Blockchain kasinoalalla

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Blockchain Nedir?

Blockchain, en kısa ifadesiyle şifrelenmiş işlem takibi sağlayan dağıtık bir veri tabanıdır. Aracısız her kullanıcı ağa bağlanabilir, yeni işlemler gönderebilir, işlemleri doğrulayabilir ve yeni bloklar oluşturabilir. Her bir bilginin bloklar halinde, gelişmiş şifreleme algoritmalarıyla, birbirine bağlanarak kaydedildiği bu dağıtık veri tabanı, bizlere bir merkeze bağlı olmaksızın işlem yapabilme imkânı sağlıyor. Böylece işlemler direkt alıcı ile satıcı arasında güvenli bir şekilde gerçekleşiyor.

Tapscott Ceo’su ve “Blockchain Revolution” kitabının da yazarı Don Tapscott, bir cin gibi şişesinden kaçarak hayatımızın her alanına yerleşen teknolojinin ve tabi blockchain teknolojisinin, dünya ekonomisinde bir devrim yapma niteliğine sahip olduğuna vurgu yapıyor. Tapscott, “Bilgi mahremiyeti özgür bir toplumun temelidir,” sözleriyle, bu teknolojinin aynı zamanda benzersiz bir gizlilik koruması ve “gerçek güven için bir platform” sağlayacağına inanıyor.

Blockchain teknolojisi hangi alanlarda kullanılabilir?

Para birimleri aşırı şeffaf bir yapı sunar. Dünya üzerindeki toplam miktarı ve o anki ticari hacmi takip edebileceğimiz kadar şeffaftır. Gerçek anlamda eşler arası (peer to peer), işlemleri doğrulamak ve sonuçlandırmak için güçlü aracılara ihtiyacın olmadığı bir sistemdir. Teknoloji harikası bir kriptografiyle yaptığımız işlem sonucunda, elimizde gerçeğini kayıt alabilen bir veri tabanı varsa başka neleri kayıt alabileceğimizi bir düşünelim. Sadece kimin kime ödeme yaptığından ziyade yapısal her türlü bilgi kayıt altına alınabilir. Kimin kiminle evlendiğiden başlayarak, kimin hangi arazinin sahibi olduğuna kadar kayıt altına alınılabilir. Özellikle Edurne ve Mayel çiftinin blok zinciri üzerinden evlenmesi, dijitalleşmenin içselleştirilmesi ve blockchain üzerine yapılan konuşmalarda verilen en popüler örneklerden biri sayılabilir.

Tapscott’un blok zinciri teknolojisi ile ilgili verdiği örneklerden biri, özellikle teknolojiyle birlikte değişen ve dönüşen dünyada hukukun alanıyla ilgili de bizlere ipucu verir niteliktedir. Tapscott, bir endüstri düşünün diye başlıyor sözlerine. Blockchain sayesinde insanların ortaya çıkardıkları değerden kendilerine pay alabildikleri ve daha refah bir dünya oluşturarak o endüstri üzerinde yıkıcı bir etki yapma yolunda büyük potansiyele sahip olabilecekleri bir örnek anlatıyor bizlere. Mesela müzik endüstrisi, belki de blockchain, müzik platformu üzerinde müziğini yayınlayan bir sanatçı olarak diyeceğim ki “Müziğimi dinleyebilirsiniz, bedavadır. Filminizde mi kullanmak istiyorsunuz? Bu kadara mal olur ve bu şekilde çalışır. Filme koyarsanız akıllı kontrat bana ödeme yapar. Veya zil sesi olarak kullanmaya ne dersiniz? Onun akıllı kontratı da burada.”

Bankacılık sektörü için blockchain niçin önemlidir?

İşlemlerin karşılıklı iki taraf arasında gerçekleşmesi ve aracıya ihtiyaç duyulmaması blok zinciri teknolojisinin en önemli fırsatlarından biri olurken, aynı zamanda bu durum bankalar gibi geleneksel finans kurumları için de tehditkar bir nitelik taşıyor gibi görünse de, bankaların da önemli miktarlarda işlem ücreti ödediğini unutmamalıyız. Bu bağlamda blok zinciri teknolojisinin, bankaların da 2022 yılına kadar 20 milyar dolar civarında tasarruf sağlamasına imkân vereceği tahmin ediliyor. McKinsey gibi dünyanın en büyük danışmanlık firmaları ve birçok banka blockchain girişimleri başlatmaktadır. Aynı zamanda Google, IBM ve Microsoft gibi dev isimler de blockchain projelerini geliştirmektedir.

