Blockchain-Based Identity Infrastructure
Replace password-based authentication with cryptographic signatures. Users retain data ownership and reputation portability across the ecosystem.
The Problem
- Password-based security vulnerabilities
- Centralized access control and data silos
- Fragmented identity across platforms
- Lack of interoperable reputation data
The Solution
- Public-key cryptography authentication
- Decentralized identity management
- Cross-application identity persistence
- Portable reputation and credentials
Core Capabilities
Open standards and blockchain infrastructure for portability and sovereignty.
Passwordless Authentication
Cryptographic key pair authentication. Users authenticate by signing challenges with a private key, eliminating password transmission and storage.
Self-Sovereign Identity
User-controlled data ownership. Prevents central authority revocation, credential modification, or third-party data sales.
OAuth 2.0 Compatible
Standard OAuth 2.0 implementation. Integrates with existing authentication stacks without requiring backend architecture changes.
Cross-Platform Portability
Portable credentials. Users maintain identity, reputation, and social graph data across disparate applications and platforms.
Cryptographic Proof
Zero-knowledge proofs and selective disclosure. Verify claims and identity attributes without exposing raw underlying data.
Instant Verification
Real-time verification via blockchain anchors. Validates identity against the ledger without manual review or third-party confirmation.
How It Works
Key generation through cross-platform authentication.
Generate Keys
Key pair generation. Private keys remain device-local; public keys serve as the identity anchor.
Anchor to Blockchain
Blockchain registration. Public keys are recorded on the BSV blockchain as immutable timestamps.
Authenticate Anywhere
Signature-based authentication. Applications verify cryptographic signatures against the on-chain public key.
Accumulate Reputation
Portable reputation. User actions and attestations persist across the ecosystem.
Integration Options
SDKs and APIs for web, mobile, and enterprise environments.
Web Applications
JavaScript SDK. Browser integration for React, Vue, and standard web frameworks.
Mobile Apps
Native iOS and Android SDKs. Utilizes device secure enclaves for hardware-backed key storage.
Enterprise Systems
REST APIs and SAML bridges. Connects with existing enterprise identity providers.
Start Building with Sigma Identity
Implement user-owned identity for new applications or migrate existing authentication flows.