What is Decentralized Identity (DCI)?
Decentralized Identity (DCI) is an approach to digital identity in which individuals and organizations hold and present their own cryptographically signed credentials, without relying on a central identity provider to store or validate them. It is used to reduce dependence on siloed identity databases and give credential holders direct control over what they share and with whom.
What it does
Decentralized identity systems replace the traditional model, where an identity provider holds your data, with a model where the credential holder stores their own credentials in a digital wallet. Key mechanics include:
- Verifiable Credentials (VCs): Issuers such as governments or employers sign credentials cryptographically. Holders present them. Verifiers check the signature without calling back to the issuer.
- Decentralized Identifiers (DIDs): W3C-standardized identifiers anchored to a blockchain or distributed ledger, not to a central directory.
- Digital wallets: Software that stores VCs and presents them on demand, often on a mobile device.
- Selective disclosure: Holders can prove one attribute, for example "over 18", without revealing their full credential.
Products in this category manage the full lifecycle: issuing credentials, revoking them, and verifying them at the point of access. Some tools also cover IoT device identity using the same Self-Sovereign Identity (SSI) standards.
Why teams buy it
- Regulatory compliance: Standards such as eIDAS 2.0 in the EU require interoperable digital identity wallets for citizens and enterprises.
- Reduced breach surface: No central credential store means attackers have no single database to steal.
- Reusable identity verification: A user verified once by a trusted issuer can reuse that credential across many relying parties, cutting onboarding friction and cost.
- Interoperability: W3C VC and DID standards let credentials cross organizational and national borders without custom integrations.