"Mmm, well... Most of the time I hack into enemy defence systems," enemies that weren't always machines, "or take them over. The more advanced machines have stronger defences against hacking, but if I take over the simpler ones I can use their system ID to gain entry to other machines."

There's a lot more he could theoretically do, but... Rita doesn't need to know he can mess with memories, too. Not that he would. Not unless asked to, anyway.