0:00 intro 1:47 cryptographic hash functions 20:28 hash pointers and data structures 29:23 digital signatures 39:03 public keys as identities 44:32 a simple cryptocurrency
More Qeustions: @23:48 - How is the data from in a tamper-evident log stored? In a key value store? Since you are not using pointers to memory you need an auxilary store right? - Does the prev H(arrow) include the prev pointer AND the data or just the data? It would make more sense to include both right?
13:45 So commit(msg) returns (com, key), where in reality this is equal to (H(key|msg), H(key)). Does this mean that the key which is to be published is actually equal to H(key)? In that case, how could it possibly be that the verification method which uses the published key(aka H(key)) could ever succeed, since it will always be doing: verify(com, H(key), msg):=H(H(key)|msg)==com bearing in mind that com=H(key|msg).
Qestions: 14:00: "...returning as commitment: is it "hash(key) + Message" *or* "hash(key+message)"? 14:15: When the key+message was given to the verifier so he could hash it for comparsion? Great lecture!
Typing out my questions as I make my way through the video... I'll probably be posting multiple times... - When discussing the commitment API around the @14:28 mark, why do hash the 256 bit key? H(key) - Is it because we do "H(key | msg)" and theres some sort of communitive property? - Is "binding" essentially the same as saying the hash function is collision-free (impossible to find collisions)
For cryptocurrency mining and how to make good wages on your invested funds contact me (isaacken70@gmail.com ) and I'll show you how i made over $500k in 3 months and the secrets behind it.
Slide Commitment API: What's the purpose of the key? The only thing you publish at beginning is commitment. Message is kept secret until opening envelope. So you can easily do only com=h(msg) and publish com. Nobody can reveal msg from com. Message originator can't forge original message because he can't find msg' with the same hash h(msg)=h(msg'). Everything works without the key as well. All you need is clear hash.
Arrow pointers under heading of 'Blockchain' and 'Detecting Tempering' should point to previous/parent block H( ). It correctly mentions previous H( ) though arrow pointer shows next H( ). Both Bitcoin and Ethereum Block Header stores parent H( ) which is previous H( ). Please correct this.
at 7:16 he says "that if we know X and Y have the same hash, then it's safe to assume that X and Y are different" Did he mean to say that they are the same? The formula above shows "If we know H(x)=H(y), it's safe to assume that x=y"
yes H(x)=H(y) it is safe to assume x=y but it is rare situations where H(x)=H(Y) where x!=y it means it is difficult to find where Hash values are same with different X and Y. I think this is the concept he explained. If I make any mistake please correct me .
I have a thought about the identity in Privacy. When analyzing the behavior of an address to find out who that is, isn't it a good idea to use Machine Learning to run through the layers and to update the output over time? The activity of the address can be the input layer, the probability that that is Joe would be the output layer.
I can recommend Mr William charle he is a good broker and also expert in crypto currency he can help you get More informations and knowledge about Bitcoin He's available on what's app *+1 8 1 8 7 2 2 9 1 4 5*
I would like feedback on this concept Imagine a hash being generated by number string occurring only once in space+time would that not eliminate any "collisions?"
Is signature the way to prove , that someone is holding certain private key? Other words do we have another API for signature saying: isTheSameSK(pk,sig1,sig2)? This is like asking: is sig1 and sig2 made by the same person ? Or i can send a msg2 to this person and ask to sign it and later verify he also signed msg1?
Are these lectures the same ones being used for Coursera's Cryptocurrency course? I'd just sign up for the course but I hear the assignments on this specific course are pretty frustrating.
7:42 Dude says for a collision free hash function H, when H(x) = H(y), x does not equal y. This is false. For a collision free hash function H, when H(x) = H(y), x = y. Also this "collision free" function is called an injective function if you want to learn more about it.
I noticed that too. So I'm assuming he meant to say if H(x) = H(y) and the hash function is collision free, then it's safe to say x = y. Or did I miss understand?
@24min: re tampering: i undertand that tampering is not possible in th middle of the block chain but what if the tampering occurs at the very end of the chain (at the most recent "link"). would that not be possible?
Great work .Would like to request Blockchain sync that covers and the technical background for Peer to peer network. Covering Topics like 1. Bitcoin Peer Discovery 2. Inital Block Download 3. HeaderFirst Block Downloads. 4. Orphan Blocks and 5. Alerts Mis behvaing nodes. These are all topics that have been added to bitcoin documentation on bitcoin.org/en/developer-guide#orphan-blocks and are closely related to Stanford lecture for 4 Gen Peer-to-Peer Technology.
