David Birch: A new way to stop identity theft

48,956 views ・ 2015-07-15

TED


Please double-click on the English subtitles below to play the video.

00:13
So I thought I'd talk about identity.
0
13841
1762
00:15
That's sort of an interesting enough topic to me.
1
15627
2521
00:18
And the reason was, because when I was asked to do this,
2
18172
3384
00:21
I'd just read in one of the papers, I can't remember,
3
21580
3428
00:25
something from someone at Facebook saying,
4
25032
2872
00:27
"Well, we need to make everybody use their real names,
5
27928
2585
00:30
and then that's basically all the problems solved."
6
30537
2444
00:33
And that's so wrong,
7
33005
1455
00:34
that's such a fundamentally reactionary view of identity,
8
34484
3723
00:38
and it's going to get us into all sorts of trouble.
9
38231
2398
00:40
And so what I thought I'd do is,
10
40653
1543
00:42
I'll explain four sort of problems about it,
11
42220
3957
00:46
and then I'll suggest a solution,
12
46201
1798
00:48
which, hopefully, you might find interesting.
13
48023
2117
00:50
So just to frame the problem:
14
50164
1756
00:51
What does "authenticity" mean?
15
51944
1765
00:53
That's me,
16
53733
1541
00:55
that's a camera phone picture of me looking at a painting.
17
55298
4620
00:59
[What's the Problem?]
18
59942
1062
01:01
That's a painting that was painted by a very famous forger,
19
61028
2782
01:03
and because I'm not very good at presentations,
20
63834
2206
01:06
I already can't remember the name that I wrote on my card.
21
66064
2740
01:08
And he was incarcerated in, I think, Wakefield Prison,
22
68828
3607
01:12
for forging masterpieces by, I think, French Impressionists.
23
72459
3772
01:16
And he's so good at it that when he was in prison,
24
76255
2889
01:19
everybody in prison, the governor and whatever,
25
79168
2196
01:21
wanted him to paint masterpieces to put on the walls
26
81388
2439
01:23
because they were so good.
27
83851
1245
01:25
And so that's a masterpiece, which is a fake of a masterpiece,
28
85120
3177
01:28
and bonded into the canvas is a chip which identifies that as a real fake,
29
88321
6686
01:35
if you see what I mean.
30
95031
1160
01:36
(Laughter)
31
96215
1053
01:37
So when we're talking about authenticity,
32
97292
2283
01:39
it's a little more fractal than it appears,
33
99599
2298
01:41
and that's a good example to show it.
34
101921
2184
01:44
I tried to pick four problems that will frame the issue properly.
35
104129
5303
01:49
So the first problem, I thought, chip and PIN, right?
36
109456
2490
01:51
[Banks and legacies bringing down the system from within]
37
111970
2697
01:54
[Offline solutions do not work online]
38
114691
1821
01:56
Everyone's got a chip and PIN card, right?
39
116536
2000
01:58
So why is that a good example?
40
118560
1443
02:00
That's the example of how legacy thinking about identity
41
120027
2777
02:02
subverts the security of a well-constructed system.
42
122828
2851
02:05
That chip-and-PIN card that's in your pocket
43
125703
3064
02:08
has a little chip on it that cost millions of pounds to develop,
44
128791
3021
02:11
is extremely secure,
45
131836
1425
02:13
you can put scanning electron microscopes on it,
46
133285
2368
02:15
you can try and grind it down, blah blah blah.
47
135677
2170
02:17
Those chips have never been broken, whatever you read in the paper.
48
137871
3387
02:21
And for a joke, we take that supersecure chip,
49
141282
3259
02:24
and we bond it to a trivially counterfeitable magnetic stripe.
50
144565
3651
02:28
And for very lazy criminals, we still emboss the card.
51
148240
3191
02:31
So if you're a criminal in a hurry and you need to copy someone's card,
52
151455
3651
02:35
you can just stick a piece of paper on it and rub a pencil over it
53
155130
3141
02:38
just to speed things up.
54
158295
1179
02:39
And even more amusingly, and on my debit card, too,
55
159498
2834
02:42
we print the name and the sort code and everything else on the front.
