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Explained: Why is blockchain regarded as revolutionary?

“Blockchain” and “cryptocurrency” have been around for nearly a decade now. What do we know about these technological developments? Would you be able to explain clearly what they are and how they function? What practical application does the blockchain technology offer and how may it change the world?

Euronews asked an expert in this field, Zurich-based lawyer Fabio Alves Moura, to put these complex concepts in simple terms. Some of the answers are also commented by Tomaž Levak, Co-Founder & CEO of the Ljubljana-based OriginTrail, one of the many tech startups exploiting the blockchain know-how.

What is the blockchain technology? What are its biggest benefits?

Fabio Alves Moura: Blockchain technology could be explained in a way that even a 4-year-old child would understand. This explanation, however, would be neither realistic nor useful, as it would reduce the technology to a set of generalisations. So, if we really want to understand blockchain, we should not oversimplify the answer. And yet, it is quite simple.

First, let us take two steps back in order to see the big picture. The first step back is necessary to revise the nature of the internet. Today, the internet is one of the key structural backbones of our society. Almost 100% of all telecommunications flow through the internet, where information and knowledge are registered, shared and developed online.

The whole global financial system works online via the internet. Marketing and consumption, entertainment and political campaigns, social networks — all of these human activities increasingly happen online, over a network known as internet, designed in the 1970s, which still maintains at its core the same structural design, same architecture and data sharing protocols that it had in the beginning almost 50 years ago.

The internet is designed as a decentralised network. This means that the computers, smartphones and other devices are connected to a certain node — a focal point, a server, an Internet Service Provider or a supercomputer. This node, in turn, connects to other nodes in a way that allows all connected devices to communicate via an intermediary: the established connection or several in-between nodes.

This is where blockchain comes in: it changes the way in which the data is stored, distributed and even generated. The blockchain is, at its core, nothing more than a new way to structure data registers. This is done in a way that was first developed in 2009, generally called “distributed network” as opposed to the “decentralized network”.

In a traditional internet model, all computers connect to nodes that centralise and redistribute the information, forming a flow. In the blockchain, the structure of data storing and distribution is entirely different. Thanks to several technological developments, such as cryptography and advanced data compression, all the computers in a blockchain network store ALL the information shared in that network. At the same time, all the computers connect to ALL the others. The system works without centralising nodes, as all the connected devices are nodes themselves.

In a very simplified way, this is what the different systems look like: a centralised, a decentralised and a distributed (blockchain type) networks. In the third figure below all points would be connected to all other points, not only to some of them!

This is why blockchain is also described as a Distributed Ledger Technology (DLT). It is the ledger, or registry, that is completely distributed over the network. [There are also other DLT models that are not blockchains and, theoretically, you might have a blockchain that is not a DLT].

Tomaž Levak, OriginTrail

Blockchain’s strongest characteristic is that it is decentralised and that it transforms trust as we know it. It is a digital ledger of transactions that are stored across a network of computers (nodes), not in one central place, and without a single entity controlling it. Because there is no central point where the data is entered (and the trail of transactions is stored on thousands of computers), it is virtually impossible to change the data once it comes into the system: there is no one single authority that could change the data. Blockchain brings the promise of trusted data exchange in the digital world. Until now, we were always linking our trust to the institutions that vouched for it with their reputation, such as banks, agencies, companies, etc. With the blockchain technology, trust becomes part of the system itself.

First, let us take two steps back in order to see the big picture. The first step back is necessary to revise the nature of the internet. Today, the internet is one of the key structural backbones of our society. Almost 100% of all telecommunications flow through the internet, where information and knowledge are registered, shared and developed online.

So, why “block” and why “chain”?

The name is easy to understand once we get a grasp of how the distributed network functions.

How do we reach some order in a network with no central authority controlling the nodes? There may be (and, in fact, there are) several networks structured under a blockchain model. Every computer or device that joins a blockchain network receives a file with all the information ever created in that blockchain, and adheres to a simple set of rules known as protocol. The main rule says that after X minutes (or X seconds) all the information on the network is packed, compressed and cryptographed. This packaged information forms what is called a block, which is followed (after X minutes or seconds) by another linked block, and so on. These blocks form a chain of blocks, or a blockchain.

The “sealed” blocks are still accessible, so one can consult the information stored in them. However, all this information is ‘written in stone’ and can never be deleted or changed. Changing the data in a chained block is technically impossible. And there is only one way of even deleting it: you would have to delete the whole blockchain. Every single computer that has ever been connected to the blockchain would be able to re-establish the blockchain structure and content. This process may be automated by the blockchain rules.

