I've created a KeyczarReader implementation that can use a keystore from any 
location accessible to 
the current classloader, including Jar files.  This is useful if you want to 
track your keystore in 
version control and package and distribute it with your application code.

As an example, you can simply create a new keystore using the KeyczarTool in 
'src/main/resources/keystore', check it into source control, and have it 
automatically packaged with 
your application code during the build.  This reader will be able to load keys 
from the store using 
the location ("keystore" in this example) from within the Jar file.