Blockchain ve refah

Bitcoin madenciliği ve ticaretinin en yoğun gerçekleştiği ülke olan Çin’de dijital para ve fintech konusunda pek çok adım atılıyor. Mevcut haliyle finansal teknolojilerin benimsenmesi açısından dünyada lider olarak öne çıkan Çin, yeni beş yıllık kalkınma planında blockchain gibi yeni nesil teknolojilere odaklanacağının sinyalini verdi. Hükümetin 13. Beş Yıllık Kalkınma Planı olarak duyurduğu ve 2020 yılları arasında atılacak adımların şekillendirildiği planda, Çin, bilgi ve iletişim teknolojilerinde yaşanan gelişmelerden faydalanarak ekonomik kalkınmayı hızlandırmayı ve refah seviyesini artırmayı hedefliyor.

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Blockchain ve teknolojisinin refah ile ilişiğini anlamak adına Don Tapscott’un Ted konuşmasını izlemek, yıkıcı ve bir o kadar da yapıcı etkisiyle geleceğin blockchain’ini daha iyi özümsememizi sağlayacaktır.

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Mengenal Apa itu Teknologi Blockchain

Blockchain adalah salah satu teknologi yang tidak menggunakan pihak ketiga dalam suatu proses pertukaran data yang dalam hal ini terjadi pada proses transaksi. Sederhananya, jika Anda membeli sesuatu di toko dengan membayar menggunakan kartu debit, maka pihak toko akan percaya saldo yang anda masukkan sudah masuk ke rekening milik mereka. Nah, pihak ketiga yang dimaksud disini adalah perusahaan Bank yang sebagai penghubung pembeli dan penjual tersebut dalam bertransaksi menggunakan kartu debit tadi.

Kira kira, apa yang terjadi jika bank mengalami gangguan pada layanan mereka? Tentunya hal ini membuat anda tidak bisa melakukan transaksi menggunakan bank. Hal ini terjadi saat ada permasalahan pada satelit yang digunakan oleh Bank BCA, hal ini menyebabkan beberapa transaksi atm tidak bisa bekerja dengan baik.

Sistem Blockchain tidak menggunakan pihak ketiga sebagai pusatnya, namun menggunkan banyak pihak atau komputer yang tersebar di jaringan itu sendiri. Hal ini akan membuat orang yang tidak bertanggung jawab menjadi kesulitan melakukan pembobolan pada sistem dan mempunyai gangguan yang kemungkinan kecil akan terjadi.

Bank mencatat semua transaksi financial yang mereka lakukan dalam suatu buku besar. Nah, yang membedakan adalah teknologi Blockchain ini tidak dikelola oleh satu ogranisasi aja, tapi oleh banyak yang disebarkan secara publik. Sehingga hal ini lah yang menjadi kekuatan utama dari Blockchain.

Teknologi Blockchain juga memberikan solusi untuk dapat mengurangi korupsi. Hal ini dikarenakan data transaksi akan langsung ketahuan dikarenakan pihak publik dapat melihat history transaksi secara realtime.

Di dunia sendiri, Bitcoin meruapakan salah satu yang menerapkan teknologi Blockchain dan cryptography. Kira-kira menurut kamu gimana perkembangan hal ini untuk di Indonesia. Tentunya, terkait hal transaksi yang perlu kamu ketahui adalah aturan dan regulasi terhadap financial technology yang ada di Indonesia. Startup Fintech yang menggunakan teknologi Blockchain harus punya Data center di Indonesia juga bukan ?

What is blockchain? The complete guide

The much-hyped distributed ledger technology (DLT) has the potential to eliminate huge amounts of record-keeping, save money, streamline supply chains and disrupt IT in ways not seen since the internet arrived.

Senior Reporter, Computerworld |

Blockchain, which began to emerge as a real-world tech option in 2020 and 2020, is poised to change IT in much the same way open-source software did a quarter century ago. And in the same way Linux took more than a decade to become a cornerstone in modern application development, Blockchain will likely take years to become a lower cost, more efficient way to share information and data between open and private business networks.

Based on a peer-to-peer (P2P) topology, blockchain is a distributed ledger technology (DLT) that allows data to be stored globally on thousands of servers – while letting anyone on the network see everyone else’s entries in near real-time. That makes it difficult for one user to gain control of, or game, the network.

However, in highly publicized incidents over the five years, blockchains have been hacked, typically through a cryptocurrency application such as bitcoin. Smaller blockchains with fewer nodes (or computers) have also been susceptible to fraud, with would-be thieves gaining control of the majority of nodes.

For businesses, however, blockchain holds the promise of transactional transparency – the ability to create secure, real-time communication networks with partners around the globe to support everything from supply chains to payment networks to real estate deals and healthcare data sharing.

