Description

This curriculum spans the design, implementation, and governance of authentication systems across diverse application environments, comparable in scope to a multi-phase security architecture engagement supporting regulated product development.

Module 1: Foundational Authentication Concepts and Threat Modeling

Selecting appropriate authentication factors based on application sensitivity and regulatory requirements, such as opting for multi-factor authentication in financial systems.
Mapping authentication flows to the NIST 800-63-3 identity assurance levels when designing systems for government or healthcare clients.
Conducting threat modeling exercises to identify weak points in authentication, such as credential stuffing or session fixation.
Documenting authentication decision rationale for auditors, including justification for not implementing step-up authentication in low-risk workflows.
Defining session lifetime policies based on user behavior analytics and risk profiles, balancing security and usability.
Evaluating the risks of storing authentication logs containing partial credential data versus operational debugging needs.

Module 2: Password-Based Authentication and Credential Management

Implementing secure password hashing using Argon2 or PBKDF2 with unique salts, and migrating legacy SHA-1 hashes in phased rollouts.
Configuring password complexity rules that align with NIST guidelines, avoiding arbitrary complexity while enforcing minimum length and breach detection.
Integrating real-time password breach checks using APIs like HaveIBeenPwned during registration and password changes.
Designing secure password reset workflows that prevent enumeration attacks through uniform error messaging.
Enforcing rate limiting on login attempts using sliding window counters, while avoiding denial-of-service for legitimate users.
Managing credential storage in development and staging environments using synthetic test data instead of production copies.

Module 3: Multi-Factor and Adaptive Authentication

Choosing MFA methods (TOTP, WebAuthn, SMS, push) based on user demographics, device ownership, and phishing resistance requirements.
Implementing step-up authentication for high-risk operations such as changing email addresses or initiating fund transfers.
Configuring risk-based adaptive authentication engines using signals like IP geolocation, device fingerprinting, and behavioral biometrics.
Handling fallback mechanisms during MFA failures, such as lost devices, without compromising security or user experience.
Integrating FIDO2/WebAuthn with platform authenticators and security keys while ensuring cross-browser compatibility.
Managing user enrollment and recovery for hardware tokens, including provisioning workflows and backup code generation.

Module 4: OAuth 2.0, OpenID Connect, and Federated Identity

Selecting OAuth 2.0 grant types (authorization code, client credentials, device code) based on client type and security posture.
Securing OpenID Connect implementations by validating ID tokens, enforcing PKCE, and verifying issuer and audience claims.
Configuring identity provider (IdP) integrations with SAML or OIDC, including certificate rotation and metadata refresh schedules.
Managing consent screens and scope disclosures in third-party application access, particularly in B2B SaaS environments.
Implementing token revocation and introspection endpoints to support real-time access control decisions.
Handling IdP-initiated logouts and ensuring proper session termination across service providers in federated setups.

Module 5: Session Management and Token Security

Generating cryptographically secure session identifiers and storing them server-side with appropriate expiration and rotation policies.
Setting secure cookie attributes (HttpOnly, Secure, SameSite) to mitigate XSS and CSRF attacks in web applications.
Implementing short-lived JWT access tokens with refresh token rotation to reduce exposure windows.
Designing stateless session validation mechanisms without sacrificing revocation capability using token deny lists or distributed caches.
Encrypting sensitive claims within JWTs when transmitting personally identifiable information across services.
Monitoring for session fixation by regenerating session IDs after successful authentication and privilege changes.

Module 6: API Authentication and Machine-to-Machine Security

Selecting between API keys, OAuth2 client credentials, and mTLS for service-to-service authentication based on trust boundaries.
Rotating API keys through automated workflows with deprecation timelines and versioned key support.
Implementing mutual TLS for internal microservices, including certificate issuance via internal PKI and short-lived certificates.
Enforcing rate limiting and quota management at the API gateway based on client identity and usage tiers.
Securing service accounts with least-privilege roles and audit logging for privileged automation tasks.
Validating audience and issuer claims in JWTs used for inter-service communication to prevent token replay across environments.

Module 7: Biometric and Passwordless Authentication

Evaluating platform biometric APIs (Touch ID, Windows Hello, Android BiometricPrompt) for reliability and fallback handling.
Implementing passkey registration and authentication flows using WebAuthn, including cross-device sync via platform sync.
Storing public key credentials securely in backend directories with appropriate indexing for fast lookup during authentication.
Managing user recovery for lost passkeys through backup methods like recovery codes or trusted devices.
Designing fallback authentication paths when biometric sensors are unavailable or fail repeatedly.
Assessing legal and privacy implications of biometric data processing under GDPR, CCPA, and BIPA in different jurisdictions.

Module 8: Authentication Governance, Monitoring, and Incident Response

Establishing audit logging standards for authentication events, including success, failure, and MFA enrollment changes.
Integrating authentication logs with SIEM systems using normalized schemas for anomaly detection and correlation.
Creating automated alerting rules for suspicious patterns such as rapid geographic logins or bulk account enumeration.
Conducting periodic access reviews to deprovision stale accounts and orphaned service identities.
Developing incident playbooks for credential leaks, account takeovers, and authentication system outages.
Performing red team exercises focused on bypassing or weakening authentication controls to validate defenses.

Authentication Methods in Application Development