Spring Security URL and Method Authorization

Controlling access to APIs based on the requested URL and HTTP method is a common requirement in modern web applications.…

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Spring Security – Integrate Passkeys Example

With the increasing demand for passwordless authentication, passkeys have emerged as a modern, secure alternative. Let us delve into understanding…

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Spring Security + OAuth2 Resource Server: How to Validate JWTs Like a Pro

OAuth2 and JWT (JSON Web Tokens) have become the standard for securing APIs in modern microservices and web applications. When…

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Best Practices for Storing and Validating Passwords in Java (BCrypt, Argon2, PBKDF2)

Password security is critical for any modern application. Java developers often face the question:Which algorithm should I use? In this…

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Fine-Grained Authorization with Spring Security and @PreAuthorize Annotations

Spring Security provides powerful tools to secure your Java applications—but one of its most underrated features is method-level authorization using…

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Securing GraphQL with Spring Security: A Practical Guide

GraphQL provides a flexible and efficient way to query APIs, but with that power comes the need for robust security.…

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Implementing Multi-Tenant Security with Spring Boot and Spring Security

Multi-tenancy is a software architecture where a single application instance serves multiple tenants (clients), each with its own data and…

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How to Secure REST APIs with Spring Security and JWT (2025 Edition)

In 2025, stateless authentication remains the go-to approach for securing REST APIs. Spring Security combined with JWT (JSON Web Tokens)…

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HATEOAS + Spring Security: Why Some Links Are Missing for Certain Roles

ATEOAS (Hypermedia As The Engine Of Application State) is a core constraint of REST application architecture that makes REST APIs…

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