Why is this revolutionary?

It’s time now for the second step back that we talked about earlier. Consider the structure of society and the world today. Think about the internet and about its decentralised structure based on several nodes. Who controls the nodes, controls the internet. To a certain constantly growing degree, who controls the internet controls the world.

You can control some nodes to bring censorship to a whole country or region, as it happened with Facebook, WhatsApp or Telegram. One can control the nodes to introduce a financial/economic embargo to a country. Such is the case of Iran, which was “disconnected” until last year from the global financial system: you could not draw cash from an ATM in Iran, nor pay with a credit card, or send/receive funds to and from abroad. The only solution was a physical delivery of a sum, in your pocket, in an aeroplane or by train.

Controlling the right nodes allows for data retrieval, manipulation and even for the creation and massive distribution of information, including fakes.

Today, there is much more digital money than the real money: about 92% of the world’s cash is in fact digital. This means that it was not created by the governments, but rather created by private and commercial banks, and exists only on the internet. At the same time, online portals and social networks have become the main space for promoting political agenda and influence, no matter if you live in a democracy or a dictatorship.

Regardless of conspiracy theories, the fact is, ruling the world has always remained within reach of very few privileged and powerful. The internet architecture simply reproduces this fact. The blockchain technology finally came to change everything.

How powerful is blockchain?

Considering its architecture without centralising nodes, it is potentially impossible for a blockchain network to be controlled or suspended by any authority. This is true once the network reaches a certain maturity level, i.e. a high degree of acceptance in the society. This means that a blockchain, once put in place and sufficiently adopted with a reasonable number of workstations connected to it, is virtually unstoppable.

Just to have a perspective on the computational power of a blockchain network, a Forbes article affirms that the Bitcoin blockchain global computational power is 256 times greater than that of the world’s top 500 supercomputers combined. This article appeared back in 2013: nowadays it is estimated to be more than 800 times greater than the whole Google system.

What change comes with the blockchain?

To understand its potential impact on society and why many influential people criticise the bitcoin and other cryptocurrencies so ferociously, let us look at a simple scenario regarding the adoption of a cryptocurrency. Let’s say, I own an electronics shop and I start to accept payments in bitcoins. Then the authorities adopt a law saying that the bitcoins are banned in my country. I can still accept the payments in bitcoins since on the blockchain network the authorities have absolutely no power to control or block it.

If I don’t sell my bitcoins for fiat money (i.e. state-issued traditional currencies such as euro, US dollar, etc.), there is no way for a government to know that I have them. So, if then the baker around the corner, the supermarket, the pharmacy and the family doctor start to accept payments in bitcoins, I may very well cover most of my expenses with them. As more and more businesses and people start to accept bitcoin, we have a declining need for the fiat money.

However, if we stop using the fiat money for most of our transactions, the risk is I might one day perceive the government as corrupt or inefficient, and then, will I declare all the bitcoin operations for the tax authorities? I have a choice not to. What happens with a government if people start to have the option of not paying taxes? We should keep in mind, that by this point we also do not pay any banking fees. So with that point, the banks have either changed radically to try and retain you as a client, or they are obsolete by now.

This might sound like science fiction, but let us recall a few simple facts:

  1. Blockchain networks are unchangeable and unstoppable.
  2. Once set up, they cannot be controlled.
  3. Most people in the world dislike their government and often are not satisfied with the traditional financial system, which in some countries charges up to 15% monthly interest rates for late payments on credit.
  4. Most of the people in the world live in countries with weak political systems and low-quality financial systems with shaky national currencies.
  5. Today, less than 1% of the global money is represented by cryptocurrencies. This percentage, however, has been annually growing since the introduction of bitcoin in 2009. Back then it was worth less than a cent. Today, it is worth around USD 6.200 and no other asset or currency in human history has ever experienced a similar growth in value.

What applications the blockchain technology might have?

