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This guide explains Spring Security 6.4’s one-time token login feature, covering its concept, authentication flow, core components, and step‑by‑step implementation with code samples, enabling developers to add secure magic‑link authentication to Spring Boot applications.
Spring Security 6.4 introduces One-Time Token Login, allowing users to authenticate via a magic link sent by email instead of passwords; the article explains its core concepts, token lifecycle, essential components, and provides step‑by‑step code examples for configuring and implementing this secure, user‑friendly authentication method.
This article explains how to implement One-Time Token (OTT) authentication in Spring Boot 3.4 using Spring Security, covering environment setup, required dependencies, security configuration, token generation handlers, custom storage options, custom login pages, and testing procedures with complete code examples.