Prevent passwords (or any 'secret' data) to go into maven-build.properties

Hi,

I'm the main developper of jupload, an open-source project hosted on sourceforge. (FYI: an applet, which helps sending files to the server).

This applet needs to be signed, thus I need to store on the local configuration two properties: the file containing the keystore, and its password. In my case, these properties are stored in a specific profilen named 'jupload', in the settings.xml.

These properties must remain secret.

I currently want to use your (nice!) ant plugin, to allow non mavenized users to work on the applet.

But ...

... when using the ant:ant goal, all available properties are stored into the maven-build.properties file. So I must be careful, not to through my keystore password away.

So, my wish is: have a way to hide 'secret' properties.
I see several way to do this, without knowing what is feasible:
1) Prevent the ant:ant goal to capture properties. These properties could be managed like the build.xml file: have a maven-build.properties (with maven and project properties), and another properties file. This last file would be created once, like the build.properties, and would be overriden only with a specific configuration parameter, like the build.xml file.
2) Disallow the profile 'jupload', which contain the password. Would be the better, as it would also work if I create additionnaly properties there.
3) Allow to undefine properties. A message could be add into the maven-build.properties, to list the properties that must be defined locally, as an ant property for instance.
4) Have a way to filter properties, based on their name or by a regular expression (like jupload.* for instance)

Etienne