Tag: authentication

How to implement request/response middleware for logging, auth, and error handling across Python, JavaScript, and Java.

How to authenticate WebSocket connections, implement token validation, and handle authorization for real-time messaging in production

How to build an API gateway that routes requests, handles authentication, rate limiting, caching, and protocol translation between clients and backend microservices.

How to generate, distribute, validate, and rotate API keys for machine-to-machine authentication using HMAC signatures, scopes, and rate-limited key policies.

How to hash and verify passwords securely with Argon2id, the winner of the Password Hashing Competition, with correct parameter tuning and migration strategies from bcrypt.

How to implement attribute-based access control with policy engines, live context evaluation, and fine-grained authorization decisions across Python, Node.js, and Java.

How to implement role-based access control with hierarchical roles, permission grants, and middleware enforcement across Python, Node.js, and Java.

How to implement SAML 2.0 single sign-on as a Service Provider with XML signature verification, IdP metadata handling, and secure session management in Python, Node.js, and Java.

How to generate, validate, and refresh JSON Web Tokens for stateless API authentication.

How to build secure passwordless authentication using time-limited magic links sent via email, with token generation, validation, and replay attack prevention.

Implement JWT authentication in Node.js with access and refresh tokens

Implement GitHub OAuth2 login flow in Node.js with Express and Passport

How to implement OAuth 2.0 authentication with Google, GitHub, and other providers.

How to securely hash and verify passwords using modern algorithms across Python, JavaScript, and Java.

How to create, validate, and expire user sessions securely across web applications using cookies, tokens, and server-side storage.

How to implement time-based one-time password (TOTP) two-factor authentication for secure user login.

Implement field-level authorization in GraphQL using custom schema directives that check user roles and permissions per field

Generate, rotate, and distribute SSH keys with bash scripts

How to prevent Cross-Site Request Forgery attacks using synchronizer tokens, SameSite cookies, and double-submit cookie patterns.

Secure API requests with HMAC-SHA256 signatures to ensure integrity and authenticity.

How to implement the OAuth 2.0 PKCE flow in single-page applications to securely authenticate users without exposing client secrets

Securely hash and verify passwords using bcrypt, scrypt, and Argon2 with what works.

Implement secure JWT access and refresh token rotation in Python with blacklist, reuse detection, and automatic access token renewal for stateless auth

Implement custom Lambda authorizers for API Gateway with JWT validation, IAM policy generation, and caching for token-based authentication in serverless APIs.

Delegate authentication to external identity providers. A pattern for integrating OAuth2, OIDC, SAML, and SSO across multiple services and organizations.

A template for defining authentication, authorization, RBAC, ABAC, MFA, password policies, session management, and access review procedures.

Template for documenting API authentication flows and token lifecycle: auth scheme selection, token types, issuance, validation, refresh, revocation, MFA, OAuth2 flows, JWT configuration, and security best practices with code examples.

A checklist template for reviewing API authentication, rate limiting, and OWASP compliance.

Secure GraphQL APIs against introspection leaks, query depth attacks, cost-based DoS, batching abuse, and injection. Covers auth patterns, rate limiting, and production hardening.

Master API gateway architecture: request routing, authentication, rate limiting, request shaping, response caching, protocol translation, and production deployment patterns.

A thorough security checklist for APIs: authentication, authorization, input validation, rate limiting, encryption, logging, and deployment hardening.

Implement authentication in production. Covers JWT, OAuth2, session-based auth, passkeys, MFA, refresh tokens, token rotation, RBAC, ABAC, SSO with SAML and OpenID Connect, and secure logout patterns with practical code examples.

Master OAuth2 and OpenID Connect for production: authorization code flow with PKCE, token validation, refresh tokens, scopes, JWT verification, and security best practices.

A practical guide to secure coding practices across languages: input validation, memory safety, authentication, and defensive patterns for Python, Java, JavaScript, and Go.

A thorough guide to application security: authentication, authorization, input validation, secrets management, and common vulnerability prevention.