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Blockchain : émergence d’une nouvelle forme de confiance numérique
La SIF a organisé une journée sur les Blockchains le 15 novembre 2016, à Paris dans les locaux de Telecom ParisTech
PANEL SESSION #1: “Blockchain Overview – State of Technology and Market”
Moderator
Richard McCormack, Vice President of Marketing Strategy, Fujitsu America Inc.
Panelists
Alessandro Voto, Research Manager, Co-lead Blockchain Futures Lab, Institute for the Future
Ryan Singer, CEO, Blockchain Health
Tiana Lawrence, CMO, Factom
What is Blockchain Technology? A Step-by-Step Guide For Beginners
1 month ago
Topics: Blockchain 101
Is blockchain technology the new internet?
The blockchain is an undeniably ingenious invention – the brainchild of a person or group of people known by the pseudonym Satoshi Nakamoto.
By allowing digital information to be distributed but not copied, blockchains create the backbone of a new type of internet. Originally devised for the digital currency, Bitcoin, the tech community is now finding other potential uses for the technology.
Bitcoin has been called “digital gold”, and for good reason. To date, the total value of currency is close to $9 billion US. And blockchains can make other types of digital value. Like the internet (or your car), you don’t need to know how the blockchain works to use it. However, having a basic knowledge of this new technology shows why it’s considered revolutionary.
What is Blockchain Technology? A step-by-step guide than anyone can understand
“The blockchain is an incorruptible digital ledger of economic transactions that can be programmed to record not just financial transactions but virtually everything of value.”
Don & Alex Tapscott, authors Blockchain Revolution (2016)
A distributed database
Picture a spreadsheet that is duplicated thousands of times across a network of computers. Then imagine that this network is designed to regularly update this spreadsheet and you have a basic understanding of the blockchain.
Information held on a blockchain exists as a shared — and continually reconciled — database. This is a way of using the network that has obvious benefits. The blockchain database isn’t stored in any single location, meaning the records it keeps are truly public and easily verifiable. No centralized version of this information exists for a hacker to corrupt. Hosted by millions of computers simultaneously, its data is accessible to anyone on the internet.
To go in deeper with the google spreadsheet analogy I would like you to read this piece from a blockchain specialist.
What is Blockchain Technology? A step-by-step guide than anyone can understand
Blockchain as Google Docs
“The traditional way of sharing documents with collaboration is to send a Microsoft Word document to another recipient, and ask them to make revisions to it. The problem with that scenario is that you need to wait until receiving a return copy before you can see or make other changes, because you are locked out of editing it until the other person is done with it. That’s how databases work today. Two owners can’t be messing with the same record at once.That’s how banks maintain money balances and transfers; they briefly lock access (or decrease the balance) while they make a transfer, then update the other side, then re-open access (or update again).
With Google Docs (or Google Sheets), both parties have access to the same document at the same time, and the single version of that document is always visible to both of them. It is like a shared ledger, but it is a shared document. The distributed part comes into play when sharing involves a number of people.
Imagine the number of legal documents that should be used that way. Instead of passing them to each other, losing track of versions, and not being in sync with the other version, why can’t *all* business documents become shared instead of transferred back and forth? So many types of legal contracts would be ideal for that kind of workflow.
You don’t need a blockchain to share documents, but the shared documents analogy is a powerful one.”
William Mougayar, Venture advisor, 4x entrepreneur, marketer, strategist and
blockchain specialist
What is Blockchain Technology? A step-by-step guide than anyone can understand
Durability and robustness
Blockchain technology is like the internet in that it has a built-in robustness. By storing blocks of information that are identical across its network, the blockchain cannot:
Be controlled by any single entity.
Has no single point of failure.
Bitcoin was invented in 2008. Since that time, the Bitcoin blockchain has operated without significant disruption. (To date, any of problems associated with Bitcoin have been due to hacking or mismanagement. In other words, these problems come from bad intention and human error, not flaws in the underlying concepts.)
The internet itself has proven to be durable for almost 30 years. It’s a track record that bodes well for blockchain technology as it continues to be developed.
Transparent and incorruptible
The blockchain network lives in a state of consensus, one that automatically checks in with itself every ten minutes. A kind of self-auditing ecosystem of digital value, the network reconciles every transaction that happens in ten minute intervals. Each group of these transactions is referred to as a “block”. Two important properties result from this:
Transparency
data is embedded within network as a whole, by definition it is public.
It cannot be corrupted
altering any unit of information on the blockchain would mean using a huge amount of computing power to override the entire network.
In theory, this could be possible. In practice, it’s unlikely to happen. Taking control of the system to capture Bitcoins, for instance, would also have the effect of destroying their value.
blockgeeks.com/guides/what-is-blockchain-technology-a-ste...
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12 September 2019 - OECD Global Blockchain Policy Forum.
Angel Gurría, Secretary-General of the OECD with Bruno Le Maire, Minister of Finance of France.
Photo: OECD/Hervé Cortinat
OECD, Paris, France.
Blockchain : émergence d’une nouvelle forme de confiance numérique
La SIF a organisé une journée sur les Blockchains le 15 novembre 2016, à Paris dans les locaux de Telecom ParisTech
Blockchain is a decentralised database or digital ledger of cryptocurrency or digital currency. It uses cryptography to keep secure payment transactions. It is public means everyone can see who present in the network. It is a chain of computers that must all approve an exchange before it can be verified and recorded. Explore us on :: xenixcoin.com/blockchain
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Learn Latest Blockchain Technology Trends with this Infographic
The term ‘blockchain’ was all the rage when Bitcoin was first introduced, and while Bitcoin may have lost some of its popularity and its value – Blockchain Technology continues to be a popular form of data storage and sharing.
blog.eduonix.com/infographics/blockchain-technology-infog...
Blockchain Tech panel from the State Of Digital Money 2015 #SODM15
(left to right):
Alex Rozman, Senior Manager in the Deloitte Transactions and Business Analytics LLP
Craig Sellars, Co-Founder and CTO for Tether
Eric Benz, Vice President of Payments at BitReserve
Judd Bagley, Director of Communications at Overstock.com
Alyse Killeen, Associate Venture Capital Investor at March Capital Partners
Participants speaking during the Session "Global Blockchain Council" at the World Economic Forum, Annual Meeting of the Global Future Councils 2019. Copyright by World Economic Forum / Benedikt von Loebell
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