I love the grounded reality of this channel, its normal to see so many investors panic amid a worsening bearish market but it is also important to note that the market situation is nothing new in the crypto world. Several factors are driving negative sentiment in the stock and crypto markets right now including inflation, a shaky stock market, rising interest rates, and recession fears. As a result, BTC has dropped significantly from its all-time high, breaking below several key technical levels. As a crypto investor, the current situation might seem bleak. However, there are several tried and tested expert suggested investment strategies that can help you accumulate the current crypto storm, in few weeks of implementing trade with accurate signals directly from Theo Ryan, I have been able to accumulate over 19.5 btc despite the current state of the market.
@@newnew80793 Thanks for sharing his telegram details, this gave me a small amount of hope thanks, i’ll surely reach out to him and start learning the right way, tired of loosing from price drops,
I normally don’t do this, but coming across Theo Ryan in this channel, I just have to say something. He is indeed a tutor, he guided me even when I was being naive to the basics of trading. Thanks to Theo Ryan today I have made reasonable amount of crypto stack up and a good trading capital.
Heeelp! Every time I try to purchase ETH my CC Visa says Cionbase it's a company in Great Britain, and it blocks the purchase. Is coinbase out of GB I thought it was in Ca. Are the Visa bankers trying to discourage folks from buying?
The IRS recently released new guidance about virtual currency-the first in 5 years-which mainly dealt with whether taxpayers have gross income from two cryptocurrency events: hard forks of cryptocurrency the taxpayer owns and an airdrop of a new cryptocurrency following a hard fork, if the taxpayer receives units of new cryptocurrency. If you own virtual currency, no matter whether these terms sound like a foreign language to you or you are familiar with them, you may need to account for these events on your tax return for the year when they occur. As a crypto investor, you face significant risks regarding taxation and the IRS. These risks can be mitigated, however, with help. Most accountants have no clue. Lance Wallach receives hundreds of calls for help. Google him and your advisor. Who do YOU trust?
0:00 intro
1:47 cryptographic hash functions
20:28 hash pointers and data structures
29:23 digital signatures
39:03 public keys as identities
44:32 a simple cryptocurrency
Fantastic ! This really exceeded my expectations. I'm very glad I signed up for this and I am really looking forward to future lectures. Thanks !
Your speaking is very clear. Great lecture!
Did you ever buy bitcoin?
Fantastic! I really enjoyed the whole lecture. It was very concise, clear and engaging.
Really amazing lecture.
Thanks for decentralising the knowledge.
Thank you,
Sir, for the accessible lecture.
a very well delivered and thorough introduction to the foundations of cyber-currencies. Great work!
Hello
More Qeustions:
@23:48
- How is the data from in a tamper-evident log stored? In a key value store? Since you are not using pointers to memory you need an auxilary store right?
- Does the prev H(arrow) include the prev pointer AND the data or just the data? It would make more sense to include both right?
whoa super detailed may need to see this a few times
Awesome. builds from ground up and provides great understanding. Thank you.
thank you for the course, you're a great teacher and communicator!
Hello sir
Great! So nice to see some real heavy hitting in this space! Thanks.
$1 *****
I miss the time we could ChangeTip, but I'm sure it will be back again stronger and better.
The average fees for a Bitcoin transaction are over $1 right now because of the inane blocksize debate. It is becoming useless for microtransactions.
Let me hug some coins (っ◔◡◔)っ!
19HKMEVXViRMdMj318x5VqTPzJ1ipEBLSK
ua-cam.com/video/fOMVZXLjKYo/v-deo.html
CRI did
13:45 So commit(msg) returns (com, key), where in reality this is equal to (H(key|msg), H(key)). Does this mean that the key which is to be published is actually equal to H(key)? In that case, how could it possibly be that the verification method which uses the published key(aka H(key)) could ever succeed, since it will always be doing: verify(com, H(key), msg):=H(H(key)|msg)==com bearing in mind that com=H(key|msg).
Qestions:
14:00: "...returning as commitment: is it "hash(key) + Message" *or* "hash(key+message)"?
14:15: When the key+message was given to the verifier so he could hash it for comparsion?
Great lecture!
These are all entirely new concepts for me. It's difficult to grasp and make notes together at this pace!
Excellent lecture covering the key concepts very concisely
appreciable teaching. done a really great job @profs
Slide: Commitment API. The line commit(msg) := (H(key|msg), H(key)) probably needs to read commit(msg) := (H(key|msg), key).
Yep, that's a mistake.
Good catch.
can you just briefly explain the difference?
This was a Master Class! Thanks, From Eric Croom Jr,
Very beautifully explained, thanks!
Amazing Lecture prof!
Excellent! thank you very much for sharing your knowledge
Great Lecture!
