Blockchain 101 - Part 2 - Public / Private Keys and Signing

This is part two in my basic visual introduction to the concepts behind a blockchain. We build on the concepts from the previous video and introduce public / private key pairs and signing using an interactive web demo.
If you missed it, part 1 is here: • Blockchain 101 - A Vis...
If you are interested in playing with this on your own, it is available online at:
anders.com/blockchain/public-p...
The code that runs this demo is also on GitHub:
github.com/anders94/public-pr...
If you want to know more about how public key cryptography works, see the Wikipedia page on it: en.wikipedia.org/wiki/Public-...
The details of how public keys relate to private keys are hard to summarize, but it has to do with Euler's theorem. Basically, using Euler's theorem there is some math you can do to a number given some parameters (which I'll call the public key) which allows someone with some other parameters (which I'll call the private key) to decipher the original number without having to do brute force factorization because there is a shortcut way to find the phi of a prime number. Rather than me butchering the explanation, check this video series out for a more detailed explanation: www.khanacademy.org/computing...
I'm @anders94 on Twitter and @andersbrownworth on Steemit.
Donations:
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[@DJSlimzilla]

This 2 Part series you've made needs to become the worldwide standard for teaching this subject. No where has anyone I've ever met been able to describe this in such clarity. All that come across your instruction will leave well informed, thanks to your efforts (myself included).

[@anders94]

Thanks very much. Much appreciated.

[@tomstoj]

Daaaaamn, that's the best explanation of blockchain I've ever seen in my life. Congrats!

[@charlesblubaugh946]

great explanation. You should have 1,000,000 views. Thanks

[@nickosc88]

Yes, your demonstration and interactive app has explained the BC much better than a lot of other youtube demos. Also, what sparked your interest in Byzantium? I am of Greek background but regardless, it is an era forgotten and under-emphasized in the current Western education paradigm, tres coole!

[@whatever2981]

Because "Byzantine generals problem" is the logical basis for reaching the consensus amongst peers (bc miners) where everybody trusts nobody.

[@anders94]

@@nickosc88 My brother had studied Byzantium and started telling me about it so we ended up recording a podcast about it (12 Byzantine Rulers) which the New York Times ultimately covered. That turned into a book deal for my brother (Lost to the West) and many other media appearances including the Wall Street Journal, NPR and Wired magazine as well as a show called "Ottoman Rising" which will soon be out on Netflix. (January, 2019)

[@delmike2633]

@@whatever2981 *Text Brsmith231 on Instagram. To get your private key.*

[@delmike2633]

@@nickosc88 *Text Brsmith231 on Instagram. To get your private key.*

[@masknecr]

I watched part1,2, this is so compact and at the same time contains all the core concept of the block chain! Thank you for creating this helped me so much.

[@huseyincan6457]

That's weird I just watched Blockchain 101 Part 1 and 30 min later you uploaded Part 2 after 1 year break :) Amazing visualisation. Thanks!

[@anders94]

Great timing!

[@JuanManuelVillar]

never leave a comment, but i have to congrat you, great work and thank you for the time invested.

[@zummotv1013]

can you please explain the verification part?

[@delmike2633]

*Text Cloudbase7 on Instagram. To get your private key.*

[@delmike2633]

@@zummotv1013 *Text Cloudbase7 on Instagram. To get your private key.*

[@xpressabhi]

I don't usually comment on KZbin videos. But you have done a hell of a good job in explaining the entire concept so easily. Thanks very much!

[@icloudtechnologies]

Thanks Anders for such simplified videos (part 1 and part 2). Looking forward to part 3.

[@rmdmrod]

Anders thank you for sharing. Please continue with your series of blockchain explanations. 👍

[@woutermonkhorst911]

Great video again, really helpful! Very cool to see the essence of the blockchain explained in such an easy to understand way.

[@arctiggs]

Thank you for both of these videos. They were extremely helpful in grasping the concept of a blockchain. Great use of the demo to help us understand the inner workings.

[@puneet1111]

Thank you so much.. This has been the best series for me to understand the basic mechanics of block chain..Much appreciated!

[@Andrew-ig5sp]

This video and part 1 are the videos I send to anyone asking me to explain what a blockchain is. So clear. Thank you for making these!

[@listeningears9009]

Best video out there explaining Blockchain, thank you! You're only missing timestamp

[@anders94]

Thanks. Yeah, I opted not to add them to reduce complexity and to not have to get into the inaccuracy of the timestamps. But good catch!

[@radhakannan2075]

I believe visual learning is one of the best methods to understand concepts and thank you so much for investing time and developing stuff for this 2 part block-chain video series!

[@diamondwinters5793]

Man free information thank you. I wish other people were like you Sir. Every one else wants something in exchange for knowledge thank you.