56
162356
3278
02:45
Why?
57
165658
1550
02:47
There is no earthly reason why your name is printed on a chip-and-PIN card.
58
167754
4113
02:51
And if you think about it,
59
171891
1897
02:53
it's even more insidious and perverse than it seems at first.
60
173812
3000
02:56
Because the only people that benefit from having the name on the card
61
176836
3513
03:00
are criminals.
62
180373
1155
03:01
You know what your name is, right?
63
181552
1621
03:03
(Laughter)
64
183197
1007
03:04
And when you go into a shop and buy something,
65
184228
2325
03:06
it's a PIN -- he doesn't care what the name is.
66
186577
2395
03:08
The only place you ever have to write your name on the back
67
188996
2778
03:11
is in America.
68
191798
1155
03:12
Whenever I go to America,
69
192977
1201
03:14
and I have to pay with a magstripe on the back of the card,
70
194202
2833
03:17
I always sign it "Carlos Tethers" anyway, just as a security mechanism,
71
197059
3355
03:20
because if a transaction ever gets disputed,
72
200438
2060
03:22
and it comes back and it says "Dave Birch,"
73
202522
2006
03:24
I know it must have been a criminal,
74
204552
1727
03:26
because I would never sign it "Dave Birch."
75
206303
2224
03:28
(Laughter)
76
208551
1254
03:29
So if you drop your card in the street,
77
209829
2043
03:31
it means a criminal can pick it up and read it.
78
211896
2205
03:34
They know the name, from the name, they can find the address,
79
214125
2858
03:37
and then they can go off and buy stuff online.
80
217007
2171
03:39
Why do we put the name on the card?
81
219202
1679
03:40
Because we think identity is something to do with names,
82
220905
3581
03:44
and because we're rooted in the idea of the identity card,
83
224510
4042
03:48
which obsesses us.
84
228576
1178
03:49
And I know it crashed and burned a couple of years ago,
85
229778
2592
03:52
but if you're someone in politics or the Home Office or whatever,
86
232394
3910
03:56
and you think about identity,
87
236328
1424
03:57
you can only think of identity in terms of cards with names on.
88
237776
3216
04:01
And that's very subversive in a modern world.
89
241016
2815
04:04
So the second example I thought I'd use
90
244427
2253
04:06
is chat rooms.
91
246704
1795
04:08
[Chatrooms and Children]
92
248523
1156
04:09
I'm very proud of that picture.
93
249703
1488
04:11
That's my son playing in his band with his friends
94
251215
2494
04:13
for the first-ever gig, I believe you call it, where he got paid.
95
253733
3935
04:17
(Laughter)
96
257692
1041
04:18
And I love that picture.
97
258757
1727
04:20
I'll like the picture of him getting into medical school a lot better,
98
260508
3292
04:23
(Laughter)
99
263824
1016
04:24
I like that one for the moment.
100
264864
1496
04:26
Why do I use that picture?
101
266384
1251
04:27
Because that was very interesting, watching that experience as an old person.
102
267659
4486
04:32
So him and his friends,
103
272169
1355
04:33
they get together, they booked a room, like a church hall,
104
273548
2855
04:36
and they got all their friends who had bands, got them together,
105
276427
3063
04:39
and they do it all on Facebook,
106
279514
1478
04:41
and then they sell tickets, and the first band on the --
107
281016
3588
04:44
I was going to say "menu," that's probably the wrong word for it, isn't it?
108
284628
3601
04:48
The first band on the list of bands
109
288253
1906
04:50
that appears at some public music performance of some kind
110
290183
3817
04:54
gets the sales from the first 20 tickets,
111
294024
2579
04:56
then the next band gets the next 20,
112
296627
1721
04:58
and so on.
113
298372
1169
04:59
They were at the bottom of the menu, like, fifth,
114
299565
2286
05:01
I thought they had no chance.
115
301875
1384
05:03
He actually got 20 quid. Fantastic, right?
116
303283
2058
05:05
But my point is, that all worked perfectly,
117
305365
2034
05:07
except on the web.
