diff --git a/src/lib/stores/auth-user.ts b/src/lib/stores/auth-user.ts
index 300e37ade..be029ae6a 100644
--- a/src/lib/stores/auth-user.ts
+++ b/src/lib/stores/auth-user.ts
@@ -13,6 +13,7 @@ export const setAuthUser = (user: User, oidcFlow: OIDCFlow) => {
 
   switch (oidcFlow) {
     case OIDCFlow.AuthorizationCode:
+    default:
       if (!accessToken) {
         throw new Error('No access token');
       }
diff --git a/src/lib/utilities/is-authorized.test.ts b/src/lib/utilities/is-authorized.test.ts
index cb25b5507..9046457e1 100644
--- a/src/lib/utilities/is-authorized.test.ts
+++ b/src/lib/utilities/is-authorized.test.ts
@@ -2,20 +2,24 @@ import { describe, expect, it } from 'vitest';
 
 import { isAuthorized } from './is-authorized';
 
-const user = {
-  accessToken: 'xxx',
+const codeUser = {
+  accessToken: 'accessToken',
+};
+
+const implicitUser = {
+  idToken: 'idToken',
 };
 
 const noUser = {
   name: 'name',
   email: 'email',
   picture: 'picture',
-  idToken: 'idToken',
 };
 
-const getSettings = (enabled: boolean) => ({
+const getSettings = (enabled: boolean, flow: string) => ({
   auth: {
     enabled,
+    flow,
     options: [],
   },
   baseUrl: 'www.base.com',
@@ -29,16 +33,40 @@ const getSettings = (enabled: boolean) => ({
 });
 
 describe('isAuthorized', () => {
-  it('should return true if auth no enabled and no user', () => {
-    expect(isAuthorized(getSettings(false), noUser)).toBe(true);
+  it('should return true if auth not enabled and no user', () => {
+    expect(isAuthorized(getSettings(false, 'authorization-code'), noUser)).toBe(
+      true,
+    );
+  });
+  it('should return true if auth not enabled and user', () => {
+    expect(
+      isAuthorized(getSettings(false, 'authorization-code'), codeUser),
+    ).toBe(true);
+  });
+  it('should return false if code auth enabled and no user', () => {
+    expect(isAuthorized(getSettings(true, 'authorization-code'), noUser)).toBe(
+      false,
+    );
+  });
+  it('should return false if code auth enabled and implicit user', () => {
+    expect(
+      isAuthorized(getSettings(true, 'authorization-code'), implicitUser),
+    ).toBe(false);
+  });
+  it('should return true if code auth enabled and code user', () => {
+    expect(
+      isAuthorized(getSettings(true, 'authorization-code'), codeUser),
+    ).toBe(true);
   });
-  it('should return true if auth no enabled and user', () => {
-    expect(isAuthorized(getSettings(false), user)).toBe(true);
+  it('should return false if implicit auth enabled and no user', () => {
+    expect(isAuthorized(getSettings(true, 'implicit'), noUser)).toBe(false);
   });
-  it('should return false if auth enabled and no user', () => {
-    expect(isAuthorized(getSettings(true), noUser)).toBe(false);
+  it('should return false if implicit auth enabled and implicit user', () => {
+    expect(isAuthorized(getSettings(true, 'implicit'), codeUser)).toBe(false);
   });
-  it('should return true if auth enabled and user', () => {
-    expect(isAuthorized(getSettings(true), user)).toBe(true);
+  it('should return true if implicit auth enabled and implicit user', () => {
+    expect(isAuthorized(getSettings(true, 'implicit'), implicitUser)).toBe(
+      true,
+    );
   });
 });
diff --git a/src/lib/utilities/request-from-api.test.ts b/src/lib/utilities/request-from-api.test.ts
index 3f7c3fcf4..1bda98aed 100644
--- a/src/lib/utilities/request-from-api.test.ts
+++ b/src/lib/utilities/request-from-api.test.ts
@@ -110,7 +110,7 @@ describe('requestFromAPI', () => {
     });
   });
 
-  it('should not add csrf cookie to headers if not presdent', async () => {
+  it('should not add csrf cookie to headers if not present', async () => {
     const token = 'token';
 
     const request = fetchMock();
diff --git a/src/lib/utilities/route-for.test.ts b/src/lib/utilities/route-for.test.ts
index 939372f9e..5724a4450 100644
--- a/src/lib/utilities/route-for.test.ts
+++ b/src/lib/utilities/route-for.test.ts
@@ -172,6 +172,7 @@ describe('routeFor SSO authentication ', () => {
   it('Options added through settings should be passed in the url', () => {
     const settings = {
       auth: {
+        flow: 'authorization-code',
         options: ['one'],
       },
       baseUrl: 'https://localhost/',
@@ -192,6 +193,7 @@ describe('routeFor SSO authentication ', () => {
   it('should fallback to the originUrl if returnUrl is not provided', () => {
     const settings = {
       auth: {
+        flow: 'authorization-code',
         options: ['one'],
       },
       baseUrl: 'https://localhost/',
@@ -210,6 +212,7 @@ describe('routeFor SSO authentication ', () => {
   it('should use the returnUrl if provided', () => {
     const settings = {
       auth: {
+        flow: 'authorization-code',
         options: ['one'],
       },
       baseUrl: 'https://localhost/',
@@ -229,6 +232,7 @@ describe('routeFor SSO authentication ', () => {
   it("should not add the options from the search param if they don't exist in the current url params", () => {
     const settings = {
       auth: {
+        flow: 'authorization-code',
         options: ['one'],
       },
       baseUrl: 'https://localhost/',
@@ -245,7 +249,10 @@ describe('routeFor SSO authentication ', () => {
   });
 
