Spring Security taglib cannot be found

Adding this dependency fixed it for me (using 3.1.X.RELEASE) :

<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-taglibs</artifactId>
    <version>${your-version}</version>
</dependency>

The taglib now works properly:

<%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>