diff --git a/index.html b/index.html
index 0aa80a7..fd617e3 100644
--- a/index.html
+++ b/index.html
@@ -766,6 +766,7 @@
         </p>
     </footer>
 
+    <script src="js/encryptid.browser.js"></script>
     <script src="js/encryptid.js"></script>
     <script>
         // ─── EncryptID Auth ────────────────────────────────────────
diff --git a/js/encryptid.js b/js/encryptid.js
index a8abd8d..0373742 100644
--- a/js/encryptid.js
+++ b/js/encryptid.js
@@ -1,260 +1,37 @@
 /**
  * EncryptID Authentication for rWallet.online
  *
- * Adds optional passkey-based identity to the static wallet explorer.
- * When authenticated, the user gets a persistent identity and can
- * associate wallet addresses with their account.
+ * Thin wrapper around @encryptid/sdk browser bundle.
+ * The SDK provides the full WebAuthn ceremony — this file
+ * just migrates the old localStorage key and re-exports the API.
+ *
+ * To update the SDK bundle:
+ *   cd ../encryptid-sdk && bun run build:browser
+ *   cp dist/encryptid.browser.js ../rwallet-online/js/encryptid.browser.js
  */
 
-const EncryptID = (() => {
-    const SERVER = 'https://encryptid.jeffemmett.com';
-    const STORAGE_KEY = 'rwallet_encryptid';
+// Migrate old localStorage key to SDK format
+(function migrateStorage() {
+    const OLD_KEY = 'rwallet_encryptid';
+    const NEW_TOKEN_KEY = 'encryptid_token';
+    const NEW_USER_KEY = 'encryptid_user';
 