There is a multitude of applications. Here is only a short list:

  • Cryptocurrencies;
  • Documents certification;
  • Tracking of products and goods;
  • Voting systems;
  • Project management;
  • Financial services;
  • Supply chain management;
  • CRM (Client relationship management);
  • Dispute settlement;
  • Tokenisation of assets, rights, etc.: creating tokens in a blockchain platform to represent anything, from a fraction of a house to a share of a company, from rights under a contract to the possibility of use of some features in a platform. These tokens can be sold anywhere, be easily transferred or stored, tracked or left untraceable, all depending on the blockchain’s protocol;

Being more specific, I’d like to mention these three existing projects:

Arcade City: an Uber-like app without the Uber company behind it. The blockchain, in a distributed way, gets the car lift requests and sends them to the closest registered drivers, and it does the same with the payments. As there is no company behind the scheme, it does not charge the drivers any fee on each ride (which in some countries is as high as 25% of the value settled by the passenger), thus resulting in a better pay to the drivers and cheaper ride prices.

Ehab: a blockchain platform in which anyone can finance the construction of their own house selling tokens to people all over the world. They get the money from these investors, the token buyers, and build the house, paying back the token holders at better rates than otherwise received from a bank loan. At the same time, the token holders get more value for their money than they would get by investing in a traditional bank investment option.

Inflr: a platform in which your influence on different target audiences in social networks is measured by artificial intelligence coupled with big data and you can be offered to post, comment or share content and get paid for it — without any middle-man charging you a fee.

Tomaž Levak, OriginTrail

Blockchain was first used in financial technology with cryptocurrencies, such as the pioneering bitcoin. Clearly, some industries can benefit from this technology just as much. In any system with many participants (in business terms, – partners) blockchain can provide a neutral way of documenting transactions. For instance, it is already used to provide a trusted proof of data exchange in supply chains. In OriginTrail we use an app for consumers to scan their yogurt in a store and see, which farm the milk came from and what stops it made on its way to the point of sale.
Supply chains carry more than two thirds of the global GDP and bring us goods from around the world, from food to gadgets. Using the blockchain, data can more easily be exchanged between partners. Food safety, brand protection, fighting counterfeit products, more efficient supply chain management – you name it! These are just a few examples of application of the blockchain. Blockchain may be used as a foundation for incentivising businesses to exchange more data while making every source of this data accountable for its integrity and credibility. This may consequently improve the quality of big data operations and incite constant improvement of information by all participating entities.

What stands behind the multiple cases of fraud with cryptocurrencies?

Crypto exchanges are usually not built on a blockchain, they are simply trading places in which people trade fiat money for cryptocurrencies, or between different cryptocurrencies, so they can still be as vulnerable to hacker attacks as any other website. This is why it is always advisable to have a physical cyber-wallet, a USB pen-drive with a strong security protocol, which you keep safe and disconnected from the internet, only connecting it at the moment you need to sell or buy cryptocurrencies, thus limiting exposure to the unnecessary risks.

Interestingly enough, these wallets never contain the bitcoins or cryptocurrency as such. They only store private cryptographic keys that every user of a blockchain network may access, while the cryptocurrencies are always stored at the blockchain platform itself. Regardless of the exchanges, cryptocurrency owners can always sell and buy cryptos in a peer-to-peer way, i.e. directly from other people, thus rendering the whole operation inside the blockchain network risk-free.

What happens at the cryptocurrency farms?

That might be hard to believe if you do not have a mindset of a software developer. Perhaps, this is why people give so many different answers to this question, although the answer is simple.

Every time a blockchain system seals a new block (i.e. every 10 minutes in case of the bitcoin blockchain, or every 45 seconds for ethereum), this block is “packed” with four elements: its content (the operations and data registered), a time stamp, the block’s hash and the hash of the previous block.

What’s a hash? In simple terms, it is a function (expressed in a combination of numbers and letters) that encrypts a pack of data. So, every pack of data in a blockchain, or every block, has its own hash, and the blocks have the hash of the previous block, too, so that they are organised in a chronological order. The hash’s final format, though, is a random number, generated by the computers connected to a blockchain network. This random number, albeit encrypting all the information on the block, has to be different from any other hash number ever generated for a previous block in that blockchain. These are the calculations made at the cryptocurrency mining farms. In order to reward the computer that first calculates this hash number at the closing of every new block, a certain number of bitcoins (or the respective cryptocoins in other blockchains) is issued as a sort of payment for the work produced.

This is a mechanism known as “proof of work”, invented along with the bitcoin as a way to generate, seal and link the blocks of its blockchain. However, new ways of doing this operation are emerging, such as the “proof-of-stake”, for instance.

