What is Segregated Witness (SegWit)? How do you know you’re using SegWit? SegWit fixes transaction malleability and enables further upgrades towards Bitcoin smart contracts. Can transaction malleability lead to denial-of-service (DoS) attacks? Does SegWit put witness data in a different block? Did SegWit change transaction validation? versus? Are there any security risks of invalid blocks?
CORRECTION: At ~2:07, I stated the incorrect BIP number for the Bech32 address format, which should be BIP173. BIP176 is about "bits" denomination.
https://github.com/bitcoin/bips/blob/master/bip-0173.mediawikiMore on SegWit:
https://bitcoincore.org/en/2016/01/26/segwit-benefits/Chapters
0:00 What is Segregated Witness (SegWit)?
3:06 How would you know that you are using Segregated Witness?
5:20 What type of malleability and scalability issues can Bitcoin present without using Segregated Witness?
7:17 Why is nobody exploiting the malleability bug in Bitcoin or Bitcoin Cash, if you can interject a change with the signatures, pay a higher fee, and broadcast it again?
8:22 If we are making two different blocks, a transaction and witness block, are they still the same size?
9:28 How is the witness part included in add-on blocks and verified in the coinbase transaction?
10:53 SegWit security. Are there any concerns about the potential increase in the number of invalid blocks propagated, if not enough people are storing the unhashed signature data on their nodes?
11:59 If I don't store signature data on my node, could I not verify previous transactions? If that is the case, should large transactions remain off SegWit or the Lightning Network, insofar as you not personally storing signature data?
These questions are from the MOOC 9.3 and 9.5 sessions which took place on March 2nd and March 16th, 2018 respectively. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles.
If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron:
https://www.patreon.com/aantonopRELATED:
The Lightning Network -
https://www.youtube.com/playlist?list=PLPQwGV1aLnTurL4wU_y3jOhBi9rrpsYyiSegWit adoption -
https://youtu.be/KCsTVTRk6I4Advanced Bitcoin Scripting Part 1: Transactions and Multi-sig -
https://youtu.be/8FeAXjkmDcQAdvanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware -
https://youtu.be/pQbeBduVQ4IHow do I choose a wallet? -
https://youtu.be/tN6b62sEpsYHot vs. cold wallets -
https://youtu.be/Aji_E9sw0AESegWit adoption -
https://youtu.be/KCsTVTRk6I4Secure, tiered storage system -
https://youtu.be/uYIVuZgN95MDecentralised exchanges and counterparty risk -
https://youtu.be/hi_jaw0dT9MDecentralised exchanges with fiat -
https://youtu.be/3Url8tbQEkAHow do I secure my bitcoin? -
https://youtu.be/vt-zXEsJ61UHow do mnemonic seeds work? -
https://youtu.be/wWCIQFNf_8gHODLing and the "get free" scheme -
https://youtu.be/MhOwmsW1YNIHow to get people to care about security -
https://youtu.be/Ji1lS9NMz1EBitcoin as everyday currency -
https://youtu.be/xYvvSV4mjH0Irreversibility and consumer protection -
https://youtu.be/R107YWu5XzUHyperbitcoinization -
https://youtu.be/AB5MU5fXKfoJob opportunities with cryptocurrencies -
https://youtu.be/89_p4pDlQtIHow long until mainstream adoption? -
https://youtu.be/y3cKBDBabtAWhat is the biggest adoption hurdle? -
https://youtu.be/jHgyHF3F2TIAndreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin.
Follow on Twitter: @aantonop
https://twitter.com/aantonopWebsite:
https://antonopoulos.com/He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters.
THE INTERNET OF MONEY, v1:
https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8[NEW] THE INTERNET OF MONEY, v2:
https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8MASTERING BITCOIN:
https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042[NEW] MASTERING BITCOIN, 2nd Edition:
https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388Subscribe to the channel to learn more about Bitcoin & open blockchains!
Music: "Unbounded" by Orfan (
https://www.facebook.com/Orfan/)
Outro Graphics: Phneep (
http://www.phneep.com/)
Outro Art: Rock Barcellos (
http://www.rockincomics.com.br/)
Join the aantonop Channel:
https://aantonop.io/joinaantonopytAbout the Site 🌐
This site provides links to random videos hosted at YouTube, with the emphasis on random. 🎥
Origins of the Idea 🌱
The original idea for this site stemmed from the need to benchmark the popularity of a video against the general population of YouTube videos. 🧠
Challenges Faced 🤔
Obtaining a large sample of videos was crucial for accurate ranking, but YouTube lacks a direct method to gather random video IDs.
Even searching for random strings on YouTube doesn't yield truly random results, complicating the process further. 🔍
Creating Truly Random Links 🛠️
The YouTube API offers additional functions enabling the discovery of more random videos. Through inventive techniques and a touch of space-time manipulation, we've achieved a process yielding nearly 100% random links to YouTube videos.
About YouTube 📺
YouTube, an American video-sharing website based in San Bruno, California, offers a diverse range of user-generated and corporate media content. 🌟
Content and Users 🎵
Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.
While most content is uploaded by individuals, media corporations like CBS and the BBC also contribute. Unregistered users can watch videos, while registered users enjoy additional privileges such as uploading unlimited videos and adding comments.
Monetization and Impact 🤑
YouTube and creators earn revenue through Google AdSense, with most videos free to view. Premium channels and subscription services like YouTube Music and YouTube Premium offer ad-free streaming.
As of February 2017, over 400 hours of content were uploaded to YouTube every minute, with the site ranking as the second-most popular globally. By May 2019, this figure exceeded 500 hours per minute. 📈
List of ours generators⚡
Random YouTube Videos Generator
Random Film and Animation Video Generator
Random Autos and Vehicles Video Generator
Random Music Video Generator
Random Pets and Animals Video Generator
Random Sports Video Generator
Random Travel and Events Video Generator
Random Gaming Video Generator
Random People and Blogs Video Generator
Random Comedy Video Generator
Random Entertainment Video Generator
Random News and Politics Video Generator
Random Howto and Style Video Generator
Random Education Video Generator
Random Science and Technology Video Generator
Random Nonprofits and Activism Video Generator