This is the thing I don't get at all about this debate, non backdoored open source encryption tools already exist and have for a while... you can't backdoor the

This is the thing I don't get at all about this debate, non backdoored open source encryption tools already exist and have for a while... you can't backdoor them because it'd be obvious from looking at the source that something fishy is going on. Are we just hoping that terrorists won't find out about these technologies?