118
307423
2304
05:09
So they're sitting on Facebook,
119
309751
2592
05:12
and they're sending these messages and arranging things,
120
312367
2640
05:15
and they don't know who anybody is, right?
121
315031
2585
05:17
That's the problem we're trying to solve.
122
317640
1966
05:19
If only they were using real names,
123
319630
1671
05:21
then you wouldn't be worried about them on the internet.
124
321325
2627
05:23
So when he says to me,
125
323976
1160
05:25
"Oh, I want to go to a chat room to talk about guitars" or something,
126
325160
4045
05:29
I'm like, "Oh, well, I don't want you to go into a chat room
127
329229
3125
05:32
to talk about guitars,
128
332378
1684
05:34
because they might not all be your friends,
129
334086
2025
05:36
and some of the people that are in the chat room
130
336135
2273
05:38
might be, you know, perverts and teachers and vicars --"
131
338432
3221
05:41
(Laughter)
132
341677
1770
05:43
I mean, they generally are, when you look in the paper, right?
133
343471
3271
05:46
"So I want to know who all the people in the chat room are.
134
346766
2981
05:49
So, OK, you can go in the chat room,
135
349771
1763
05:51
but only if everybody in the chat room is using their real names,
136
351558
3100
05:54
and they submit full copies of their police report."
137
354682
2964
05:57
(Laughter)
138
357670
1154
05:58
But of course, if anybody in the chat room asked for his real name,
139
358848
3195
06:02
I'd say, "No. You can't give them your real name,
140
362067
2520
06:04
because what happens if they turn out to be perverts
141
364611
2498
06:07
and teachers and whatever?"
142
367133
2184
06:09
So you have this odd sort of paradox
143
369341
1811
06:11
where I'm happy for him to go into this space
144
371176
2151
06:13
if I know who everybody else is,
145
373351
1842
06:15
but I don't want anybody else to know who he is.
146
375217
2603
06:17
And so you get this sort of logjam around identity,
147
377844
2413
06:20
where you want full disclosure from everybody else,
148
380281
2402
06:22
but not from yourself.
149
382707
1156
06:23
And there's no progress, we get stuck.
150
383887
1848
06:25
So the chat room thing doesn't work properly,
151
385759
2117
06:27
and it's a very bad way of thinking about identity.
152
387900
2606
06:30
Cheerleading ... so, on my RSS feed, I saw this thing about --
153
390937
3825
06:34
I just said something bad about my RSS feed, didn't I?
154
394786
2572
06:37
I should stop saying it like that.
155
397382
1626
06:39
For some random reason I can't imagine,
156
399032
1860
06:40
something about cheerleaders turned up in my in-box.
157
400916
2441
06:43
And I read this story about cheerleaders, and it's a fascinating story.
158
403381
3354
06:46
This happened a couple of years ago in the US.
159
406759
2154
06:48
There were some cheerleaders in a team at a high school in the US,
160
408937
3303
06:52
and they said mean things about their cheerleading coach,
161
412264
2782
06:55
as I'm sure kids do about all of their teachers all of the time,
162
415070
3772
06:58
and somehow, the cheerleading coach found out about this.
163
418866
2679
07:01
She was very upset.
164
421569
1159
07:02
So she went to one of the girls and said,
165
422752
1986
07:04
"You have to give me your Facebook password."
166
424762
2113
07:06
I read this all the time,
167
426899
1207
07:08
where even at some universities and places of education,
168
428130
2670
07:10
kids are forced to hand over their Facebook passwords.
169
430824
2539
07:13
So you have to give them your Facebook password.
170
433387
2250
07:15
So the kid -- she was a kid! -- what she should have said is,
171
435661
2872
07:18
"My lawyer will be calling you first thing in the morning.
172
438557
2737
07:21
It's an outrageous imposition on my Fourth Amendment right to privacy.
173
441318
3310
07:24
You'll be sued for all the money you've got!"
174
444652
2142
07:26
That's what she should have said.
175
446818
1580
07:28
But she's a kid, so she hands over the password.
176
448422
2259
07:30
The teacher can't log in,
177
450705
1407
07:32
because the school has blocked access to Facebook.
