MIT 15.S12 Blockchain and Money, Fall 2018
Instructor: Prof. Gary Gensler
View the complete course: https://ocw.mit.edu/15-S12F18
YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63UUkfL0onkxF6MYgVa04Fn
This lecture covers blockchain consensus protocols. Because of the decentralized nature of blockchain technology, it is crucial that consensus protocols are used to require that the nodes on the network agree on the same state of a blockchain.
License: Creative Commons BY-NC-SA
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23 Comments
@sharkb6607 · October 9, 2026 at 4:19 am
Sometimes I'm not quite sure what the question is. I mean, I didn't understand what the question was. Has anybody felt the same as me?😅
@manish12.34 · October 9, 2026 at 4:19 am
Anybody in 2026 1:12:07
@patrickt.4121 · October 9, 2026 at 4:19 am
Mark Carney now the lead of the free world! How times have changed!
@SilentAsianRoach · October 9, 2026 at 4:19 am
Gresham’s law states good money chases out bad money. That could look like a situation where a good money acts like an asset until the bad money is out of the system. Either bitcoin and crypto it’s a little tougher because there is an education gap that I think precludes a lot of regular people. And with the criminal narrative that was thrown around I think some companies worry about using it because of being De-Banked. They may claim it’s tied to criminal activity even if it isn’t and freeze your cash.
@mark4161 · October 9, 2026 at 4:19 am
24:06
@johnny006 · October 9, 2026 at 4:19 am
He dont actually share much perfect video for ai to Compress into few sentences
@amolpatil05 · October 9, 2026 at 4:19 am
2025 I m learn blockchain
@suzanneal-kayali1594 · October 9, 2026 at 4:19 am
What is the incentive for validators? Who is doing the validation if the incentive is designed for miners?
@We-d9e · October 9, 2026 at 4:19 am
Thank you MIT & prof. Gary Gensler.
@RiccardoVincelli · October 9, 2026 at 4:19 am
58:54 Tadge Dryja introduced a theoretically clever way to address that issue, with a controlled collusion scheme called Proof of idle https://m.youtube.com/watch?v=QN2TPeQ9mnA
@RiccardoVincelli · October 9, 2026 at 4:19 am
Stuart Haber gets cited at least twice per class 29:52
@americancitizen748 · October 9, 2026 at 4:19 am
If all of the students in this class owned Bitcoin then they all did very well if they held on to it. Those who sold when it peaked did very well.
@CampingonCanadaCrownLands · October 9, 2026 at 4:19 am
To any young kids watching this who think they aren't smart enough to go to MIT, this class shows you probably can if you want to, this is like every high school class where 10% do the reading and answer questions and the rest are thinking about their social lives and half asleep. And that 10% aren't necessarily geniuses either.
@user-dc6tr3qe3w · October 9, 2026 at 4:19 am
Q: "is Bitcoin a deflationary currency?"
GG: "it depends on your use of that word."
@campusseoul · October 9, 2026 at 4:19 am
I like the slide on Bitcoin Mining Evolution.
@Bonora11 · October 9, 2026 at 4:19 am
Watching in 2022… great content!
@algoriticus · October 9, 2026 at 4:19 am
Had a fun time following this one. Did less rewinds than the previous lecture. Got it done faster understood 90% at depth. Woo!
@davecorley5514 · October 9, 2026 at 4:19 am
Voting in a democracy is a Byzantine General’s problem. Blockchain offers a method to gain more accurate voting results and come to a 50.00001% consensus more quickly. In the extreme, proof-of-work by every participant also makes the voting process more secure.
@DashT1000 · October 9, 2026 at 4:19 am
Since he is touching the topic of bizantine fault tolerance protocols and its determinism, he should make a parallelism with Ouroboros from Cardano to understand why it matters since its more resilient than BFT and its moderm adaptations..
@livelongprosper940 · October 9, 2026 at 4:19 am
Seriously
@benriggan5267 · October 9, 2026 at 4:19 am
Thanks, helpful intro.
@tradelinx1377 · October 9, 2026 at 4:19 am
Thanks to the good people at MIT for opening up their university to the world!
@billskinner8398 · October 9, 2026 at 4:19 am
21 winner winner chicken dinner 😉