Most of the energy used to mine the bitcoins is consumed by the mini-ventilators used to cool down the computers’ microprocessors that are working 24/7. To mitigate this effect, mining fields are taken to colder countries or regions, such as Iceland, Finland or the Russian Siberia, and in some cases even to the underwater farms, among other creative initiatives.

Tomaž Levak, OriginTrail

If you snap a picture with your phone and send it to your friend via email, both you and your friend have the same picture. With digital assets the picture is different. If a bitcoin is sent to one person, there needs to be a clear proof that the previous owner does not possess it anymore. This proof is generated by many computers (miners) and is recorded in “blocks” on a network of computers, each block based on the previous one, making all blocks in the chain impossible to modify, hence the name “blockchain”. This concept is known as “proof of work”. It is indeed consuming a lot of electricity and is part of the answer, why it is rather expensive to store large amounts of data on a blockchain. There are other types of proof developed today that can be less energy-thirsty. At OriginTrail, for example, we developed a protocol based on blockchain: companies store their data on a special network and only “fingerprints” of these transactions are actually stored on the blockchain itself, making it much more efficient.

Blockchain has been accused of helping criminals and terrorists. Does it have a negative impact on society?

When the internet was created, some people — for the very first time in human history — came up with an amazing set of criminal activities. Some started selling drugs, some sold human organs or weapons illegally, others took part in human trafficking. Also, the internet was used to give a digital support for money laundering, something impossible without the existence of the internet. With the appearance of blockchain, a new circle of criminal initiatives came up once again, and a conservative view would make us believe that, if it wasn’t for the bitcoin, the drug dealers would have never existed.

I prefer to turn to humour in my answer, as I often have to address this question. On a more serious note, there is no statistical evidence of an increased criminal activity due to the creation of the blockchain technology and its most famous application, the cryptocurrencies. When a new technology is created, the “baddies”, who are under pressure in other fields, usually get a grasp of these new technologies fast enough to perform their regular “business”. However, eventually, new ways of chasing the criminal minds always make the system safer. This is also the case of blockchain with its privacy protection, which may present a bigger challenge for tracking criminals.

Tomaž Levak, OriginTrail

The accusations are probably leftovers from the early days of bitcoin, developed 10 years ago. Today we are way beyond that point. The blockchain technology is now actively audited by the majority of the Fortune 500 companies and central banks around the world. Many of them also set up high-level consortia and workgroups, such as Enterprise Ethereum Alliance, of which our company is also a member. To achieve trust in transactions, you need to overcome two obstacles: bad data and bad character. Blockchain enables immutable transactions that are stored on the blockchain indefinitely – thus solving the problem of bad data. Bad character can never be completely avoided, but immutability and traceability of transactions discourage these malicious actors to use the blockchain, ensuring that its use for fraudulent activities is reduced to a minimum. In short, if you are a “baddie”, you would want to stay away from immutable transactions as much as possible.

How can consumers avoid getting scammed?

The behaviour should be the same as we would normally adopt: if you were to open an account in an online bank, you would carefully check the bank’s website and perhaps try to find out who the owners are, and so on. Same as when you think of buying an exotic fruit in a supermarket: if you don’t know how to select a good one, you would ask someone for help or quickly Google it on your smartphone. If the fruit may be both delicious and poisonous, you would run a double and even a triple check. It’s exactly the same with cryptocurrencies and blockchain.

Tomaž Levak, OriginTrail

Blockchain holds the promise of being a truly democratic technology. Widely-used blockchains, such as Ethereum, are “permissionless”, meaning that anyone has an equal access to them, to store or read the data there. Cryptocurrencies like bitcoin are already used for fast monetary transactions anywhere in the world, avoiding all intermediaries. With solutions based on Ethereum, like the one OriginTrail is building, any SME can quickly connect its data to the blockchain without breaking the bank, enabling it to safeguard and showcase the added value of their products.

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O que é e como funcionam as stablecoins

Stablecoins, ou “moedas estáveis”, é um termo designado para qualquer criptomoeda vinculada a um ativo lastreado, como o dólar ou o ouro, mas que não está subjugada a nenhum banco central.

Ou seja, diferente do Bitcoin, as vezes temido pela sua volatilidade, as stablecoins se apresentam como uma alternativa aos ativos digitais, por terem um preço estável. O que facilitaria seu uso como moeda de troca no mundo real.


Imagine pagar R$ 5, por um capuccino no seu café favorito hoje, e amanhã descobrir que ele vale metade do preço, ou pior, o dobro. Os entusiastas das moedas estáveis acreditam que elas podem solucionar esse problema.