178
452136
2397
07:34
So the teacher can't log into Facebook till she gets home.
179
454557
2783
07:37
So the girl tells her friends,
180
457364
1437
07:38
"Guess what happened? The teacher logged in. She knows."
181
458825
2691
07:41
So the girls all logged into Facebook and deleted their profiles.
182
461540
3135
07:44
So when the teacher logged in, there was nothing there.
183
464699
2590
07:47
My point is: those identities, they don't think about them the same way.
184
467313
3982
07:51
Identity is -- especially when you're a teenager -- a fluid thing.
185
471319
3850
07:55
You have lots of identities, you experiment with them.
186
475193
2536
07:57
And if you have an identity you don't like because it's subverted in some way
187
477753
3680
08:01
or it's insecure or it's inappropriate,
188
481457
1858
08:03
you just delete it and get another one.
189
483339
1868
08:05
The idea that you have an identity that's given to you by someone,
190
485231
3227
08:08
the government or whatever,
191
488482
1299
08:09
and you have to stick with that identity and use it in all places
192
489805
3064
08:12
is absolutely wrong.
193
492893
1153
08:14
Why would you want to really know who someone was on Facebook,
194
494070
2927
08:17
unless you wanted to abuse them and harass them in some way?
195
497021
2825
08:19
It just doesn't work properly.
196
499870
1896
08:21
And my fourth example is,
197
501790
1450
08:23
there are some cases where you really want to be --
198
503264
3206
08:26
in case you're wondering, that's me at the G20 protest.
199
506494
3547
08:30
I wasn't actually at the G20 protest,
200
510065
1762
08:31
but I had a meeting at a bank on the day of the G20 protest.
201
511851
4056
08:35
And I got an email from the bank, saying,
202
515931
1982
08:37
"Please don't wear a suit, because it'll inflame the protesters."
203
517937
3278
08:41
I look pretty good in a suit, frankly,
204
521239
2340
08:43
so you can see why it would drive them into an anticapitalist frenzy.
205
523603
3294
08:46
(Laughter)
206
526921
1008
08:47
So I thought, "Well, if I don't want to inflame the protesters,
207
527953
3243
08:51
the obvious thing to do is go dressed as a protester."
208
531220
2605
08:53
So I went dressed completely in black, you know, black balaclava ...
209
533849
3381
08:57
I had black gloves on but took them off to sign the visitors' book.
210
537254
3162
09:00
(Laughter)
211
540440
1002
09:01
I'm wearing black trousers and boots, I'm dressed completely in black.
212
541466
3298
09:04
I go into the bank at 10am and go, "Hi, I'm Dave Birch,
213
544788
2590
09:07
I've got a 3 o'clock with so-and-so."
214
547402
1770
09:09
"Sure!" And they sign me in. There's my visitor's badge.
215
549196
2672
09:11
(Laughter)
216
551892
1002
09:12
So this nonsense about "you've got to have real names on Facebook" and whatever,
217
552918
3848
09:16
that gets you that kind of security.
218
556790
1776
09:18
That gets you "security theater,"
219
558590
2101
09:20
where there's no actual security,
220
560715
1947
09:22
but people are sort of playing parts in a play about security,
221
562686
3302
09:26
and as long as everybody learns their lines,
222
566012
2099
09:28
everyone's happy.
223
568135
1153
09:29
But it's not real security, right?
224
569312
1972
09:32
Especially because I hate banks more than the G20 protesters do,
225
572036
3037
09:35
because I work for them.
226
575097
1161
09:36
I know that things are actually worse than these guys think.
227
576282
3183
09:39
(Laughter)
228
579489
2043
09:42
But suppose I worked next to somebody in a bank
229
582472
4881
09:47
who was doing something --
230
587377
1387
09:48
you know, they were like people who take the money from banks and don't ...
231
588788
4699
09:53
you know, they take the money ...
232
593511
1584
09:55
Oh -- "traders." That's the word I was thinking of.
233
595119
2386
09:57
Suppose I was sitting next to a rogue trader,
234
597529
2104
09:59
and I want to report it to the boss of the bank.
235
599657
2260
10:01
So I log on to do a little whistleblowing.