-    // ─── Helpers ─────────────────────────────────────────────────
-    function toBase64url(buffer) {
-        return btoa(String.fromCharCode(...new Uint8Array(buffer)))
-            .replace(/\+/g, '-')
-            .replace(/\//g, '_')
-            .replace(/=+$/g, '');
-    }
-
-    function fromBase64url(str) {
-        return Uint8Array.from(
-            atob(str.replace(/-/g, '+').replace(/_/g, '/')),
-            c => c.charCodeAt(0)
-        );
-    }
-
-    function getStoredAuth() {
+    const old = localStorage.getItem(OLD_KEY);
+    if (old && !localStorage.getItem(NEW_TOKEN_KEY)) {
         try {
-            const raw = localStorage.getItem(STORAGE_KEY);
-            return raw ? JSON.parse(raw) : null;
-        } catch { return null; }
-    }
-
-    function setStoredAuth(auth) {
-        localStorage.setItem(STORAGE_KEY, JSON.stringify(auth));
-    }
-
-    function clearStoredAuth() {
-        localStorage.removeItem(STORAGE_KEY);
-    }
-
-    // ─── Authentication ──────────────────────────────────────────
-
-    async function authenticate() {
-        // Step 1: Get challenge
-        const startRes = await fetch(`${SERVER}/api/auth/start`, {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({}),
-        });
-        const { options } = await startRes.json();
-
-        // Step 2: WebAuthn ceremony
-        const assertion = await navigator.credentials.get({
-            publicKey: {
-                challenge: fromBase64url(options.challenge),
-                rpId: options.rpId,
-                userVerification: options.userVerification,
-                timeout: options.timeout,
-                allowCredentials: options.allowCredentials?.map(c => ({
-                    type: c.type,
-                    id: fromBase64url(c.id),
-                    transports: c.transports,
-                })),
-            },
-        });
-
-        const response = assertion.response;
-
-        // Step 3: Complete
-        const completeRes = await fetch(`${SERVER}/api/auth/complete`, {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({
-                challenge: options.challenge,
-                credential: {
-                    credentialId: assertion.id,
-                    authenticatorData: toBase64url(response.authenticatorData),
-                    clientDataJSON: toBase64url(response.clientDataJSON),
-                    signature: toBase64url(response.signature),
-                    userHandle: response.userHandle ? toBase64url(response.userHandle) : null,
-                },
-            }),
-        });
-
-        const result = await completeRes.json();
-        if (!result.success) throw new Error(result.error || 'Authentication failed');
-
-        const auth = { token: result.token, did: result.did, username: result.username };
-        setStoredAuth(auth);
-        return auth;
-    }
-
-    async function register(username) {
-        // Step 1: Get registration options
-        const startRes = await fetch(`${SERVER}/api/register/start`, {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({ username, displayName: username }),
-        });
-        const { options, userId } = await startRes.json();
-
-        // Step 2: WebAuthn ceremony
-        const credential = await navigator.credentials.create({
-            publicKey: {
-                challenge: fromBase64url(options.challenge),
-                rp: options.rp,
-                user: {
-                    id: fromBase64url(options.user.id),
-                    name: options.user.name,
-                    displayName: options.user.displayName,
-                },
-                pubKeyCredParams: options.pubKeyCredParams,
-                authenticatorSelection: options.authenticatorSelection,
-                timeout: options.timeout,
-                attestation: options.attestation,
-            },
-        });
-
-        const response = credential.response;
-
-        // Step 3: Complete
-        const completeRes = await fetch(`${SERVER}/api/register/complete`, {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({
-                challenge: options.challenge,
-                userId,
-                username,
-                credential: {
-                    credentialId: credential.id,
-                    publicKey: toBase64url(response.getPublicKey?.() || response.attestationObject),
-                    attestationObject: toBase64url(response.attestationObject),
-                    clientDataJSON: toBase64url(response.clientDataJSON),
-                    transports: response.getTransports?.() || [],
-                },
-            }),
-        });
-
-        const result = await completeRes.json();
-        if (!result.success) throw new Error(result.error || 'Registration failed');
-
-        const auth = { token: result.token, did: result.did, username };
-        setStoredAuth(auth);
-        return auth;
-    }
-
-    function logout() {
-        clearStoredAuth();
-    }
-
-    function isAuthenticated() {
-        return !!getStoredAuth();
-    }
-
-    function getUser() {
-        return getStoredAuth();
-    }
-
-    // ─── UI Component ────────────────────────────────────────────
-
-    /**
-     * Render a passkey auth button into the specified container.
-     * Shows sign-in when anonymous, username + sign-out when authenticated.
-     */
-    function renderAuthButton(containerId) {
-        const container = document.getElementById(containerId);
-        if (!container) return;
-
-        function render() {
-            const auth = getStoredAuth();
-
-            if (auth) {
-                container.innerHTML = `
-                    <div style="display:flex;align-items:center;gap:10px;justify-content:center;">
-                        <span style="color:var(--text-dim);font-size:0.85rem;">
-                            Signed in as <strong style="color:var(--primary);">${auth.username || auth.did?.slice(0, 16) + '...'}</strong>
-                        </span>
-                        <button id="eid-signout" style="background:none;border:1px solid var(--border);color:var(--text-dim);padding:4px 12px;border-radius:6px;cursor:pointer;font-size:0.8rem;">
-                            Sign out
-                        </button>
-                    </div>
-                `;
-                document.getElementById('eid-signout').addEventListener('click', () => {
-                    logout();
-                    render();
-                });
-            } else {
-                container.innerHTML = `
-                    <div style="display:flex;align-items:center;gap:8px;justify-content:center;">
-                        <button id="eid-signin" style="background:none;border:1px solid var(--border);color:var(--text-dim);padding:6px 16px;border-radius:8px;cursor:pointer;font-size:0.85rem;display:flex;align-items:center;gap:6px;transition:all 0.2s;">
-                            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-                                <circle cx="12" cy="10" r="3"/><path d="M12 13v8"/><path d="M9 18h6"/><circle cx="12" cy="10" r="7"/>
-                            </svg>
-                            Sign in with Passkey
-                        </button>
-                    </div>
-                `;
-                const btn = document.getElementById('eid-signin');
-                btn.addEventListener('mouseenter', () => { btn.style.borderColor = 'var(--primary)'; btn.style.color = 'var(--primary)'; });
-                btn.addEventListener('mouseleave', () => { btn.style.borderColor = 'var(--border)'; btn.style.color = 'var(--text-dim)'; });
-                btn.addEventListener('click', async () => {
-                    btn.textContent = 'Authenticating...';
-                    btn.disabled = true;
-                    try {
-                        await authenticate();
-                        render();
-                    } catch (e) {
-                        if (e.name === 'NotAllowedError') {
-                            // No passkey found — prompt to register
-                            const name = prompt('No passkey found. Create one?\nEnter a username:');
-                            if (name) {
-                                try {
-                                    await register(name.trim());
-                                    render();
-                                } catch (re) {
-                                    alert('Registration failed: ' + re.message);
-                                    render();
-                                }
-                            } else {
-                                render();
-                            }
-                        } else {
-                            alert('Sign in failed: ' + e.message);
-                            render();
-                        }
-                    }
-                });
+            const data = JSON.parse(old);
+            if (data.token) localStorage.setItem(NEW_TOKEN_KEY, data.token);
+            if (data.did || data.username) {
+                localStorage.setItem(NEW_USER_KEY, JSON.stringify({
+                    did: data.did,
+                    username: data.username,
+                    token: data.token,
+                }));
             }
-        }
-
-        render();
+            localStorage.removeItem(OLD_KEY);
+        } catch { /* ignore parse errors */ }
     }
-
-    // ─── Auth Gate ──────────────────────────────────────────────
-
-    /**
-     * Require authentication before accessing a page.
-     * If not authenticated, redirects to index.html with a return URL.
-     * Call at the top of visualization pages.
-     */
-    function requireAuth() {
-        if (isAuthenticated()) return true;
-        const returnUrl = encodeURIComponent(window.location.href);
-        window.location.replace(`/index.html?login=required&return=${returnUrl}`);
-        return false;
-    }
-
-    // ─── Public API ──────────────────────────────────────────────
-    return {
-        authenticate,
-        register,
-        logout,
-        isAuthenticated,
-        getUser,
-        renderAuthButton,
-        requireAuth,
-    };
 })();
+
+// The actual EncryptID global is set by encryptid.browser.js (loaded before this file)
+// This file only handles the storage migration above.