“As moedas têm, entre outras, duas funções principais: servirem como meio de pagamento e como reserva de valor. Se a moeda é muito instável, não dá pra saber quanto ela realmente vale e [portanto] ela perde a equivalência no mundo físico. Então você consegue ampliar muito o uso dela, se você cria uma moeda minimamente estável”, comenta o especialista em blockchain e criptomoedas e sócio da Moura & Lobo Advogados, Fabio Alves Moura.

Apesar de cético quanto a viabilidade das stablecoins nesse momento, Moura argumenta que sua atratividade decorre do fato de que elas se apresentam como mais consistentes em relação a volatilidade.

Então quer dizer que as stablecoins são a solução para as criptomoedas? Vamos com calma. Como todo sistema complexo, elas têm prós e contras.

Segundo Sherman Lee, em um artigo para a Forbes, a criptomoeda ideal deve seguir quatro características: ser descentralizada, escalável, garantir a privacidade e manter um preço consistente.

Repito, em um contexto ideal. E para quem pensa que as stablecoins possuem todos esses atributos, tenho uma notícia pra dar: elas podem não ser tão estáveis assim. Confuso? Para entender esse ponto é preciso conhecer alguns modelos presentes no mercado.

Stablecoins com base em moeda fiat

Como o próprio nome já diz, esse tipo de ativo digital é lastreado por uma moeda fiduciária em uma conta de reserva.

Um dos mais conhecidos é o Tether (USDT), 100% apoiado no dólar (USD), com taxa de conversão de 1 USDT para 1 USD. No entanto, o problema desses sistemas é o alto custo e a lentidão de processamento, já que necessita de um intermediário confiável para garantir as transações. Um contrassenso em um ecossistema que prega pela descentralização.

É aí que surge a questão. Por ser uma moeda descentralizada, os desenvolvedores do Tether podem criar quantas USDT eles quiserem. O que gera risco de insolvência e custos com fiscalização. Como explica Moura:

“Criar uma moeda referenciada significa criar um mecanismo artificial de emissão. Ou você cria uma estabilidade natural, como por exemplo o preço da soja – ainda que ele mude, conseguimos prever quais fatores influenciaram sobre essa oscilação, em algum grau – ou você cria uma estabilidade artificial, que é um mecanismo como um fundo garantidor de investimento, e isso é muito custoso”.

Stablecoins com base em outras criptomoedas

Esse tipo de ativo é basicamente apoiado por outras reservas de criptomoedas ou token na blockchain. Ou seja, em uma carteira de ETH, por exemplo, cada token representa o valor de US$ 1 proporcional ao ativo.

Para resolver o problema da volatilidade, os criadores dessas stablecoins estabelecem que para cada moeda gerada é necessário depositar US$ 1,5 na criptomoeda que será lastreada.

Esse mecanismo garante que o valor do token será preservado mesmo que haja uma queda do ETH.

Inicialmente esse parece ser o modelo ideal, já que estamos falando de um sistema descentralizado que não requer um terceiro para investir ou sacar seus ativos. Porém, também estamos tomando como base as criptomoedas e não devemos esquecer que elas ainda sofrem de grande volatilidade – o que desafia a estabilidade da stablecoin a longo prazo.

Um dos projetos que utiliza esse método é o Havven (HAV).

Stablecoin com base em algoritmo

O ponto de partida desses tokens é semelhante ao princípio econômico dos bancos centrais. O preço é determinado com base em algoritmos pré-programados e na quantidade da stablecoins no mercado.

Nesse modelo não é necessário o uso de outro ativo para emparelhar o valor da stablecoin, nem são exigidas garantias, mas o problema aqui é desenvolver um algoritmo que expanda e contraia de forma descentralizada. Um exemplar desse tipo de moeda é a Basis.

Adesão em massa

A vantagem das stablecoins está no fato de os traders obterem rapidamente um dólar e aumentar a capacidade de liquidez das bolsas. Por outro lado, a ideia de uma moeda estável requer, em certa medida, a confiança de terceiros, o que vai contra o conceito cripto.

É por esse motivo que alguns especialistas se voltam para o fortalecimento das criptomoedas (BTC, ETH, XRP, etc.) em detrimento dos projetos de stablecoins. Isso porque o desafio da liquidez poderá ser solucionado ao longo do tempo, à medida que um número maior de pessoas aderir ao uso.

