> For the complete documentation index, see [llms.txt](https://docs.openg2p.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openg2p.org/platform/platform-services/vc-issuance/phase-2-device-wallet.md).

# Phase 2 — Device Wallet

Phase 2 adds **self-owned smartphone wallets** for the growing segment of citizens who have a smartphone. It is the **self-sovereign** complement to Phase 1's paper credential — the citizen holds their own keys and credentials on their device.

> This is a forward-looking section. Phase 1 (paper) is the implementation focus; Phase 2 is added as smartphone adoption in the target population grows.

## What it adds over paper

* **Holder-bound presentation** — bound to a key on the device, so a credential can't simply be photocopied and reused (unlike bearer paper).
* **Online / remote presentation (OpenID4VP)** — present digitally to a remote relying party, not only face-to-face.
* **Offline presentation** — QR/BLE in the field, no connectivity needed.
* **Selective disclosure** — reveal only the claims a verifier needs.
* **Self-service** — fetch, hold, and re-present without a kiosk trip.

## Component

* **Inji Mobile** — MOSIP's OpenID4VCI device wallet (Android/iOS). Any OpenID4VCI-compliant wallet also interoperates, since Certify is standards-based.

## Same issuer, registry data pulled (not pushed)

Phase 2 reuses the **same Inji Certify issuer** — only the **holder/delivery** changes (a device wallet instead of paper). The data path, however, flips: instead of the Phase-1 **push** (where the Agent Portal API reads the Registry and pushes claims), the wallet does an interactive **OpenID4VCI** download, so **Certify pulls** the citizen's claims itself via the custom **Registry connector** (`RegistryDataProviderPlugin`), keyed by the citizen's authenticated token claim. See [Registry Data Connector](/platform/platform-services/vc-issuance/registry-data-connector.md).

That wallet flow needs an OAuth2/OIDC **authorization server** and introduces the integration considerations (token type, `c_nonce`, the AS choice) that Phase 1 deliberately avoids. Those are taken up when Phase 2 is scheduled.

## Not in scope (separate tracks)

* **Hosted/custodial wallet (Option B, Inji Web + Mimoto)** — considered but **not chosen**; see [Custody Options & Strategy](/platform/platform-services/vc-issuance/custody-options-and-strategy.md). Adopt only as a deliberate custodial-locker policy.
* **Consent-based data sharing** (department ↔ department / third-party pull) — a registry partner-API + consent concern, not a wallet feature.


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