Posts tagged

Authentication

The Ultimate API Security Checklist: Because Sleep is Overrated

A no-nonsense, lightly irreverent rundown of five core API security areas every developer should have locked down: authentication upgrades beyond basic auth (OAuth 2.0, JWT, MFA), mandatory HTTPS with HSTS, rigorous input validation to prevent SQL injection and XSS, rate limiting with proper 429 responses, and centralized logging with real-time alerting. Written in a conversational tone that makes security hygiene approachable without sacrificing the practical substance.

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API Security Checklist: Essential Strategies for API Protection

A comprehensive 14-area checklist covering every major dimension of API security: authentication and authorization (OAuth 2.0, JWT, RBAC, MFA), HTTPS and TLS configuration, input validation and sanitization, rate limiting, API key and secrets management, logging and monitoring, Content Security Policy, versioning and deprecation, dependency management, error handling without information leakage, CORS policies, documentation standards, automated security testing in CI/CD pipelines, and incident response planning.

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API Security Best Practices: Protecting Sensitive Data and Preventing Attacks

Provides a layered security guide for Flask APIs covering seven concrete defenses: HTTPS enforcement via redirect middleware, JWT-based authentication with expiry handling, input validation with length and format checks, parameterized SQL queries to block injection, XSS prevention through html.escape, rate limiting with Flask-Limiter, and secure password storage using Werkzeug's hashing utilities. Each technique is shown with working code rather than theory alone, making it straightforward to apply to a real API.

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Working with APIs Using JWT (JSON Web Tokens)

Explains the structure of a JSON Web Token (header, payload, and signature) and how the login-then-bearer-token flow works between a client and a protected API. Shows how to create tokens with PyJWT including an expiration claim, verify and decode them with proper error handling for expired and invalid tokens, and attach them to API requests via the Authorization header. Covers refresh tokens for silent session renewal and closes with four security best practices: HTTPS, short-lived tokens, HTTP-only cookie storage, and token blacklisting.

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OAuth and API Authentication: Accessing Secure APIs

Explains the three main API authentication patterns, API keys (query param and header variants), HTTP Basic Auth, and OAuth 2.0, with Python code for each. Walks through the full OAuth 2.0 authorization code flow using GitHub as the example: redirect the user to an authorization URL, receive the auth code, exchange it for an access token, and call the protected API. Also covers OAuth 1.0a versus 2.0 differences and shows how to use a refresh token to silently renew expired access tokens without re-prompting the user.

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