236
601941
2006
10:03
I send a message, "This guy's a rogue trader."
237
603971
2157
10:06
That message is meaningless
238
606152
1332
10:07
if you don't know that I'm a trader at the bank.
239
607508
2568
10:10
If that message just comes from anybody,
240
610100
1937
10:12
it has zero information value.
241
612061
2634
10:14
There's no point in sending that message.
242
614719
2031
10:16
You have to know that I'm ...
243
616774
2067
10:18
But if I have to prove who I am,
244
618865
2418
10:21
I'll never send that message.
245
621307
1745
10:23
It's just like the nurse in the hospital reporting the drunk surgeon.
246
623076
3589
10:26
That message will only happen if I'm anonymous.
247
626689
3081
10:29
So the system has to have ways of providing anonymity in it,
248
629794
4424
10:34
otherwise, we don't get where we want to get to.
249
634242
2278
10:36
So, four issues.
250
636544
2084
10:38
So what are we going to do about it?
251
638652
2311
10:40
Well, what we tend to do about it
252
640987
3100
10:44
is we think about Orwell-space.
253
644111
2570
10:46
And we try to make electronic versions of the identity card
254
646705
3840
10:50
that we got rid of in 1953.
255
650569
1572
10:52
So we think if we had a card --
256
652165
2531
10:54
call it a Facebook login --
257
654720
1414
10:56
which proves who you are,
258
656158
1196
10:57
and I make you carry it all the time,
259
657378
1781
10:59
that solves the problem.
260
659183
1156
11:00
And of course, for all those reasons I've just outlined, it doesn't,
261
660363
3230
11:03
and it might make some problems worse.
262
663617
1826
11:05
The more times you're forced to use your real identity,
263
665467
2602
11:08
certainly in transactional terms,
264
668093
1579
11:09
the more likely that identity is to get stolen and subverted.
265
669696
2897
11:12
The goal is to stop people from using identity
266
672617
2153
11:14
in transactions which don't need identity,
267
674794
2021
11:16
which is actually almost all transactions.
268
676839
2258
11:19
Almost all of the transactions you do are not "Who are you?"
269
679121
4054
11:23
They're "Are you allowed to drive the car?"
270
683199
2070
11:25
"Are you allowed in the building?" "Are you over 18?"
271
685293
2514
11:27
etcetera, etcetera.
272
687831
1953
11:29
So my suggestion -- I, like James,
273
689808
1687
11:31
think that there should be a resurgence of interest in R and D.
274
691519
3021
11:34
I think this is a solvable problem.
275
694564
1674
11:36
It's something we can do about.
276
696262
1484
11:37
Naturally, in these circumstances, I turn to Doctor Who.
277
697770
3029
11:40
Because in this --
278
700823
1153
11:42
(Laughter)
279
702000
1001
11:43
as in so many other walks of life,
280
703025
1665
11:44
Doctor Who has already shown us the answer.
281
704714
2699
11:47
So I should say, for some of our foreign visitors:
282
707437
3173
11:50
Doctor Who is the greatest living scientist in England --
283
710634
3756
11:54
(Laughter)
284
714414
1665
11:56
and a beacon of truth and enlightenment to all of us.
285
716103
2806
11:58
And this is Doctor Who with his "psychic paper."
286
718933
3015
12:01
Come on, you guys must have seen Doctor Who's "psychic paper."
287
721972
2947
12:04
You're not nerds if you say yes.
288
724943
1943
12:06
Who's seen Doctor Who's psychic paper?
289
726910
2286
12:09
Oh right, you were in the library the whole time studying, I guess.
290
729220
3209
12:12
Is that what you're going to tell us?
291
732453
1781
12:14
Doctor Who's psychic paper is:
292
734258
1444
12:15
when you hold up the psychic paper,
293
735726
1667
12:17
the person, in their brain,
294
737417
1347
12:18
sees the thing that they need to see.
295
738788
2127
12:20
So I want to show you a British passport,
296
740939
2402
12:23
I hold up the psychic paper,
297
743365
1352
12:24
you see a British passport.
