hey it's norm from set and I'm here with Frank Ippolito we're here an atom's shop
for another video interesting video this time it's an experiment
honest to goodness experiment we have no idea how this is going to end but today
we're going to talk about technology are you comfortable okay special effects and
Technology last year Apple released the iPhone 5s which was their first product
using touch ID you've probably heard of such idea it's a biometric sensor system
for your phone to double as your password now this year there are more
products using touch ID and more services using them it's being used for
things like Apple pay passwords one password and we wanted to see how
basically how foolproof it was we're not going to have touch ID people have said
they've made all claims by hacking it last year a hacking group over Germany
the Chaos Computer Club released the video showing how they spoofed touch ID
and what they did was they duplicated someone's fingerprint and put it on
acetate and created a relief image it was a pretty involved process but we
wanted to try to make it more involved even more involved but basically try to
understand how touch ID works do you know how this works once you explain so
beneath this home button on the iPhone and the ah two iPads is basically a
sensor it's like an optical sensor almost like a camera there's a
capacitance sensor that's what makes the touchscreen works and knows it registers
that your finger is there but basically it takes a high-resolution image what
people have said is it's about five hundred dpi which is fairly high Apple's
talks about subdermal imaging but basically it knows all the grooves and
all the curves of your fingerprint and registers that because you do have to
register it multiple times stores it locally and so when you put your finger
on there basically recognizes that that is your fingerprint so we want to see if
we could activate unlock a phone activate touch ID without having the
actual hand there a warm body head maybe a this
Burhan there you go so this is actually a hand cast we did a couple months ago
of my hand it's just a silicon hand cast and based on your experience and the
special effects industry Frank how accurate is the fingerprints on
something like a hand cast well I mean the silicone doesn't shrink or expand or
anything so it's pretty accurate as long as we got it in all the detail this was
done in an alginate mold so the detail might be a little soft but what we'll do
today is we'll do a little silicone casting your finger my finger and we'll
see if we can crack it with that so we're talking about mold materials and
casting materials and when using silicone as a mold material you're going
to and doing it right you're going to get a more accurate castle hopefully be
almost exactly 1 to 1 all you know microns of accuracy or so hopefully and
then the casting material also important yeah hasn't resins and silicones and all
sorts of well the pad of your finger tip is about a 35 a durometer but that's the
German cedar that's that's how stiff it is how rigid yeah the durometer scale is
how you measure how softer a rigid something is there's an a scale for soft
things in a d scale for rigid things and your your thumb tip is about a 35 eh
okay but the problem is is that when we push on the button it doesn't have
enough give to kind of like flatten out things so I think we want to go a little
bit softer so we're doing this off-camera this casting is done in a
twenty drama of silicone which technically is softer they're the 35 of
your finger think we want to go softer than that I haven't saw I have a tender
ombre that's right you want to be able to flatten without pushing the button
yeah now the other piece of the puzzle is capacitance I'm gonna need to be able
to activate that touch sensor in the first place how we're gonna give
silicone capacitance because if you put a silicone finger or you know hot dog on
here it's not going to activate the touchscreen maybe a hot dog hot dog
Wesson yes but a silicone hot dog we could have hot dog fingers do that I
think from what everybody's told me adding graphite is enough to give it
capacitance whether that's mixing the graphite into the silicone or just
powdering the surface of the mold and then putting the silicone behind it so
that the silicone grabs the surface of the graphite we'll try we'll try it like
I said this is an honest-to-goodness experiment and there's a good likelihood
that will fit but follow along with the process let's go to step one which is
creating a casting of your finger you're using body double from smooth on which
is just a casting silicone use it before specifically for life casting and life
casting is accurate as possible we've done life casts with before and you mix
in a little bit material in as well I mixed in a thickener called 5x it's a
instead of using like abyssal or something phew me to thicken it it's
just a couple drops of this liquid and it gets thick and then your in terms of
the making the mold you did a thin coating of silicone just get into those
grooves to make sure it's a strong relief perfect copy and then just
slather some of that silicone on top yeah I kind of smeared it into the
grooves of my fingertip and then built it up so it has some thickness all right
so now it's time to wait till this cures okay while the silicone mold Frank on