Esse mecanismo garante que o valor do token será preservado mesmo que haja uma queda do ETH.

“Para ter um mecanismo natural de estabilidade, tem que haver uma adoção muito grande e um momento posterior ao que temos agora”, pondera Fabio Moura, ressaltando que o mercado ainda não está consolidado e por isso requer cautela e estudo.

“Vale se perguntar qual a sua expectativa diante desses ativos, focando no conhecimento sobre as criptomoedas e o que ela representa”, destaca o advogado.

  • Fácil conceituação e por isso melhor aceitação do mercado
  • Maior liquidez para traders e investidores
  • Paz mental durante as transações
  • Sujeito a manipulação da oferta de stablecoins
  • Requerem algum tipo de centralização e auditorias
  • Alto custo e lento para auditar
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Criptomoedas – Como este ativo digital vai impactar os negócios?

O ano de 2017 foi um ano único na história das criptomoedas (ou cryptocurrencies em inglês). Aos que compraram estes ativos eletrônicos em seus lançamentos, ou seja no ICO (“Inicial Coin Offering”), tiveram em média um retorno de 1200% durante o ano de 2017[1]. Aqueles mais temerosos em relação ao risco extremo de um ICO puderam escolher criptomoedas já em circulação como o Bitcoin (BTC) o Ethereum (ETH) ou o Ripple (XRP). Os retornos foram igualmente absurdos chegando a 1336% para Bitcoin, 8984% para o Ethereum e 2016% para o Ripple durante o ano de 2017.

The literature on failures in large construction projects (or Mega Projects) presents several definitions to classify a project as flawed, but all these definitions converge to the same point:

Jargões como blockchain, tokens, distributed ledger, mineração, altcoins, ICO, hard forks, dominaram o noticiário quando o assunto era criptomoedas. Ao mesmo tempo opiniões sobre uma possível bolha especulativa em torno deste tipo de ativo eletrônico foram dadas aos milhares com assídua cobertura pela mídia na sua incansável busca de uma manchete.

Como todo ativo que possui um valor maior que zero, as criptomoedas surgiram com o propósito de resolver um problema da sociedade. Com isso seu valor está vinculado a sua capacidade de solucionar este problema. Aqui, assim como na sua vida, é importante não confundir preço com valor. Warren Buffet tem uma definição interessante que é a seguinte: “Preço é o que você paga, valor é o que você leva”[2]

A pergunta que deveria ser feita por qualquer um que queira entender criptomoedas é a seguinte: O que você leva quando compra 1 BTC? (que no momento em que escrevo este artigo tem seu preço negociado em aproximadamente R$ 54.000,00)

Para entender a resposta desta pergunta é necessário primeiro entendermos um pouco mais a fundo do que se trata esta tecnologia que já tem quase 10 anos e qual o problema que ela se propõe a resolver.

As criptomoedas são ativos eletrônicos que podem ser utilizados como meio de pagamento. Elas se utilizam da tecnologia blockchain e da criptografia para assegurar a validade das transações e a criação de novas unidades da moeda. Simplificando um pouco o conceito, criptomoedas são ativos guardados em um livro-razão público (“distributed ledger”) onde sua propriedade é assegurada por uma tecnologia fantástica que jamais permitiu manipulações, mesmo após quase 10 anos de seu lançamento. E o melhor, toda tecnologia embarcada nesta moeda é open-source, ou seja, o software utilizado possui código fonte aberto e pode ser livremente copiado, modificado e melhorado. Por esta razão se vê milhares de novas criptomoedas sendo lançadas todos os meses.

Em linhas gerais aquele caderninho de fiado da padaria que era anotado os débitos e créditos foi atualizado e melhorado, tornou-se público e todos têm acesso a ele. É possível ler seu conteúdo livremente, distribuí-lo (replicá-lo) igualmente as milhões de pessoas que participam da rede e só aceita alterações (novas entradas) daqueles que possuem a chave que autoriza essa modificação. A criptomoeda é somente a unidade monetária utilizada neste caderno de fiados moderno para controlar os débitos e créditos de cada um. É como se o dono da padaria tivesse inventado sua própria moeda e a utilizasse em todas as entradas de débito e crédito no caderno.

É relativamente simples entender que o valor desta tecnologia não está na unidade monetária criada e sim neste fantástico caderninho de fiados dos tempos moderno a prova de fraudes e afins que chamamos de blockchain.