34:43 Where exactly you draw the line that separates plausible numbers and non-plausible numbers?
Great intro to bitcoin. Thank you for posting this.
Typing out my questions as I make my way through the video... I'll probably be posting multiple times...
- When discussing the commitment API around the @14:28 mark, why do hash the 256 bit key? H(key)
- Is it because we do "H(key | msg)" and theres some sort of communitive property?
- Is "binding" essentially the same as saying the hash function is collision-free (impossible to find collisions)
16:08 "Let me just go through it "Bit-by-bit"" lol
thank you. Excellent start!
Great lecture!
Good stuff, much appreciated!
great lecture very well explained thanks.....
Excellent lecture. Very very good stuff
For cryptocurrency mining and how to make good wages on your invested funds contact me (isaacken70@gmail.com ) and I'll show you how i made over $500k in 3 months and the secrets behind it.
THANK SIR, GOD BLESS AMERICA AND GREECE-ROMAN.
Slide Commitment API: What's the purpose of the key? The only thing you publish at beginning is commitment. Message is kept secret until opening envelope. So you can easily do only com=h(msg) and publish com. Nobody can reveal msg from com. Message originator can't forge original message because he can't find msg' with the same hash h(msg)=h(msg'). Everything works without the key as well. All you need is clear hash.
22:27 why we are not calling it next pointer instead of prev??
I lost it on the meteor HAHAHAHAHAHAHAHA
A good blog to begin with cryptos and blockchain
i-am-in-crypto.blogspot.com/2020/07/coming-soon.html
Arrow pointers under heading of 'Blockchain' and 'Detecting Tempering' should point to previous/parent block H( ). It correctly mentions previous H( ) though arrow pointer shows next H( ). Both Bitcoin and Ethereum Block Header stores parent H( ) which is previous H( ). Please correct this.
at 7:16 he says "that if we know X and Y have the same hash, then it's safe to assume that X and Y are different"
Did he mean to say that they are the same?
The formula above shows "If we know H(x)=H(y), it's safe to assume that x=y"
yeah he meant that they are the same.
yes H(x)=H(y) it is safe to assume x=y but it is rare situations where H(x)=H(Y) where x!=y it means it is difficult to find where Hash values are same with different X and Y. I think this is the concept he explained. If I make any mistake please correct me .
at 23:10 are the blocks going from left to right or right to left ?
This is where 99% of the people in this world don't understand how bitcoin actually works. They only know the bitcoin price news....
789overdrive And it's those people that will ruin bitcoin's potential future and just turn it into another financial bubble.
Thank you for providing the world with this infinitely valuable and accessible resource! 100000 satoshis *****
Love it!!!! nice explanations
At 7 mins 24 seconds, I believe speaker meant: "If hash values are same, then X and Y have to be equal".
Agreed. Adding timestamp link: 7:18
I have a thought about the identity in Privacy. When analyzing the behavior of an address to find out who that is, isn't it a good idea to use Machine Learning to run through the layers and to update the output over time? The activity of the address can be the input layer, the probability that that is Joe would be the output layer.
BRILLIANT
Thank you so much for doing these.
what exactly is the commitment API ? is this kind of api an application programming interface ?
I can recommend Mr William charle he is a good broker and also expert in crypto currency he can help you get More informations and knowledge about Bitcoin
He's available on what's app
*+1 8 1 8 7 2 2 9 1 4 5*
Thanks for sharing!
He looks like Tim Cook.
On a bad day
I would like feedback on this concept
Imagine a hash being generated by number string occurring only once in space+time would that not eliminate any "collisions?"
Sir will u please post the week 1 assingment answer file
What's the difference between the commitment and signature API's?
Ah, this is like being back in Uni. Reminds me of my Computer Engineering and Electronics days.
What is the point of Powerpoint if you just put the words you are speaking into it?
This is actually a bitcoin course that I can understand. I'm waiting for episode 2, when will it be uploaded?
2:47
Time for a 4th rewatch?
Yes.
Is signature the way to prove , that someone is holding certain private key? Other words do we have another API for signature saying: isTheSameSK(pk,sig1,sig2)? This is like asking: is sig1 and sig2 made by the same person ? Or i can send a msg2 to this person and ask to sign it and later verify he also signed msg1?
If last block data is tempered, how will it hamper the previous blocks?
Ummmm, cryptographic vegetables, tasty :D
I heard that educational token(LEDU coin) is currently paying project creators for their work, any thought on it
Ho boy that's how you know they're real academics ... 3 minutes in and it's an college senior-level algorithms lecture
34:31
Are these videos available somewhere for legal download or are they only on youTube?
