Decentralized identity(DID): what it is and why it matters
A decentralized identity (DID) is an identifier the user controls with their own key. In Block-Auth, each user is a cryptographically verifiable DID in your backend: you hold no passwords and identity is reusable. It’s the foundation of passwordless.
Password databases are a target
Every credential you hold is a risk: if it’s stolen, all your users fall at once. Decentralized identity removes that central store of secrets.
Authentication returns the DID
The flow returns the user’s address/DID.
Your backend validates the signature
A call to isAddressSigned() checks it’s valid.
Reusable credentials
Users present verifiable credentials across apps.
Everything a decentralized identity gives you
Cryptographic proof of identity, user control and portability.
Verifiable DID
Each user is an identifier you can check in your backend via cryptographic signature (isAddressSigned), with no secrets held. The user controls their key; you only verify.
Verifiable credentials
Signed attributes the user presents when they choose.
Selective disclosure
Prove “over 18” without showing the whole document.
Reusable
The same identity signs across several apps in the ecosystem.
eIDAS 2.0 / EUDI
Aligned with the European Digital Identity Wallet.
Identity hosted in the EU, sovereign by design
INFINITY is ready for eIDAS 2.0 and the European Digital Identity Wallet (EUDI). Your data and your customers’ data stay in Europe.
- General Data Protection Regulation (GDPR)
- eIDAS 2.0 / EUDI Wallet
- Verifiable credentials
- Data hosted in the EU
Give your users a sovereign identity
Start free up to 500 users. We’ll show you how to validate a DID in your backend.
Digital identity as a product, enterprise security as a service
© Block-Auth 2026
All rights reserved
Industries
Web 3.0
Ecommerce
Gaming
Gambling
Fintech
Insurance
Use cases
Location
Calle Velázquez, 27, 1º Dcha, 28001, Madrid
Recognition
Hiring funded by grants from the Comunidad de Madrid