E qual é o problema que esta invenção, o blockchain, veio resolver?

Mudanças radicais de paradigmas são mais fáceis de serem visualizadas quando estão distantes de nós, como por exemplo a imprensa escrita. A imprensa escrita foi seguramente a mudança de paradigma mais influente entre os séculos XV e XVIII, pois possibilitou ao homem comum o acesso ao conhecimento antes exclusivo a poucos como nobres, monges e membros da igreja. O motor criado no século XIX, veio mudar o paradigma energético da época, ajudando a acabar com a escravidão e consequentemente com o colonialismo. Conseguiu resolver o problema de energia da sociedade já que antes do motor, a energia fornecida era puramente manual ou de tração animal. A internet, inventada no século XX, mudou completamente o paradigma de distância e da disseminação da informação. O mundo é muito menor hoje do que 50 anos atrás dado que hoje é possível facilmente fazer negócios com qualquer um a qualquer distância graças à internet.

Com o aumento exponencial no número e no volume de negócios entre pessoas e empresas proporcionado pela internet, existe uma deficiência nesse ambiente de transação que vem aumentando e que demanda uma solução competente. Como resultado, aquele que conseguir preencher essa lacuna será lembrado por muito tempo e logicamente acumulará muito mais riqueza do que é possível se gastar em uma vida. Essa lacuna chama-se confiança e quem conseguiu fechá-la chama-se Satoshi Nakamoto[3], e a invenção chama-se blockchain (aquele caderninho de fiado moderno que conversamos a pouco).

É natural do ser humano que primeiro se confie na pessoa ou na empresa e depois se faça o negócio. Atualmente nossa solução para resolver a questão da confiança para se fazer negócio é ainda parcial e concentra-se em terceirizar essa atividade a um intermediário que se compromete a guardar os registros pertinentes para consulta quando se fizer necessário. Hoje em dia conhecemos muito bem esses intermediários, tais como SERASA, SPC, bancos, cartórios de registro de imóveis, cartório de registro civil, DETRANS, secretarias de segurança pública, órgãos certificadores, entidades de classe, juntas comerciais, cartórios de protesto, operadoras de cartão de crédito, etc.

A única, ou grande parte da atividade destes intermediários é somente prover um certo grau de confiança aos pares que estão dispostos a transacionar bens ou serviços. Infelizmente estes intermediários por sua natureza estão sujeitos a erros nas informações disponibilizadas, seja por declaração equivocada proposital (ex.: valor de venda a menor de um apartamento em um cartório), por adulteração pura e simples (ex.: identidade falsa, cartão de crédito clonado) ou até pela falta completa/erro na inserção de algum registro.

A tecnologia do blockchain veio revolucionar completamente a maneira de como obtemos confiança para nossos negócios no dia-dia além de potencialmente eliminar todos os intermediários que oferecem este serviço.

Conforme vimos, o blockchain é um grande livro-razão (“database”), aberto ao público, distribuído e replicado milhões e milhões de vezes dentro dos computadores da rede (mineradores) que, devido a tecnologia de criptografia implementada, é impossível a adulteração de registros já acordados como verdadeiros no passado ou também de se registrar eventos sem a chave privada específica para isso (ex. débito de X bitcoins na carteira Y).

Em resumo o blockchain, que é a tecnologia por trás do bitcoin e de qualquer outra criptomoeda, mudou completamente o paradigma de confiança dando uma solução extremamente competente e barata para o problema. Assim como no século XIV onde todos se perguntavam como poderiam colocar a imprensa dentro de seus negócios, no século XXI a pergunta foi como colocar a internet dentro de seu negócio. Hoje a pergunta que fica é: Qual minha estratégia para utilizar o blockchain no meu negócio? Seja ela qual for, pode ter certeza que vai passar pela resolução do mesmo problema: obter confiança plena para dar suporte e fomentar as trocas de bens e de serviços.

Abraços e sucesso.

Luiz Junqueira

Mora e trabalha em Zurique na Suíça. É diretor de projetos para África Subsaariana nas áreas de infraestrutura, energia, mineração, óleo e gás e investidor/empreendedor em cryptocurrencies desde 2013. Formado em Engenharia Civil pela UNESP (2002), pós-graduado em Engenharia de Produção pela USP (2006) e em Gestão de Projetos pelo ITA (2007) com MBA pela SBS Swiss Business School (2016).