Attribute-Based Attestation: A Deep Dive
Blog post from Didit
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Attribute-Based Attestation (ABA) is a privacy-focused digital identity approach that lets people prove specific claims, such as being above a required age or holding a qualification, without disclosing underlying personal data like a birth date or full identity document. It commonly uses cryptographically signed Verifiable Credentials from trusted issuers, Decentralized Identifiers, and zero-knowledge proofs, which can validate an attribute without exposing additional information. By limiting the collection, transmission, and storage of sensitive data, ABA can improve user control, reduce fraud and breach risks, and support interoperability through W3C standards. The process generally involves credential issuance, user presentation, cryptographic verification, and optional selective disclosure, although it requires protections against compromised issuers, cryptographic vulnerabilities, and replay attacks. Didit says it is incorporating ABA into its identity platform through credential issuance integrations, a digital credential wallet, selective-disclosure tools, and a verifier API intended to help businesses implement privacy-preserving verification.
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