Fundamentos
Next.js El futuro del Desarrollo Web
Novedades de Next.js 15
Migración de una APP a Next.js 15
Haciendo tu proyecto más rápido
RSC: Refactorizando un componente cliente a servidor
Cómo usar React Server Components con PostgreSQL sin un ORM
Consumiendo datos de manera eficiente
Consumiendo datos desde el servidor en Next.js 15
Consumiendo datos desde el cliente con React Query en Next.js 15
Patrones de Diseño: paralelo, secuencial y preload en Next.js 15
Uso avanzado de Suspense con Streaming rendering en Next.js 15
Escalabilidad y personalización
Internacionalización avanzada: rutas dinamicas y middlewares
Internacionalización avanzada: diccionario de traducciones
Autenticación: Middleware en Next.js para validar sesiones
Autenticación: Cookie sessions Next.js
Feature Flags LaunchDarkly en Next.js 15
Manejo de errores en React Server Components y Next.js
Manejo de errores y observavilidad: Integración con Sentry
Características Adicionales y Herramientas
Sistemas de caché en Next.js 15
Seguridad y buenas prácticas con Next.js
Seguridad y buenas prácticas: cookies, jwt y encriptación
Auditoria de performance en Next.js 15
Despliegue en Producción con Vercel
Despliegue en Fly.io: Preparación de Base de Datos
Despliegue en Fly.io: Despliegar Next.js en nuestro propio servidor
Next.js 15 el futuro del Desarrollo Web
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Next.js offers powerful functionalities to optimize the security of our applications, but it is essential that as developers we adopt additional practices to ensure a secure experience. In this context, the management of HTTP cookies, sessions and encryption becomes essential to avoid vulnerabilities that can compromise our information and that of our users.
How to handle HTTP cookies securely?
- HTTP Only: Setting the parameter to
trueprevents JavaScript from accessing cookies, protecting them from code injection attacks or malicious extensions. - Secure: Ensures that cookies are only transmitted under HTTPS connections, which prevents protocol downgrade attacks.
- SameSite: Setting it to
Strictrestricts the use of cookies exclusively to our domain, eliminating risks with third parties.
These settings must be implemented when creating the cookie to ensure its security.
What information should a cookie include?
- Avoid sensitive information such as emails, IDs or directly identifiable data.
- Use non-significant identifiers that are only useful within the system.
- Encrypt the data in the cookie so that only the server can interpret its contents.
This ensures that even if the cookie is stolen, its contents will not be useful to an attacker.
How to implement encryption for cookies?
Using JWT and the Jose library:
- Signature: Use a secret key to create a secure token.
- Verification: Validate the token upon receipt, ensuring that it has not been modified.
Key steps:
- Generate a unique secret and store it in environment variables.
- Create functions to encrypt and decrypt data, including hash algorithms such as H256.
- Encrypt sensitive information before storing it in the cookie.
- Validate cookies by decrypting them before using them on the system.
What risks does the use of encrypted cookies eliminate?
- Prevents stolen data from being decrypted by third parties.
- Prevents malicious modification of stored values.
- It reduces the exposure of sensitive data to potential vulnerabilities.
By following these recommendations, our applications will be more robust against possible attacks and will offer a more reliable experience to users.
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