298
744741
1315
12:26
I want to get into a party,
299
746080
1627
12:27
I hold up the psychic paper,
300
747731
1384
12:29
I show you a party invitation.
301
749139
1430
12:30
You see what you want to see.
302
750593
1933
12:32
So what I'm saying is, we need to make an electronic version of that,
303
752550
3290
12:35
but with one tiny, tiny change,
304
755864
2206
12:38
which is that it'll only show you the British passport
305
758094
2573
12:40
if I've actually got one.
306
760691
1193
12:41
It'll only show you the party invitation if I actually have one.
307
761908
3003
12:44
It will only show you that I'm over 18 if I actually am over 18.
308
764935
3046
12:48
But nothing else.
309
768005
1232
12:49
So you're the bouncer at the pub, you need to know that I'm over 18.
310
769998
4806
12:54
Instead of showing you my driving license,
311
774828
2021
12:56
which shows you I know how to drive,
312
776873
1725
12:58
what my name is, my address, all these kind of things,
313
778622
2770
13:01
I show you my psychic paper,
314
781416
1489
13:02
and all it tells you is, am I over 18 or not.
315
782929
2433
13:06
Right.
316
786051
1344
13:07
Is that just a pipe dream?
317
787419
1474
13:08
Of course not, otherwise I wouldn't be here talking.
318
788917
2578
13:11
So, in order to build that and make it work,
319
791519
2056
13:13
I'm only going to name these things, I'll not go into them:
320
793599
2763
13:16
we need a plan,
321
796386
1439
13:17
which is, we're going to build this as an infrastructure
322
797849
2635
13:20
for everybody to use to solve all of these problems.
323
800508
2451
13:22
We're going to make a utility.
324
802983
1628
13:24
The utility has to be universal, you can use it everywhere.
325
804635
2777
13:27
I'm just giving you little flashes of the technology as we go along.
326
807436
3211
13:30
That's a Japanese ATM,
327
810671
1160
13:31
the fingerprint template is stored inside the mobile phone.
328
811855
2778
13:34
So when you want to draw money out,
329
814657
1706
13:36
you put the phone on the ATM and touch your finger,
330
816387
2406
13:38
your fingerprint goes through to the phone,
331
818817
2011
13:40
the phone says, "Yes, that's whoever,"
332
820852
1810
13:42
and the ATM then gives you some money.
333
822686
1822
13:44
It has to be a utility that you can use everywhere.
334
824532
3011
13:47
It has to be absolutely convenient.
335
827567
1839
13:49
That's me going into the pub.
336
829430
3144
13:52
All the device on the door of the pub is allowed is:
337
832598
2889
13:55
Is this person over 18 and not barred from the pub?
338
835511
3650
13:59
And so the idea is, you touch your ID card to the door,
339
839185
3154
14:02
and if I'm allowed in, it shows my picture,
340
842363
2014
14:04
if I'm not, it shows a red cross.
341
844401
1573
14:05
It doesn't disclose any other information.
342
845998
2003
14:08
It has to have no special gadgets.
343
848025
1623
14:09
That can only mean one thing, following on from Ross's statement,
344
849672
3055
14:12
which I agree with completely: if it means no special gadgets,
345
852751
2913
14:15
it has to run on a mobile phone.
346
855688
1526
14:17
That's the only choice we have, to make it work on mobile phones.
347
857238
3049
14:20
There are 6.6 billion mobile phone subscriptions.
348
860311
2302
14:22
My favorite statistic of all time: only 4 billion toothbrushes in the world.
349
862637
3594
14:26
That means something. I don't know what.
350
866255
1905
14:28
(Laughter)
351
868184
1068
14:29
I rely on our futurologists to tell me.
352
869276
2200
14:31
It has to be a utility which is extensible.
353
871500
2081
14:33
So it has to be something that anybody could build on.
354
873605
2533
14:36
Anybody should be able to use this infrastructure;
355
876162
2343
14:38
you don't need permissions, licenses, whatever.
356
878529
2254
14:40
Anyone should be able to write some code to do this.
357
880807
3732
14:45
Well, you know what symmetry is, so you don't need a picture of it.
