a comment on Mariano's comment: "I am not sure if Pharo could be the best language for security....the fact of being able to play as god goes in contrary to security also. I would let all this security stuff for the javascript guys. "
in fact, straightly opposite. think in terms that you want to develop/model/research a secure system on top of Pharo. And you're a God, of course, and you should be able to do that, and Pharo should help you investigating your problem space. Now, if pharo is underpowered, so you as well, and then you leave "security stuff for the javascript guys." :) -- Best regards, Igor Stasenko.