Are these lectures the same ones being used for Coursera's Cryptocurrency course? I'd just sign up for the course but I hear the assignments on this specific course are pretty frustrating.
anyone knows: are all coins are immutable? thanks!
Nice ! Thanks
Can I get slides of lecture , please?
Illustrations are too abstract and lack practical examples or meaningful analogies. Stopped at 27:30.
Can anyone answer what software I would use to calculate these commands? Com, key, msg, etc? How can I implement what I am learning in this video?
Does anyone have answers to the quiz of this course ?
7:42 Dude says for a collision free hash function H, when H(x) = H(y), x does not equal y. This is false. For a collision free hash function H, when H(x) = H(y), x = y. Also this "collision free" function is called an injective function if you want to learn more about it.
Thats bijection not injection
I noticed that too. So I'm assuming he meant to say if H(x) = H(y) and the hash function is collision free, then it's safe to say x = y. Or did I miss understand?
@24min: re tampering: i undertand that tampering is not possible in th middle of the block chain but what if the tampering occurs at the very end of the chain (at the most recent "link").
would that not be possible?
Please, I want solution of exercises to chapter 1
HEllo, would it be possible to have the slides of this course?
Hello Sir
Great work .Would like to request Blockchain sync that covers and the technical background for Peer to peer network. Covering Topics like
1. Bitcoin Peer Discovery 2. Inital Block Download 3. HeaderFirst Block Downloads. 4. Orphan Blocks and 5. Alerts Mis behvaing nodes. These are all topics that have been added to bitcoin documentation on bitcoin.org/en/developer-guide#orphan-blocks and are closely related to Stanford lecture for 4 Gen Peer-to-Peer Technology.
"relies on hairy math" best quote
"Earth will be destroyed by giant meteor in next 2 seconds which... did not happen" :D great lecture
I want to learn it
Where can we get the lecture PPT?
Why complaints? this is "intro" yes
very good
perfect
A course for gentlemen
Surprised Disney has not requested a take-down of this video.
Thank you
What's the song used in these videos?
Yes whats the music! Great, great lectures. Thanks!
I love the grounded reality of this channel, its normal to see so many investors panic amid a worsening bearish market but it is also important to note that the market situation is nothing new in the crypto world. Several factors are driving negative sentiment in the stock and crypto markets right now including inflation, a shaky stock market, rising interest rates, and recession fears. As a result, BTC has dropped significantly from its all-time high, breaking below several key technical levels. As a crypto investor, the current situation might seem bleak. However, there are several tried and tested expert suggested investment strategies that can help you accumulate the current crypto storm, in few weeks of implementing trade with accurate signals directly from Theo Ryan, I have been able to accumulate over 19.5 btc despite the current state of the market.
Hello...I have been looking for such a profitable signals and guides from a pro trader for some time now how do i contact him?
@Theo917
That's👆his username / telegram
@@newnew80793 Thanks for sharing his telegram details, this gave me a small amount of hope thanks, i’ll surely reach out to him and start learning the right way, tired of loosing from price drops,
I'm also a subscriber of his signals, and if I were to rate their accuracy I would say 95%
I normally don’t do this, but coming across Theo Ryan in this channel, I just have to say something. He is indeed a tutor, he guided me even when I was being naive to the basics of trading. Thanks to Theo Ryan today I have made reasonable amount of crypto stack up and a good trading capital.
How rich would Satoshi be,if he mined 90% of the Bitcoin supply?
0:51
So... invest in GoofyCoin?
36:28
Tammm
l
I had to turn on the subtitles concat - a - what? concatenate... shoulda paid attention in math...
Heeelp! Every time I try to purchase ETH my CC Visa says Cionbase it's a company in Great Britain, and it blocks the purchase. Is coinbase out of GB I thought it was in Ca. Are the Visa bankers trying to discourage folks from buying?
vegetables are great...
Now I know crypto trading is gambling cause this bloke knows everything and he doesn't look rich.
The IRS recently released new guidance about virtual currency-the first in 5 years-which mainly dealt with whether taxpayers have gross income from two cryptocurrency events: hard forks of cryptocurrency the taxpayer owns and an airdrop of a new cryptocurrency following a hard fork, if the taxpayer receives units of new cryptocurrency. If you own virtual currency, no matter whether these terms sound like a foreign language to you or you are familiar with them, you may need to account for these events on your tax return for the year when they occur. As a crypto investor, you face significant risks regarding taxation and the IRS. These risks can be mitigated, however, with help. Most accountants have no clue. Lance Wallach receives hundreds of calls for help. Google him and your advisor. Who do YOU trust?
Crypto currency step 1: Buy 25 GTX 1080tis.