Scaling Blockchains - Computerphile

Scaling up blockchains is far from simple - Dr Shehar Bano of the Information Security Group at UCL dicusses some of the problems.

This video was filmed and edited by Sean Riley.

[grieske]

I admire that Dr Shehar Bano manages to talk about something substantial without non-functional pauses, hesitations, or saying "uhm".

[reDustt]

I could listen to her speak all day. Clear, conscise, informative.

[flymypg]

Dr. Bano gave the clearest and most succinct blockchain description and summary talk ever! Does she have other presentations you can recommend?

Perhaps a sequence of videos? I would very much like to see her start her own YouTube channel, much like her fellow Computerphile alumnus Rob Miles.

[jasonsharkey]

She gives a good interview. Well thought out. Interview her again!

[harriehausenman]

Very fine! She seems well prepared and watches her pronounciation very carefully. I understand her by far better than some scotsman talking way too fast :-) One of the best videos lately. And actually a lot of content again (for a change ;-/ )

[Qermaq]

Dr. Bano is smart, tells the story really clearly, and I could listen to her accent all day. But I smiled when she’d say we don’t want to get forked. No we do not!

[antnauman]

This was a very good and realistic explanation. It's the first video I came across which has described things the way they are.

I was hearing a lot about blockchain, and all were portraying it like it's the perfect thing. And the only thing bothering me was, how can they deal with latency so perfectly? I mean that's one of the major challenges when dealing with shared data. And if there was no problem with latency with current technology, then existing systems can also work equally well.
Secondly, what about scaling? Where would all the data go? In the age of cloud, where there's a probability that even OS would be in the cloud and we'll be just holding devices, there's a concept that all the world's data would be in our systems? Not possible of course. And if only some peers will handle it, then we're again back to where we're coming from.

But this video explains the goods of blockchain, and how there are some challenges which they're trying to deal with.

[jubinsoni]

Sheharji the way you have explained, I got reminded of my friend who used to teach me in college...plain, simple and in easy language

[XSpImmaLion]

Nice! One of the best, well laid out explanations on blockchain that I have heard so far... for my level of understanding I mean.

[gir]

I've got to say, this topic is massively interesting and the video was awesome. I was totally glued to her every word. Thank you numberphile!

[yusufefl]

To implement an electronic voting system on a blockchain infrastructure u need to address the issues 1.)the validation process of the voters and 2.)by doing that keeping the anonymity of the voters as well.

[BorjaTarraso]

This video is simply amazing about many of the issues which needs to be addressed due to lack of scalability of bitcoin desgin and blockchain technologies. As it passed 5 years, it could be good an update video of what has been solved or changed since then.

[jeffbrownstain]

Just found out my .28¢ worth of bitcoin I got a while ago has turned into $8 worth. Not bad.

[Treegrower]

She's very eloquent. Great interview.

[bdf]

Yeah, let's give these "leaders" such a big stake in the system that they won't want to misbehave.

That worked *so* well with banks.

What could possibly go wrong?

[rafabulsing]

The subject of the video is fascinating, but can we take a moment to compliment the presenter? She has such a clear way of speaking. No "uhh"s, "well"s and such. I was like she had it written beforehand and was just reading. I was listening to the video while doing the dishes, and it felt almost like an audiobook. Amazing stuff, I'd like to be this good at public speaking one day.

[Maxander]

Very good explanation. 10/10 ! Thank you Dr. Bano!

[ponderednamefordays]

This video has more than tripled its value over the last 15 hours.

[croxmeister]

Yeah, block chains scale up linearly. More transactions require bigger blocks, this is why all the focus is developing off chain settlement so that we can take 99.9% of transactions off the blockchain.

[drunkramen]

Well presented in an easily understood manner. Very informative. Thank you!