[@thespanishcatschool]

Thank you so much for both these videos. This is the first time I've really been able to get my head around how block chain technology works :)

[@elhananben8341]

Wow! Finally someone really explain and exemplify blockchain. Please make a lot of videos!!

[@books2speech950]

Hi Anders, what great explanation. I will recommend everyone to get started with this video before reading anything.

[@binhan6432]

Thank you so much Anders, you make me a total outsider sees hopes in learning and understanding blockchain. and get into the industry!

[@vineetahuja1970]

spent lot of time understanding block chain but your video was the best, wish I had seen this first. thank you

[@mdmeren]

One of the most satisfying and best explanation videos. Thank you.

[@YouTubist666]

I may have left a comment before, but this (and part one of this series) is excellently and clearly explained. Thanks!

[@tlcd8374]

This is the best video series have seen on this subject.

[@15minfit]

Thank you for your explanation of a blockchain. You are a fantastic communicator and I very much appreciate your efforts in sharing this knowledge! Thank you!

[@vittalshenoy]

Thank you for crystal clear explanation. Nowhere will you find such detailed yet comprehend-able video...

[@jdelar50]

Big THANK YOU for your time invested in sharing knowledge. Your clarity is amazing.

[@anders94]

A humble thanks - much appreciated!

[@delmike2633]

*Text Cloudbase7 on Instagram. To get your private key.*

[@cubano1979]

Thanks god for people like you with the patience to teach. Most people knowledgeable in this subject have no idea how to explain it

[@user-wy8qk1hl8y]

Wow, this is the best explanation I've watched on KZbin...Thank you!

[@erpu20]

Amazing explanation Anders. Your videos explained the crypto section of a blockchain very well. Thanks.

[@atulkumthekar1666]

I have never seen such an elegant simple and MEANINGFUL demo anywhere. Everyone just talks big, and confuses more! Thanks a ton.

[@kamaleshbhowmik7103]

Best Blockchain explanation (Part-2) I've ever seen, thanks for this great video tutorial

[@musabkara1684]

happy to see you are back

[@EverydayRoadster]

Best tutorial on blockchain I've seen so far. Thanks a lot.

[@ToddVance]

Such a fantastic explanation! The internal signature piece has been alluding me for weeks... Thank you!!!

[@FranklinHarding]

These two videos are so amazing. TYSM for taking the time to make them.

[@abartonkc]

Thank you, this is an excellent nuts and bolts description of a blockchain and how it provides security through signatures.

[@aymanalansari4696]

Your demos are AWESOME! I'm hungry for more! Please don't keep us hanging :')

[@krishnakrishnaswamy5773]

Arguably, the best video I have come across that explains blockchain using simple language. The 2 part introduction could be a course by itself and many would be willing to pay $$ for it.

[@vjsharma25]

Great explanation Andres!! Even after reading lot of material , seeing this video made my understanding crystal clear!!

[@kremlinology]

Agree with previous, amazing clarity. You break it down beautifully. Thank you so much!

[@pankajkedia6550]

Thank you very much Anders. This is the best video to understand Blockchain.

[@MyDearKyoKun]

Where has this been my whole semester..? Thank you!

[@vamshilove69]

Super awesome and super simple explanation of a seemingly complex topic.. thank you very much for this. Appreciate it.

[@jb121993]

Again, a very well orchestrated explanation! Very much like part 1.

[@kjwenterprises]

Again, masterful presentation and demo!!!! So glad I found you...

[@aion2177]

Saved me 3 days of research. So perfectly explained is crazy. Thank you very very much 🤗😁

[@zummotv1013]

can you please explain the verification part?3:36

[@Mr25thfret]

@@zummotv1013 magic...

[@momoynihan]

Finally a part 2:) Many thanks for the great explanations in both the first and second videos.

[@outofbounds9479]

best stuff on blockchain i have seen till now

[@darpandand]

Both part 1 and 2 are clear with simple examples. Thank you Anders

[@chenzur4285]

Andres, I've been dealing with Blockchain technology for quite a while now... your explanation is simple, elegant and clear! thank you very much!

[@tjambu]

The best and easiest How Blockchain / coinbase chain works. Simple, elegant and relevant. Thank you

[@luzazn]

Thank you for your explanation it was very clear ! Your clarity is amazing and I can tell that you are helping me with memoire that I writing about Blockchain !

[@onkliros]

Nice explanation of the key concepts around cryptocurrency, including digital signing of transactions, hashing of blocks and linking blocks into blockchains. Thanks!

[@haiamabdelbaset6678]

So perfect work. interesting, simple and specific explanation you are a brilliant . thanks for sharing this and I hope if there are still more details it will be a pleasure to hear you in a third video.

