Prior 3.5 we used a different OSGi framework launcher. It was a Virgo custom-tailored one, so it doesn't understand those two properties.
In 3.5 and later we switched to the standard Equinox OSGi launcher which is heavily used at Eclipse and it also brings support for these properties and the Equinox Security.
I'm not sure you can even enable the Equinox Security in 3.0.x or earlier. It could be possible but you'll probably need to do some stuff manually - I haven't tried it.