apple has said only 50%, this is quite surprising. 50% of iphone users bother to have pass codes at all. this sort of thumbprint sensor was supposed to be an easier way to answer your phone compared to typing in a pass code. >> there wouldn't be many fingerprints on iphones, would there? [ laughter ] >> it's all about the fingerprints. >> you leave it everywhere. >> it's kind of a game for haerks. they come out with something and then the hackers are on to it to try to find the bug. i don't know. it might ultimately help. >> two days, by the way, after apple released the new phone. they were already on to it. >> frustratingly brilliant. >> it might help. they can find out what they need -- >> perfect it. >> they're going to keep each other in business, in other words. >> all right. who would have thought a fingerprint on your iphone. >> crazy. >> crazy. good to see you, zain.