<profile>

<id>sign-release-artifacts</id>

<activation>

<property>

<name>performRelease</name>

<value>true</value>

</property>

</activation>

<build>

<plugins>

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-gpg-plugin</artifactId>

<version>1.6</version>

<executions>

<execution>

<id>sign-artifacts</id>

<phase>verify</phase>

<goals>

<goal>sign</goal>

</goals>

<configuration>

<keyname>${gpg.keyname}</keyname>

<passphraseServerId>${gpg.keyname}</passphraseServerId>

</configuration>

</execution>

</executions>

</plugin>

</plugins>

</build>

</profile>