شرح بالعربي لخوارزمية دليل العمل وخوارزمية اثبات صحة الحصة وغيرها من خوارزميات الاجماع \ الاتفاق في تقنية البلوك تشين مع المقارنة بينهم.
بالإضافة لشرح مسألة \ مشكلة الجنرال البيزنطي في الأنظمة الموزعة، ما هي وكيف حلتها تقنية البلوكشين.

Proof-of-Work (PoW) and Proof-of-Stake (PoS) consensus algorithms fully explained with comparisons in Arabic.
As well as explaining the Byzantine Generals’ problem in distributed systems and how Blockchain technology solved it.
And other examples of Consensus algorithms (Proof of capacity, Proof of authority, proof of elapsed time).

This video is part of Blockchain 101 tutorial
هذا الشرح جزء من دورة البلوك تشين
https://www.youtube.com/playlist?list=PLd2pEan0ZG_ZQX25f5Z-1RFkHPz2QuLeY

Vitalik Buterin: Ethereum is a Decentralized Consensus Platform

Digital crypto-currencies such as Bitcoin are the singularity of money and, after spending some time educating myself, I have turned from a skeptic into a fan. If you are not familiar with the topic then I suggest that you start with my interview with Andreas Antonopoulos. In that conversation we lay down the basics and discuss why “Bitcoin is not currency; it’s the internet of money!”

If you are already intellectually comfortable with Bitcoin, then it is time to talk about Bitcoin 2.0 and the best candidate so far is Ethereum. Ethereum is the brain-child of Vitalik Buterin who wrote most of the original code and had such a compelling vision that he managed to attract a large team of coders, cryptography experts, investors and supporters – all with the goal of making it a reality. And so I was extremely happy to interview Buterin for my Singularity 1 on 1 podcast.

During our 70 min conversation with Vitalik we cover a variety of topics such as: what is Ethereum and how is it different from Bitcoin; Vitalik’s motivation and biggest dream; why and how Ethereum was designed to be Turing complete; the differences between Ethereum and Ether; the idea of creating a decentralized app ecosystem; egalitarianism and the Gini index; the size and security of the Ethereum database; the excange rate and sale of Ether coins…

I owe a special debt of gratitude to Jan Miranda and Tamara Haasen without whom this interview would not have happened!

(If you want to help me produce more high-quality episodes like this one you can send bitcoin 1gnjsmU3TzWF1LXNFrm3egYYuh3ZJrJ7F)

The 2nd episode, “Scars of Consensus” shines a light on stuff that happened after the consolidation of Bitcoin… and the dispersion of part of its community into a series of different initiatives. In particular, we focus on Ethereum, and the adventures it’s been through since its birth.

Role: Art Direction

Consensus is the annual gathering of the cryptocurrency and blockchain technology world. Since 2015, Consensus has attracted every major company, developer, founder and investor in the cryptocurrency and blockchain world to engage in an annual discussion about the future of the industry. Consensus is designed to be a big tent for the industry: it convenes industry participants ranging from enterprise consortia to cypher punks. This convening power breaks down the barriers that separate companies in the industry and allows everyone working on the technology to spend three days learning from their peers. Previous speakers reflect the richness and diversity of the Consensus crowd, ranging from titans of Wall Street and rulers of the Fortune 500, to pioneering cryptographers and the core developers who power the world’s most valuable cryptocurrencies.

These include names like: • FedEx’s Fred Smith • Fidelity’s Abigail Johnson • Square’s Jack Dorsey • Chairman of the US Securities Exchange Commission, Jay Clayton • Whitfiled Diffie, co-creator of public-key cryptography • David Chaum, investor of the first digital cash …And many more

Find more about Consensus and Coindesk?

Events

Unlock business value with IBM Blockchain Platform’s Multicloud capabilities. With blockchain software, services, tools and sample code, the IBM Blockchain Platform includes everything you need to create, test, govern and manage a working blockchain network, accelerating the creation of blockchain applications in a variety of cloud environments. Learn about the new, Kubernetes-based architecture for deployment flexibility, updated developer tools, and centralized user interface to deploy and manage components.

How many ether whales are out there? How do their trades affect market volatility, and more to the point, the price of ether? What are their relationships with major exchanges? Blockchain forensics firm Chainlaysis will present new research on the topic.

Cryptocurrency Market Update May 19th 2019 – Bulls Follow Consensus
In this week’s cryptocurrency market update we look at all the latest news headlines for Bitcoin, Ethereum, Binance, Bitfinex, Stock markets & more. Bitcoin & Altcoin charts all ended this week higher after the bulls showed up again in style. Stock markets were weak on fears the China trade wars hit home.
#Bitcoin #Ethereum #Cryptocurrency

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Disclaimer: I AM NOT A LICENSED FINANCIAL ADVISOR. MY VIEWS ARE GENERAL IN NATURE AND SHOULD NOT BE TAKEN AS FINANCIAL ADVICE. ALWAYS DO YOUR OWN RESEARCH BEFORE INVESTING ANY MONEY.

Does the blockchain make traditional consensus algorithms such as Paxos, Raft, and PBFT (practical byzantine fault tolerance) obsolete? Can we just all forget about consensus, and be happy with the blockchain?

This is the first in a series of four videos describing how the blockchain works to achieve distributed consensus, and comparing it to the competition.

For an introduction to crypocurrency (which this video is not), go check out this excellent video on 3blue1brown: https://www.youtube.com/watch?v=bBC-nXj3Ng4

This is a lecture from the Distributed Systems class. See www.distributedsystemscourse.com for more information.

Sean Rodriguez, Senior Vice President, Faster Payments Strategy Leader, Federal Reserve System, summarises the US faster payments landscape, and what needs to be done to create a united faster payments solution.

For all your fintech-related news, please visit https://www.finextra.com.