1
00:00:00,100 --> 00:00:01,570
The consensus is central

2
00:00:01,420 --> 00:00:02,110
to blockchain,

3
00:00:02,260 --> 00:00:03,230
right? So making sure

4
00:00:03,080 --> 00:00:04,310
that there's a unique

5
00:00:04,160 --> 00:00:05,430
block at the given index

6
00:00:05,280 --> 00:00:07,090
prevents you from having

7
00:00:06,940 --> 00:00:07,670
double-spending.

8
00:00:07,670 --> 00:00:09,740
What we did back in

9
00:00:09,590 --> 00:00:13,580
2019 was to define an

10
00:00:13,430 --> 00:00:14,500
accountable consensus

11
00:00:14,350 --> 00:00:15,380
version, which means

12
00:00:15,230 --> 00:00:16,120
that, okay,

13
00:00:15,990 --> 00:00:17,020
if you cannot solve

14
00:00:16,870 --> 00:00:18,080
consensus, which means

15
00:00:17,930 --> 00:00:19,360
that you probably have

16
00:00:19,210 --> 00:00:20,960
hackers among the

17
00:00:20,810 --> 00:00:21,620
participants that are

18
00:00:21,470 --> 00:00:22,660
trying to double-spend,

19
00:00:22,730 --> 00:00:24,100
and that's how you

20
00:00:23,950 --> 00:00:24,820
couldn't solve

21
00:00:24,670 --> 00:00:25,380
consensus,

22
00:00:26,130 --> 00:00:27,620
then what you can do

23
00:00:27,970 --> 00:00:29,300
if you truly solve the

24
00:00:29,150 --> 00:00:30,180
accountable consensus

25
00:00:30,030 --> 00:00:31,160
problem is that you can

26
00:00:31,010 --> 00:00:32,560
identify who they are.

27
00:00:32,800 --> 00:00:34,990
And so suddenly you make

28
00:00:34,840 --> 00:00:35,910
everyone accountable in

29
00:00:35,760 --> 00:00:36,450
the sense that,

30
00:00:36,480 --> 00:00:37,990
okay, you can cheat if

31
00:00:37,840 --> 00:00:38,370
you want,

32
00:00:38,360 --> 00:00:39,170
you can try to

33
00:00:39,020 --> 00:00:39,610
double-spend,

34
00:00:40,160 --> 00:00:40,990
but you're gonna get

35
00:00:40,840 --> 00:00:42,450
caught. And there is no

36
00:00:42,300 --> 00:00:43,070
way around.

37
00:00:43,140 --> 00:00:43,890
There's gonna be an

38
00:00:43,740 --> 00:00:44,950
undeniable proof of

39
00:00:44,800 --> 00:00:45,570
fraud that will be

40
00:00:45,420 --> 00:00:46,690
generated and everyone

41
00:00:46,540 --> 00:00:47,550
will see that you're

42
00:00:47,400 --> 00:00:48,010
responsible.

43
00:00:48,310 --> 00:00:49,580
If you know that,

44
00:00:49,550 --> 00:00:50,280
you're going to think

45
00:00:50,130 --> 00:00:51,760
twice before cheating

46
00:00:51,610 --> 00:00:53,000
because there is a risk

47
00:00:52,850 --> 00:00:54,260
that you cannot even

48
00:00:54,110 --> 00:00:55,640
double-spend, but for

49
00:00:55,490 --> 00:00:56,340
sure you're going to get

50
00:00:56,190 --> 00:00:56,620
caught.