Features

Inji Mobile is an open-source digital wallet designed to enable individuals to receive, store, and present Verifiable Credentials (VCs) securely, both online and offline. Purpose-built to align with global standards like W3C VC, OpenID4VCI, OpenID4VP, SD-JWT, and ISO 18013-5 (mDL), it brings interoperability, user autonomy, and strong cryptographic guarantees to digital identity ecosystems.

Download, Verify, and Store Verifiable Credentials

Inji Wallet makes it easy and secure for residents to manage their digital identity and credentials. From downloading and verifying to sharing and backing up Verifiable Credentials (VCs), this guide outlines all key features and workflows available in the wallet.

Downloading Verifiable Credentials

OpenID for VC Issuance

Residents can download VCs from trusted issuers integrated with OpenID for the VCI protocol.

Example Issuers:

• Republic of Veridonia National ID Department - National ID

• StayProtected Insurance - Insurance Credentials

• Republic of Veridonia Tax Department - Tax ID

• AgroVeritas Property & Land Registry - Land Record

• Veridonia Department of Motor Vehicles - mDoc

Pre-Authorised Credential Offers (Without Transaction Code)

• Users download credentials directly using a credential_offer URI

• No login required; pre-auth code embedded in the offer

• Used in mass issuance or public campaigns (e.g., vaccination certificates, offline cards)

Pre-Authorised Credential Offers (With Transaction Code)

• Adds a one-time transaction code (OTP / claim code) to bind issuance to the user

• User enters code in-app to retrieve VC securely

• Ideal for privacy-sensitive issuance (e.g., mDL, insurance)

Verifying Credential Authenticity

Inji Mobile Wallet uses robust cryptographic libraries to verify that the VC is:

• Digitally signed by a trusted issuer.

• Cryptographically valid based on proof type.

Signature Algorithm Support in Inji Mobile

Format	Signature Algorithm	Status	Notes
W3C JSON-LD	ED25519 2018	Supported	Compact, fast signatures with high security
mDoc/mDL	ED25519 2018	Supported	Used in mobile document ecosystems
W3C JSON-LD	ED25519 2020	Supported	Updated key format with enhanced key representation
mDoc/mDL	ED25519 2020	Supported	Widely used in mobile identity contexts
W3C JSON-LD	RS256 (RSA with SHA-256)	Supported	Backward compatibility; used in some legacy systems
mDoc/mDL	RS256 (RSA with SHA-256)	Supported	Applicable for RSA-backed mobile IDs
W3C JSON-LD	ECC K1	Supported	Common in OpenID ecosystem
mDoc/mDL	ECC K1	Supported	Used in various driver license implementations
JSON-LD	ECC R1	Planned	High-security EdDSA variant
mDoc/mDL	ECC R1	Planned	Emerging support for high-security mobile documents
SD-JWT	ECC R1	Planned	For selective disclosure with strong cryptographic guarantees
DIDComm v2 Messaging	Curve25519 / X25519	Research	Enables secure, encrypted VP exchange
JSON-LD ZKPs (VC-ZKP)	BBS+	Research	For advanced privacy-preserving credentials using Zero-Knowledge Proofs

Sharing Verifiable Credentials

Inji Wallet supports secure sharing of Verifiable Credentials (VCs) in multiple ways — both online and offline — with strong privacy and authentication.

Method	Description	Connectivity	User Control / Notes
QR Code Sharing	Generate QR using PixelPass. Scan or upload on verifier portal.	Online	Quick and compact
BLE (Bluetooth) Sharing	Share VCs offline using Bluetooth Low Energy.	Offline	Peer-to-peer; face match supported
SSO via QR Code	Scan QR on service portal → share selected VCs after user consent.	Online	Fine-grained VC selection and SSO login
OpenID4VP – Cross-Device	Scan verifier’s QR from another device → present VCs post face verification.	Online	Secure, decentralized VC presentation
OpenID4VP – Same Device	Tap QR on browser → deep-link opens wallet → share credentials.	Online	Seamless redirect

Note: All methods include user consent and privacy-by-design to ensure secure, context-aware interactions.

Backup and Restore

Inji Wallet includes a secure, one-time backup setup based on the platform:

Platform	Backup Option	Notes
Android	Google Drive	Select Google account
iOS	iCloud	Uses logged-in Apple account

Ideal for:

• Phone upgrades

• App crashes or resets

User-Friendly Interface & Quick Actions

Designed for ease of use with intuitive UI components:

• Multiple VC Views: Mini cards to full detail

• Separation of Downloaded vs. Received VCs

• Quick Access Menu: Share, Share with Selfie via the kebab menu (⋮) on card

• Select from a list of credential types offered by the issuer.

• Choose only the VCs they want to download, ensuring relevance and control.

• VCs grouped by type (ID, insurance, education)

• Recent VCs shown first

Wallet Security & Device Features

• Biometric / Passcode Access

  • App requires authentication on every open or session timeout

  • Supports Android biometrics and Apple Face ID / Touch ID

• Private Key Storage in Secure Enclave

  • Private keys are stored using Android Keystore / iOS Secure Enclave

  • Keys cannot be exported or tampered

Planned Features

• Revocation Status

• SD-JWT Selective Disclosure

• Injii Mobile Wallet Login

• Presentation during Issuance

Read More

• Inji Wallet User Guide

• Feature Workflows

• 🎬 Feature Demo Video