Recent hype around this relatively new technology is real because DLT, in essense, represents a new paradigm for how information is shared; tech vendors and enterprises, not surprisingly have rushed to learn how they can use the distributed ledger technology (DLT) to save time and admin costs. Numerous companies have already rolled out, or are planning to launch, pilot programs and real-world projects across a variety of industries – everything from financial technology (FinTech) and healthcare to mobile payments and global shipping.

So while blockchain isn’t going to replace traditional corporate relational databases, it does open new doors for the movement and storage of transactional data inside and outside of global enterprises.

Driven mainly by financial technology (fintech) investments, blockchain has seen a fast uptick in adoption for application development and pilot tests in a number of industries and will generate more than $10.6 billion in revenue by 2023, according to a report from ABI Research. Most of that revenue figure is expected to come from software sales and services.

Blockchain adoption is expected be steady, as the changes it brings gain momentum, according Karim Lakhani, a principal investigator of the Crowd Innovation Lab and NASA Tournament Lab at the Harvard Institute for Quantitative Social Science. ”Conceptionally, this is TCP/IP applied to the world of business and transactions,” Lakhani said. ”In the ’70s and ’80s, TCP/IP was not imaginable to be as robust and scalable as it was. Now, we know that TCP/IP allows us all this modern functionality that we take for granted on the web.

”Blockchain has the same potential.”

A Gartner survey of CIOs last spring revealed only 1% had blockchain deployed in production environments; that number has grown to 3.3% today, according to Gartner Distinguished Analyst Avivah Litan.

Martha Bennett, a principal analyst for Forrester Research, noted any blockchain or ”DLT” project is a long-term strategic initiative, and disappointment is inevitable ”when the hoped-for miracles fail to materialize.

”It’s not realistic to expect a solid cost model or definitive benefits statement because it’s simply too early for that,” Bennett said. ”To assemble real evidence, we need to have a number of fully operationalized, scaled-out deployments running for at least a couple of years. And we’re simply not there yet.”

What is blockchain and how does it work?

First and foremost, blockchain is a public electronic ledger built around a P2P system that can be openly shared among disparate users to create an unchangeable record of transactions, each time-stamped and linked to the previous one. Every time a set of transactions is added, that data becomes another block in the chain (hence, the name).

Blockchain can only be updated by consensus between participants in the system, and once new data is entered it can never be erased. It is a write-once, append-many technology, making it a verifiable and auditable record of each and every transaction.

While it has great potential, blockchain technology development is still early days; CIOs and their business counterparts should expect setbacks in deploying the technology, including the real possibility of serious bugs in the software used atop blockchain. And as some companies have already discovered, it’s not the be-all solution to many tech problems.

Blockchain standards organizations, universities and start-ups have proposed newer consensus protocols and methods for spreading out the computational and data storage workload to enable greater transactional throughput and overall scalability – a persistent problem for blockchain. And the Linux Foundation’s Hyperledger Project has created modular tools for building out blockchain collaboration networks.

While some industry groups are working toward standardizing versions of blockchain software, there are also hundreds of startups working on their own versions of the distributed ledger technology.

Each digital record or transaction in the electronic ledger is called a block. When a block is completed, it creates a unique secure code that ties it to the next block.

Why has blockchain been getting so much buzz? In a word, bitcoin – the wildly hyped cryptocurrency that allows for payment transcations over an open network using encryption and without exposing the identities of individual bitcoin owners. It was the first ever decentralized one when it was created in 2009. Other forms of cryptocurrency or virtual money, such as Ether (based on the Ethereum blockchain application platform), have also gained significant traction and opened new venues for cross-border monetary exchanges. (Ethereum was introduced in 2020 by developer Vitalik Buterin, who was 19 at the time.)

The term bitcoin was first. well, coined in 2008 when Satoshi Nakamoto (likely a pseudonym for one or more developers) wrote a paper about a ”peer-to-peer version of electronic cash that would allow online payments to be sent directly from one party to another without going through a financial institution.”

For more than a year, however, Bitcoin has been on a roller coaster ride, with its value dropping from a peak of nearly $20,000 to a little more than $3,500, mainly due to the fact that it has no intrinsic value; its worth is based only on high demand and limited supply. Unlike fiat currencies or stocks, there is no institution or government backing the value of bitcoin.

That may change for cryptocurrencies someday.

Governments have already made overtures toward creating stablecoins, or cryptocurrency that’s backed by a stable asset such a gold or traditional fiat currency. Blockchain is also being used to digitize other assets, such as cars, real estate and even artwork.

Blockchain, or distributed ledger technology, isn’t a single technology. Rather it’s an architecture that allows disparate users to make transactions and then creates an unchangeable, secure record of those transactions.

Public vs. private blockchains

As a peer-to-peer network, combined with a distributed time-stamping server, public blockchain ledgers can be managed autonomously to exchange information between parties. There’s no need for an administrator. In effect, the blockchain users are the administrator.

