommend looking into the Iden3 protocol or Polygon ID—they provide ready-to-use SDKs that handle the heavy cryptographic lifting so your devs can focus on the business logic.
Answered 2024-01-05 by Jessica White
If the user loses their "private key" or the device that holds their identity credentials, what is the recovery process in a decentralized ZK identity system?
Answered 2024-01-07 by Christopher Lee
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Recovery is the "Achilles' heel" of decentralized ID, Christopher. Most systems now use Social Recovery, where a user designates a few "guardians" (friends or other devices) who can sign a transaction to help the user regain access to their identity. Some are also experimenting with "MPC" (Multi-Party Computation) so that the key is split into fragments, and the user only needs 2 out of 3 fragments to reconstruct it. It’s a bit more user-friendly than the old "write down your 24 words" approach that caused so much lost crypto.
Commented 2024-01-08 by William Anderson
We integrated ZK-proofs for our voting app. It allowed us to prove a user was a registered member without ever knowing which specific member was casting the vote.
Answered 2024-01-09 by Elizabeth Walker
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Elizabeth, that's a perfect use case. It shows how ZKPs can solve the tension between "accountability" (knowing a person is authorized) and "privacy" (not knowing exactly who they are).
Commented 2024-01-10 by Mary Taylor
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