358
885427
3229
14:48
This is how we're going to do it.
359
888680
1582
14:50
We're going to do it using phones and mobile proximity.
360
890286
2586
14:52
I'm going to suggest to you
361
892896
1465
14:54
the technology to implement Doctor Who's psychic paper is already here,
362
894385
3472
14:57
and if any of you have got one of the new Barclay's debit cards
363
897881
2965
15:00
with the contactless interface on it,
364
900870
1771
15:02
you've already got that technology.
365
902665
2200
15:04
Have you ever been up to the big city and used an Oyster card?
366
904889
2936
15:07
Does that ring a bell?
367
907849
1154
15:09
The technology already exists.
368
909027
1438
15:10
The first phones that have the technology built in --
369
910489
2484
15:12
the Google Nexus, the S II, the Samsung Wave 578 --
370
912997
2553
15:15
the first phones that have the technology built into them are already in the shops.
371
915574
3929
15:19
So the idea that the gasman can turn up at my mum's door,
372
919527
2894
15:22
and he can show my mum his phone,
373
922445
1931
15:24
and she can tap it with her phone,
374
924400
1710
15:26
and it'll come up with green if he really is from British Gas
375
926134
2869
15:29
and allowed in,
376
929027
1156
15:30
and will come up with red if he isn't, end of story.
377
930207
2437
15:32
We have the technology to do that.
378
932668
1626
15:34
And what's more,
379
934318
1153
15:35
although some of those things sound a bit counterintuitive,
380
935495
2767
15:38
like proving I'm over 18 without proving who I am,
381
938286
2345
15:40
the cryptography to do that not only exists,
382
940655
2056
15:42
it's extremely well-known and well-understood.
383
942735
2154
15:44
Digital signatures, the blinding of public key certificates --
384
944913
2927
15:47
these technologies have been around for a while,
385
947864
2254
15:50
we've just had no way of packaging them up.
386
950142
2010
15:52
So the technology already exists.
387
952176
1584
15:53
We know it works.
388
953784
3300
15:57
There are a few examples of the technology being used
389
957108
2483
15:59
in experimental places.
390
959615
1235
16:00
That's London Fashion Week,
391
960874
1305
16:02
where we built a system with O2.
392
962203
1851
16:04
That's for the Wireless Festival in Hyde Park.
393
964078
2616
16:06
You can see the person's walking in with their VIP band,
394
966718
2664
16:09
it's being checked by the Nokia phone that's reading the band.
395
969406
2915
16:12
I'm only putting those up to show you these things are prosaic,
396
972345
2981
16:15
this stuff works in these environments.
397
975350
1859
16:17
They don't need to be special.
398
977233
1430
16:18
So finally, I know that you can do this,
399
978687
5481
16:24
because if you saw the Easter special of Doctor Who,
400
984192
4597
16:28
where he went to Mars in a bus --
401
988813
3539
16:32
I should say, again, for our foreign students:
402
992376
2177
16:34
that doesn't happen in every episode.
403
994577
1767
16:36
This was a very special case.
404
996368
1414
16:37
So in the episode where he goes to Mars in a London bus --
405
997806
2924
16:40
I can't show you the clip,
406
1000754
1248
16:42
due to the outrageous restrictions of Queen Anne-style copyright
407
1002026
3078
16:45
by the BBC --
408
1005128
1286
16:46
but in the episode where he goes to Mars in a London bus,
409
1006438
2922
16:49
Doctor Who is clearly shown getting onto the bus
410
1009384
4035
16:53
with the Oyster card reader
411
1013443
1442
16:54
using his psychic paper.
412
1014909
1562
16:56
Which proves that psychic paper has an NFC interface.
413
1016495
3452
16:59
Thank you very much.
414
1019971
1175
17:01
(Applause)
415
1021170
1226
About this website

This site will introduce you to YouTube videos that are useful for learning English. You will see English lessons taught by top-notch teachers from around the world. Double-click on the English subtitles displayed on each video page to play the video from there. The subtitles scroll in sync with the video playback. If you have any comments or requests, please contact us using this contact form.

https://forms.gle/WvT1wiN1qDtmnspy7