[@anders94]

I have had to turn comments off on my blockchain videos due to spam. If you want to reach out to me, please find me on twitter @anders94 instead. Most of the recent comments (which I've been judiciously deleting these past few years) have been people pushing an "I can get your private keys back for you" scam which, as everyone who has watched these videos knows. is quite impossible. I hate to take such a drastic measure but I'm afraid I just don't have the time.

[@JanHof]

Really clear explanation. Made me understand the blockchain a lot better. Thanks for making these 2 videos

[@bazilian0]

Brilliant visual explanation. Many thanks for the video and the demo files. This is a great way to explain things to noobs.

[@franciscoseyler]

Very clear step by step explanation. Thanks for making and sharing!

[@anupambera1068]

Thanks a lot for the brief explanation but it clears the gamut of unknown & unseen concept that's rising fast. Obliged to see more from your end.

[@JerRose5]

Thank you for creating this. It's a very clear and concise explanation.

[@RahulMeena-bd3ux]

Thanks Anders your explanation is the best as far as I have seen.

[@banuprataptanguturi9218]

Awesome and very simplified explanation .Both part 1 and 2 gave me a very good clarity .

[@woobear01]

Ditto what Charles Blubaugh wrote. Best video on the subject I've seen to date. Kudos

[@gk2011]

Just wanted to say thank you for this great explanation of this, my group in collage is working on a Block chain project for school and this really helped me explain how it work to them.

[@anders94]

Glad it was helpful - thanks for the comment.

[@RealityIsNot]

This is so crystal clear! Please keep posting

[@sandeepvlogs5253]

You made blockchain explanation so simple. Great Video

[@digredeth]

Perfect. Your explanation about blockchain was exceptionaly clear. Thank you so much.

[@RTorresmx]

The best explanation. Thanks

[@rahuln509]

This is by far the best explanation.

[@cunhacas]

Thank you Andres for this amazing explanation...

[@ShineVi]

Very interesting and easiest explanation about how works blockchain. Thank you!

[@vishalpoddar]

thankyou Andrew, it helped me understand blockchain more clearly.

[@EarthaKiddmore]

This is incredibly clear. Thank you!

[@ToroMoto]

Clear and concise. Thank you for making this content.

[@sejobas]

Very well done, thanks for this comprehensive explanation

[@dimkov]

WOW! More 1400 vs 6! Excellent result!

[@snwalthour]

Exceptionally clear explanation, thank you!

[@krbkll]

Most Clear explanation ever !!. keep posting please

[@grahamlambert4742]

Great explanation, very well put, very informative. Saved me considerable time.

[@JungranPaintingKim]

Very easy to understand the logic behind blockchain and its security mechanism! Thanks for the efforts~!

[@yanni0426]

Thanks very much for this. The best explanation of blockchain ever!

[@tanmoybasak7100]

Amazingly simple and clear representation.. grateful

[@jeremy8718]

A very nice explanation of PKI. Not an easy concept to cover, but you did it great. Keep up the great work.

[@nyceyes]

This was super well done. Bravo!

[@RahulSharma27]

Never really write comments. But this video really cleared my understanding of Blockchain. Thanks professor

[@Tiptop9278]

These videos are great! Thank you so much for doing them!

[@vl3906]

Beyond amazing explanation, thanks so much!

[@saoudsalah1850]

Great explanation. Makes it so simple to understand

[@asbjrngyring108]

Awesome and straightforward explanation. You've gained a new subscriber :)

[@TijoAntony22]

You are amazing Anders! Way to go!

[@balakumaranvenkataraman6358]

Excellent explanation...well structured to make it easy to understand..thanks for this

[@mahzadart]

WOW! I will watch and learn anything you teach even if it is plumbing!

[@pashaborisov1111]

Great explanations in both parts i and ii. thank you!

[@access786]

Very clear, you are gifted, Anders!

[@hezekiahtee4900]

For your instant private key generating in few hours contact robert_m33 @ Instagram.. He helped me

[@geraldopereira1972]

Excelentes vídeos e ótima esplanação ! Muito obrigado Anders por compartilhar !

[@pranjalmahajan5]

thank you. only this video could explain me the concept neatly

[@skumarnutube]

Anders, thanks for taking efforts to build a demo to explain the concept instead of slides, animations etc. This is really amazing! You are my Blockchain Guru ! I am keen to learn more like BFT, Consensus, Merkle tree etc in a practical way. I seem to have mined your video from the internet universe....it feels like mining a cryptocurrency :-)

[@anders94]

Ha! Thanks, FWIW I'm working on a smart contracts explainer now.

[@oleanrobin]

Wow. such a great explanation. Excellent work. Thank you so much!!

[@zummotv1013]

can you please explain the verification part?3:36

[@arrayanes520]

Thank you, I finally understood the operation of the blockchain