   it('Should render a login url', () => {
-    const settings = { auth: {}, baseUrl: 'https://localhost' };
+    const settings = {
+      auth: { flow: 'authorization-code' },
+      baseUrl: 'https://localhost',
+    };
     const searchParams = new URLSearchParams();
 
     const sso = routeForAuthentication({ settings, searchParams });
@@ -254,7 +261,10 @@ describe('routeFor SSO authentication ', () => {
   });
 
   it('Should add return URL search param', () => {
-    const settings = { auth: {}, baseUrl: 'https://localhost' };
+    const settings = {
+      auth: { flow: 'authorization-code' },
+      baseUrl: 'https://localhost',
+    };
 
     const searchParams = new URLSearchParams();
     searchParams.set('returnUrl', 'https://localhost/some/path');
@@ -271,7 +281,10 @@ describe('routeFor SSO authentication ', () => {
   });
 
   it('Should not add return URL search param if undefined', () => {
-    const settings = { auth: {}, baseUrl: 'https://localhost' };
+    const settings = {
+      auth: { flow: 'authorization-code' },
+      baseUrl: 'https://localhost',
+    };
 
     const searchParams = new URLSearchParams();
     const sso = routeForAuthentication({ settings, searchParams });
@@ -283,6 +296,7 @@ describe('routeFor SSO authentication ', () => {
   it('test of the signin flow', () => {
     const settings = {
       auth: {
+        flow: 'authorization-code',
         options: ['organization_name', 'invitation'],
       },
       baseUrl: 'https://localhost/',
@@ -302,6 +316,56 @@ describe('routeFor SSO authentication ', () => {
     );
   });
 
+  describe('implicit oidc flow', () => {
+    it('should add a nonce', () => {
+      const settings = {
+        auth: {
+          flow: 'implicit',
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          scopes: ['openid', 'email', 'profile'],
+        },
+        baseUrl: 'https://localhost',
+      };
+
+      const searchParams = new URLSearchParams();
+
+      const sso = routeForAuthentication({
+        settings,
+        searchParams,
+      });
+
+      const ssoUrl = new URL(sso);
+      expect(window.localStorage.getItem('nonce')).toBe(
+        ssoUrl.searchParams.get('nonce'),
+      );
+    });
+
+    it('should manage state', () => {
+      const settings = {
+        auth: {
+          flow: 'implicit',
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          scopes: ['openid', 'email', 'profile'],
+        },
+        baseUrl: 'https://localhost',
+      };
+
+      const searchParams = new URLSearchParams();
+      searchParams.set('returnUrl', 'https://localhost/some/path');
+
+      const sso = routeForAuthentication({
+        settings,
+        searchParams,
+      });
+
+      const ssoUrlStateKey = new URL(sso).searchParams.get('state');
+      expect(ssoUrlStateKey).not.toBeNull();
+      expect(window.sessionStorage.getItem(ssoUrlStateKey as string)).toBe(
+        'https://localhost/some/path',
+      );
+    });
+  });
+
   describe('routeForLoginPage', () => {
     afterEach(() => {
       vi.clearAllMocks();
diff --git a/src/lib/utilities/route-for.ts b/src/lib/utilities/route-for.ts
index 8b92619d6..ab4d1f361 100644
--- a/src/lib/utilities/route-for.ts
+++ b/src/lib/utilities/route-for.ts
@@ -188,6 +188,7 @@ export const routeForAuthentication = (
   const { settings, searchParams: currentSearchParams, originUrl } = parameters;
   switch (settings.auth.flow) {
     case OIDCFlow.AuthorizationCode:
+    default:
       return routeForAuthorizationCodeFlow(
         settings,
         currentSearchParams,
@@ -298,6 +299,11 @@ export const routeForOIDCImplicitCallback = (): string => {
 
   // TODO: support optional issuer validation with settings.auth.issuerUrl and token.iss
 
+  if (!token.nonce) {
+    throw new OIDCImplicitCallbackError('No nonce in token');
+  } else if (token.nonce !== nonce) {
+    throw new OIDCImplicitCallbackError('Mismatched nonces');
+  }
   if (!token.nonce) {
     throw new OIDCImplicitCallbackError('No nonce in token');
   } else if (token.nonce !== nonce) {