your finger is curing let's begin experiment two another way we thought we
could spoof touch ID is if someone left their fingerprint on a piece of glass
for example and we captured it photographically so we had you put your
your index finger right here and on some baby powder and put it right on this
piece of foam core this is basically the equivalent if you had a greasy fingers
and put it on the glass for example which is what the computer the CCC group
did so we took a photo of this I took a macro photo blew it up very
high-resolution with my camera and then processed it on a computer to scale it
to be exactly the size of your figure measured it is about an inch tall and
then I laser etched it so try several variations laser etched of different
relief with laser etching different different steps change the color
inverted it but basically use this as a substitute for your finger and then mold
on top of that or cast on top of that we're not sure that's going to work
either but if we also want to create the molds here and also using so
sure so I ran some body double onto these edged parts to see how they come
out and some of them look like though they're actually going to work so what
we want to do is we want to dust this with graphite and then put some more
silicone on top of this and then we can use it as kind of a finger pad you know
because it's thin and flexible and maybe that exactly won't work so right let's
so we can do some mental gymnastics here the photo of your fingerprint which I
blew up and high contrast it to make sure that all the curbs are very visible
that was the reverse of what your actual fingerprint is and so without inverting
it without flipping it back and just fetching that basically what you're
going to get on the etch is what you would get on the foam core here or a
fingerprint on the phone yeah and so when we create the silicone casting on
top of that this isn't the mold this is the fingerprint yes okay so put some
graphite on there and then we'll we'll mix up some more body double and we'll
add a little bit of graphite into the body double guys to help with
capacitance maybe I don't know
it's black like tar so the cast of your finger is about done yeah this is all
solid now so well you just kind of peel it off and because it's in all the
detail on my fingers kind of got a lot of suction that's good yeah take a look
at that I can flip that inside-out which will be fine and see all those ridges
and grooves so you go Internet copy this and go hack all my passwords it's good
lookin fingerprint so what we'll do is we'll put a couple different materials
into this but we have another copy of the fingerprint itched and a different
dpi yes we'll smear some more stuff into
that yeah my my question and my concern with the laser etching is the resolution
that you can etch and you can change that on the laser cutter and so I have
500 PPI 600 PPI and 800 PPI refer that the higher dpi it's not the same point
per inch and the higher go the more chance also that the acrylic will just
get fused into the crevices and the dust will take away something detail but that
looks I mean you can recognize it as a fingerprint
I just don't know it would be good enough the full touch ID you don't know
if we're good enough to full touch ID are we smart an apple oh why not
all right back to experiment one the hand cast the finger cast and you wanna
put some silicone in there yeah so first thing we want to do is hit it with a
little bit of release so it's just easier at least 200 we actually haven't
seen used mold release before this extends a life of your molds yeah if you
want to cast like urethane parts or something like that it this works great
just happens to be what I have sitting around right now and I want to put a
release on there because nothing sticks to silicone but other silicones we're
going to be putting silicone in here so I wanna so I'm spraying it in and then
I'm just kind of rubbing it around so what I'm gonna do on this first is I'll
get a little bit of graphite and rub some graphite into the surface kind of
how I dusted the etching I'm going to be careful we want this is really tricky
because we want just enough graphite to activate touch ID and the activation
actually I think happens around the ring of the home button but we don't want too
much graphite because that might take away the detail I want to imagine Apple
engineers watching this and just laughing their butts off those fools
those morons they'll never do it so this is the rubber that I'm going to use
that's the 10 durometer for the stuff we were using the body double just because
it was a real thin and it'll just serve as like a pad that we put on our finger
so this one I'll make one that's kind of a full finger right order like this
stuff and then I'll do another one that's just kind of just a tad and we
can put on top of any other finger
all right so the castings are done silicone is cured it's time to pop them
out of the molds yep so what we have here we actually did more than one and
it's silicone casting from a silicone mold pops out and how the fingerprints
look I think that the detail is really great
it's about as exact replicas as you can get of your fingerprint but you know
we'll see if it reads in the touch ID and then also the silicone we use on top
of the laser etching we pulled those out as well and the advantage of doing these
is that it's if someone wanted to spoof another person's fingerprint this is
