Implement signup functionality by posting to the backend to create a user. Create an Angular authentication service to handle signup, login, logout, and a user observable.

Design and implement a reactive authentication service in Angular, exposing is logged in and is logged out observables to control top menu buttons via the async pipe and ng container.

Implement client-side signup with the new Angular HttpClient, post email and password to /api/signup, validate form data, and cache results with shareReplay while broadcasting user data.

Explore how cryptographic hashes protect passwords by hashing with sha 256 using node's crypto module, and why digests replace plain text in password storage.

Hashing functions irreversibly store passwords as hashes with no key, producing a consistent output for given input and verifying by hashing the entered password and comparing to the stored hash.

Choose and implement Argon2 for password hashing in the sign-up backend, following OWASP guidance, and store a password digest with an internal salt while enforcing a password policy.

Implement a password policy using a facade with the password validator. Validate passwords in the create user route, return errors to the signup screen, and create the user on success.

Explore user session management, learn how a session ID replaces password on every http request, and implement a stateful login flow with in-memory sessions and secure session handling.

Convert callback-based node APIs to promise-based using util.promisify, creating a security.utils module and enabling async/await with crypto.randomBytes for maintainable, synchronous-feeling code.

Use node async/await to write synchronous-looking code, generate a 32-byte session id with crypto random bytes, create user and session, hash passwords with argon2, and store the session in memory.

Model a user session as a TypeScript class with session id, user, and a moment.js based valid until timestamp, plus an is session valid method.

Explore how browser cookies manage user sessions by creating an in memory session store, issuing a session ID cookie, and linking requests to users via cookies.

Explore how cookies store session IDs, why attackers can steal them via cross-site scripting, and how to defend by making cookies inaccessible to JavaScript to prevent impersonation.

Learn to protect session IDs by marking cookies as HttpOnly, preventing JavaScript access while still sending cookies automatically with each request.

Enable HttpOnly and secure cookie flags to protect session IDs from network attacks by running Angular CLI and API server over https with a self-signed certificate, and handle browser warnings.

Learn to load and broadcast authenticated user data from session at app startup, shield sensitive lessons data behind authentication, and eliminate user interface flicker by treating initial user as undefined.

Secure the lessons endpoint by returning an object instead of an array, prevent json hijacking, and validate the user session to display data only for authenticated users.

Implement logout by posting to /api/logout to destroy the server-side session and clear the http only cookie, then propagate anonymous user data to update the UI.

Implement the login flow: send http post to /api/login with email and password, verify password digest, create a user session, set cookies, and navigate to home.

Conclude login functionality with a complete stateful session flow, validating passwords via Argon2 verify, setting a session cookie, and issuing a session ID stored in memory.

Learn how JSON web tokens enable a fully stateless server and support delegation to externalized, third-party authentication services. Discover how they replace pre-authentication in enterprise environments and enable single sign-on.

Generate your first JSON web token with the JWT 256 script by signing a payload with a secret key, and see what a JWT looks like.

Explore JSON web tokens as an open standard for representing claims, with a three-part structure of header, payload, and signature, encoded in base64 for self-verification.

Discover the json web token format: header, payload, and signature; base64-encoded header and payload are not encrypted, and the signature enables authentication via a secret or 256 and RS 256.

Learn how hs256 signs json web tokens with a secret key using hmac, enabling payload verification and self validating tokens. Contrast with rsa 256 and key exchange implications.

Discover RS256 for JWTs and compare it to HS256, showing how public/private keys remove the need for a shared secret and enable secure token creation and verification.

Create a Json web token with a user subject and expiration, verify it with a public key, and implement RS-256 based user sessions in Angular security.

Explore stateless session management by signing Json web tokens with RSA keys, storing them in http only and secure cookies, and implementing a signed session token for user signup.

Identify the user by extracting the id from the Json web token, fetch the user from the in-memory database, and return profile data or 204 when not found.

Guard the data endpoint with an express middleware that checks a JWT and returns 403 for unauthenticated users. Apply route-specific checks so login routes remain open.

Demonstrate csrf vulnerabilities by simulating a post request from a forged page. Learn how session cookies and attacker controlled links enable this attack and how to defend against it.

Explore the limitations of CSRF by showing how attackers can submit post forms but cannot access responses or use JSON payloads.

Implement the double submit cookie csrf defense by generating an unguessable token, storing it in a cookie, and requiring a matching x-csrf-token header with each request.

Delegate authentication to a third party using json web tokens with auth0, removing cookies and csrf, and rewrite the angular app’s authentication service to rely on the external provider.

Create and configure an Auth0 account to enable authentication in an angular single-page application, including setting tenant, region, and obtaining client ID and domain for login and signup.

Set up an externally hosted login page using the of zero dash js library, configure a web of instance, and enable Google social login in the hosted modal.

Learn how to receive and parse the Auth0 Json web token at app startup using parseHash, extract id token and access token, and preserve them for authenticated requests without cookies.

Store the Auth0 id token in local storage via a set session method to persist across reloads, guard against null results, and enable interface updates based on authentication state.

Adapt the user interface by checking the local storage token expiration to show or hide login, sign up, and logout buttons based on whether the user is logged in.

Implement an Angular HttpInterceptor that sends the JSON web token from local storage with each request as a bearer authorization header, and register it as a multi provider.

Implement JWT-based authentication for an Express backend using Auth0, RS256, and the Json web key set, with key caching, rate limiting, and custom error handling.

Concludes frontend signup by calling a put /api/userinfo to save or fetch user preferences, emits them via a user observable, and fetches at startup when a valid token exists.

Implement rbac in an angular application by enforcing authorization after authentication, using json web tokens, admin impersonation, and an administrator only menu to protect lessons data.

Implement role-based access control with jwt by embedding user roles in the token payload; enable admin and student permissions, including admin impersonation and access to specific screens and backend services.

Provide a quick RBAC solution overview, outlining front-end impersonation with login as user, admin and student routes, and back-end security via express middleware to check authorization and CSRF protection.

Design a backend express authorization route for login as user. Implement check if authorized middleware with role-based access, including student and admin roles, using the underscore partial method.

Implement an express backend authorization route that reads user roles from the jwt payload and compares them to allowed roles using lodash intersection, returning 403 when unauthorized.

Implement the login as user backend service to return a json web token for the impersonated user and set a http-only session cookie, enabling frontend role-based authorization.

Enable UI level authorization by building a custom structural directive airbag allow to show admin elements only, hiding the admin menu from students via a roles array and authentication service.

Implement the rbacAllow structural directive to show elements when user roles intersect with allowed roles. Subscribe to the user observable, render views, and unsubscribe on destroy to prevent leaks.

Implement an authorization guard using canActivate to protect routes by evaluating user roles from the authentication service, returning an observable boolean and redirecting unauthorized users to the home route.

Learn how to separate security from application code using a centralized security server and Json web tokens, with RS 256 signatures, public key rotation, csrf defenses, and role-based access control.