A second form of blockchain, known as private or permissioned blockchain, allows companies to create and centrally administer their own transactional networks that can be used inter- or intra-company with partners.

Additionally, blockchain networks can be used for ”smart contracts,” or scripts for business automation that execute when certain contractual conditions are met. For example, after a bad batch of lettuce resulted in customers becoming sick from e-coli, Walmart and IBM created a blockchain-based supply chain to track produce from farm to table. Walmart has asked its produce suppliers to input their data to the blockchain database by September 2020. Once on the blockchain, produce can be automatically tracked through smart contracts from point to point, removing human intervention and error.

After piloting a blockchain-based produce supply chain tracking system, Walmart and Sam’s Club are telling suppliers to get their product data into the system so they can begin tracking produce from farm to store. The deadline: September 2020.

De Beers,which controls about 35% of the world’s diamond production, has also launched a blockchain-based supply chain to track diamonds for authenticity and to help ensure they aren’t coming from war-torn regions where miners are exploited.

Smart contracts can also be used to approve the transfer of assets, such as real estate. Once conditions are met between buyers, sellers and their financial institutions, property sales can be confirmed on DLT. For example, New York-based ShelterZoom this year is launching a real estate mobile application that lets real estate agents and clients see all offers and acceptances in real time online. It will also allow access to property titles, mortgages, legal and home inspection documents through the Ethereum-based encrypted blockchain ledger.

The De Beers’s TrustChain blockchain network will track and authenticate diamonds, precious metals and jewelry at all stages of the global supply chain, from the mine to the retailer.

How secure is blockchain

While no system is ”unhackable,” blockchain’s simple topology is the most secure today, according to Alex Tapscott, the CEO and founder of Northwest Passage Ventures, a venture capital firm that invests in blockchain technology companies.

”In order to move anything of value over any kind of blockchain, the network [of nodes] must first agree that that transaction is valid, which means no single entity can go in and say one way or the other whether or not a transaction happened,” Tapscott said. ”To hack it, you wouldn’t just have to hack one system like in a bank. you’d have to hack every single computer on that network, which is fighting against you doing that.

”So again, [it’s] not un-hackable, but significantly better than anything we’ve come up with today,” he said.

The computing resources needed for most blockchains are tremendous, Tapscott said, because of the number of computers involved. For example, the bitcoin blockchain harnesses anywhere between 10 and 100 times as much computing power as all of Google’s serving farms put together.

As with any emerging technology, blockchain faces challenges and barriers to adoption.

But even a larger scale can’t always prevent hacks.

A recent “51 percent attack” on the Ethereum Classic token exchange showed why even blockchain is not impermeable to gaming. A 51 percent attack refers to a bad actor who gains control of the majority of CPUs in a cryptocurrency mining pool. Such attacks are generally limited to smaller blockchains with fewer nodes because they’re more susceptible to a single person seizing control based on a Proof of Work (PoW) consensus mechanism.

Even though blockchain networks are secure, the applications running atop them may not be as safe, according to Bruce Schneier, a cryptographer and security expert.

”That’s not how this sort of thing will get broken. It’ll get broken because of some insecurity in the software,” Schneier said.

Blockchain’s advances rely on scalablity

One of the major issues facing blockchain involves scalability, or its ability to complete transactions in near real time, such as clearing payments via credit cards.

Scalability has already been identified as an issue with cryptocurrencies such as bitcoin and Ethereum’s Ether. If a distributed ledger is to achieve adoption by financial technology (FinTech) companies and compete with payment networks hundreds of times faster, it must find a way to boost scalability and throughput and address latency problems.

Sharding is one of several popular methods being explored by developers to increase transactional throughput. Simply stated, sharding is a way of partitioning to spread out the computational and storage workload across a P2P network so that each node isn’t responsible for processing the entire network’s transactional load. Instead, each node only maintains information related to its partition, or shard.

The information contained in a shard can still be shared among other nodes, which keeps the ledger decentralized and theoretically secure because everyone can still see all ledger entries; they simply don’t process and store all of the information such as account balances and contract code, for instance.

In today’s blockchains, each authenticating computer or node records all the data on the electronic ledger and is part of the consensus process. In large blockchains such as bitcoin, the majority of participating nodes must authenticate new transactions and record that information if they are to be added to the ledger; that makes completing each transaction slow and arduous.

Because of that, bitcoin, which is based on a PoW, can only process 3.3 to 7 transactions per second – and a single transaction can take 10 minutes to finalize.

Ethereum, another popular blockchain ledger and cryptocurrency, is only able to process from 12 to 30 transactions per second.

By comparison, Visa’s VisaNet on average processes 1,700 transactions per second.

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