more likely how they are going to be able to do it they're not going to be
able to get someone put their finger in a mold for 15 to 20 minutes they're more
likely to take a photo of their fingerprint from a touch pad from piece
of glass or something and then see they can laser etch it yeah
plus these are thinner yeah the thinner so that'll help with the capacitance
like your finger it's like if you're wearing a pair rubber gloves and you can
you can still activate your phone so so let's do a first test which is a test of
capacitance let's unlock this phone I just type in the passcode and show that
using the graphite and few silicon whether that works just to manipulate
the touch screen all right that seems to be working let's try it with this now
that's Frank's finger oh no capacitance um we could try
wetting it we could try bristle or a graphite on top of it yeah we could try
those two things this is tough cuz water speeds off of silicone okay okay a wet
finger wet finger casting that activates the screen mm-hmm now we don't know how
that's going to affect touch ID so this one's dusted with extra graphite see
that works it does does great so pass against is working okay so here comes
the moment of truth or failure or fan the moment of failure potential failure
we'll call it that I'm going to hit the top button to the screen
it's going to want to unlock I'm going to show that for example my finger does
not unlock this your finger dies on my finger that it was molded does a lot
doesn't lock and then let's put that on top of there huh and unlocked it'll not
holy moly we fucking did it I'm genuine shot good
morning how do you think this is well let's see
if we duplicate that alright okay alright let's let's do it this is the
finger that's right and let's prove that this finger here does not work trying
not work okay oh we did it
huge success testimony experiment one a success I'm going to try it on on with
my finger
so let's talk about what did work okay in experiment one we did a silicone
casting of your finger yep with a mold a silicone mold that you carefully made
also the same index finger ya know with the silicone casting we infused it with
graphite which by itself didn't seem to activate enough to activate the
capacitance ring it on the touch ID sensor but by brushing graphite on top
of it okay that actually let it register as a finger yeah and with one of our
castings we're able to unlock the phone okay and the quota thing even is that on
new iPhones iPhone 6 and 6-plus touch ID is theoretically even more improve the
sensor we have inside is higher resolution in even on the 6 plus where
we trained beforehand your your index finger but not mine it unlocks so now I
can unlock wills phone anytime I want well with your fingerprint with standard
it yes but the other thing with the test of course is the laser etching process
this is taking a high-resolution photograph of your fingerprint left on a
surface okay laser etching it and creating a mold of that so we've cut
out a bunch of our laser etched fingers let's go back to the 5s and let's see if
this works so here I have your finger your fingerprint theoretically on top of
mine try again on do something so unfortunately the laser etched and then
cast silicon fingerprint doesn't work what's interesting is that it does
recognize on the touch ID that it is trying a fingerprint okay which if you
put any other capacitive surface on there like a hot dog right it would it
knows that that's not a finger so won't even try so we got it to try we got it
to fail but we couldn't get it to recognize as your finger nope
at least we got one of them at least we got one of them this is really cool it's
a learn you know basically how touch ID works in practice we recognize it it is
it does you don't need a warm finger all you need is something that has the
fidelity in terms of the resolution of your fingertip and also has capacitance
enough capacitance to activate the ring yeah and so if your finger was chopped
off theoretically it would still work there you go there you go
touch ID tested the fun project with Frank Ippolito
what else did you do you did a bunch of other tests here during the week when I
was at lunch and stuff like that I tried a bunch of different things one thing I
did was take a ball of clay and just push my finger into it to get a
fingerprint in the clay and then I would put silicone into there that didn't work
either that's these are attempts at just doing a fingerprint in clay so that's
not enough resolution the the silicone mold is it gets a better resolution so
that's kind of the way to do that try different ways and you know what if you
have any experience with special effects or casting or give ideas the Chaos
Computer Club they posted their instructions we'd love to see your
videos or your attempts at spoofing touch ID but this is not fun yeah it was
cool I've never I've always thought about this and never
really tried it but now we kind of know sort of what works it's a fun experiment
touch ID tested here on Tesla thank you Frank Ippolito Thank You Tessa premium
members for bringing this video thanks move on for getting us stuff - thanks
smooth on before materials again we use their body double we use a dragon skin
and they have a lot of materials it's fun stuff and find more of the stuff on
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