Overview

Inji Mobile isn't just a wallet – it’s a gateway to digital trust, empowering every individual to carry their identity with dignity, privacy, and control. — Inspired by the vision of open, inclusive digital identity ecosystems.

Inji Mobile is an open-source mobile wallet built to securely receive, store, manage, and share Verifiable Credentials (VCs), whether online or offline. Designed in line with global standards such as W3C VC Data Model, OpenID4VCI, OpenID4VP, ISO 18013-5 (mDL), and IETF SD-JWT, Inji Mobile enables individuals to carry digital identity, documents, certificates, etc., with full privacy, consent, and control.

Whether you're a citizen accessing government services, a developer building digital identity applications, or a verifier validating credentials, Inji Mobile offers a trusted, standards-compliant foundation for secure and privacy-preserving interactions. As a reference implementation, Inji Mobile is both a ready-to-use wallet and a modular solution; its SDKs, libraries, and components can be used independently or bundled into custom apps, depending on the adopter’s needs and specific use cases.

Core Design Principles

• Interoperability-First Complies with major standards: OpenID4VCI, OpenID4VP, W3C Data Model, IETF SD-JWT, JWT VC, and ISO mDL/mDoc.

• Offline Functionality BLE-based VC sharing and offline face authentication, ensuring usability even in no-connectivity environments.

• User Sovereignty Credentials are held entirely by the user, with granular consent-driven sharing.

• Modular Security Architecture Combines robust cryptography with flexible authentication mechanisms and strong privacy guarantees.

• Cross-Platform Native Implementation Built in React Native with Kotlin (Android) and Swift (iOS) integrations for native performance.

Capabilities Snapshot

Multiple Credential Format Support

Inji Wallet is designed for interoperability and flexibility by supporting a wide range of credential formats:

• W3C Verifiable Credentials (JSON-LD VCs) Data Model 1.1

  • Standards-based credential format is widely adopted across ecosystems.

  • Suitable for general-purpose credential issuance and verification.

• ISO 18013-5 (mDL)

  • Mobile Driving License and Mobile Document specification.

  • Supports use cases like identity verification in transport, law enforcement, and service access.

• IETF SD-JWT

  • IETF SD-JWT Verifiable Credentials: Enables holders to download and share credentials in IETF SD-JWT format. This allows users to share only the necessary attributes while keeping other data private, ensuring privacy-preserving credential sharing.

  • Allows users to share only the required claims with verifiers via the OpenIDVP flow, where these selectively disclosable claims can be shared as per the user's need. (Coming Soon in the upcoming release)

This multi-format support allows Inji Wallet to work seamlessly across different ecosystems, ensuring compatibility, security, and user privacy.

Secure Storage of VCs

• Digitally signed credentials from trusted issuers

• Encrypted and integrity-verified local storage.

• Supports multiple credential formats including W3C JSON-LD VCs, ISO mDL/mDoc, and IETF SD-JWT.

Seamless Credential Sharing

• Offline sharing via Bluetooth Low Energy (BLE)

• Online presentation using QR-code SSO and OpenID4VP

• Supports same-device and cross-device interactions

Authentication & Face Verification

• Offline face match verification to authenticate the user during VC sharing

• Device-level biometric/passcode unlock for app access

Deep Link-Based SSO (Wallet Login Authentication - WLA)

• Tap-to-login via QR code scanning

• Smart redirection to service post-verification

• Works across any OpenID4VP-compliant verifier

Credential Download via Pre-Auth Code

• Download credentials via pre-authorized flow

• Supports various credential types: national IDs, driver's licenses, health cards, academic degrees, etc.

How It Works

1. Credential Download Users can obtain VCs using their unique identifiers (UIN/VID or other methods), authenticate via OTP, and securely store them.

2. Credential Storage All credentials are stored encrypted, verified using the issuer’s digital signature, and integrity is validated via a unique HASH. In addition to standard VC formats, Inji Mobile supports JSON-LD, ISO mDL/mDoc and IETF SD-JWT credentials, ensuring the privacy-preserving selective disclosure of claims during verification.

3. Sharing Credentials Users can share credentials:

   • Offline using BLE

   • Online by scanning QR codes via OpenID4VP

   • Simple Upload and Scan of QR codes

4. Face Verification Optional offline face authentication ensures the right holder is presenting credentials during in-person verifications.

5. Consent & Privacy Credential sharing is consent-based, giving users full control over what data is shared and with whom.

Sneak Peek: Upcoming Features

• Support for W3C Data Model 2.0 and SVG Templates

• IETF SD-JWT-based Selective Disclosure via OpenID4VP

• Support for JWT-format credentials

• Presentation During Issuance

• Wallet Login with IdPs (OpenID4VP-based WLA)

• Credential Revocation Support

Technology and Integration

1. The app leverages Mimoto APIs

• Wallet configuration and trusted issuer setup

• VC download

• Holder binding of credentials (public key association)

1. Refer to Inji Certify APIs

• Fetch issuer's well-known metadata

• Download VCs (OpenID4VCI flow)

1. Additionally, it utilises eSignet APIs to enable seamless online login for users.

Summary

Inji Mobile is more than just a credential wallet; it’s a reference implementation for inclusive, offline-capable, standards-compliant digital identity. With full support for online and offline VC flows, strong cryptographic safeguards, and a user-first design, it provides a powerful tool for citizens, developers, and governments alike. Inji Mobile gives you the interoperable building blocks you need.

Get Involved

For any queries, contributions, or to collaborate, join us on the Inji community forum or raise a PR via the GitHub repository.