# Identity Verification

Traditional identity verification struggles with privacy concerns, centralized storage risks, high costs, time-consuming processes, data inefficiencies, lack of interoperability, compliance complexities, and fraud risks. zkTLS enables users to prove eligibility without revealing specific details, ensuring seamless privacy compliance. Some typical examples include age-like verification and reusable verification.

![](/files/NuGIBKX03YQP3vnCKCzp)

## Age-like Verification

Personal information like age, location and nationality, is very sensitive and considered as core factors of identification risks. NexaID' zkTLS technique achieves complete data minimization, which only provides the final result after applying the computable condition to the sensitive data. For instance, an age attestation can provide the satisfiability towards a gaming service to ensure age compliance, without disclosing the exact age or birth date.

As long as the sensitive data is an input to a computable function, the verification can be well constructed by using ZKP. Other examples include:

* one can provide proof of eligible nationality, by cryptographically showing the user's nationality is NOT in the blacklist which may contain a couple of restricted countries and regions.
* one can provide proof of qualified address to confirm the user's area falls in the designated region.

## Reusable Verification

Proof of Humanity (PoH) is crucial in ensuring that online participants are genuine individuals rather than bots or fake identities. Existing PoH methods, such as CAPTCHA and hCAPTCHA, focus on human verification tests to achieve Sybil resistance for Web3 applications.

NexaID introduces a new approach to PoH by re-using existing identity/KYC results. For example, consider the case of Alice, an active Twitter user seeking access to a chat service provided by a new decentralized social protocol. NexaID can create an attestation for Alice after verifying that she has posted more than 100 tweets within the last quarter. This attestation can then be re-used by the new protocol to ensure Alice's humanity, utilizing the verification results from NexaID.

NexaID' innovative solution enhances Web3 identity systems by reducing trust assumptions and integrating specialized verifiable attestations. By binding these attestations to specific Web2 data sources, NexaID ensures authentication and privacy preservation. Additionally, NexaID introduces a new type of Proof of Humanity by leveraging existing identity/KYC information, enabling the creation of more secure and trustworthy Web3 applications.


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