Las cadenas de bloques son seguras por diseño y son un ejemplo de sistema distribuido con un alta tolerancia a faltas bizantinas. El consenso descentralizado ha sido logrado gracias a la cadena de bloques. Las cadenas de bloques resuelven el problema de doble gasto sin la necesidad de una autoridad certificada o un servidor central, asumiendo que no se va a dar el ataque del 51% (que ha funcionado con varias criptomonedas).

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1. The blockchain is a ledger that keeps track of how much ‘stuff’ (ie BTC, ETH,…create your own currency if you wish) you have. Its the history of transactions. ‘Ethereum’ provides a platform for building contracts…if a contract’s conditions are met, then a transaction (whose rules and automation are agreed ahead of time) automatically occurs and the result of that transaction becomes a part of the ledger. Anyone will be able to see that an address (sellers’ public key) has given ‘stuff’ to another address (purchasers’ public key).
An increase in cryptocurrency mining increased the demand of graphics cards (GPU) in 2017.[37] Popular favorites of cryptocurrency miners such as Nvidia's GTX 1060 and GTX 1070 graphics cards, as well as AMD's RX 570 and RX 580 GPUs, doubled or tripled in price – or were out of stock.[38] A GTX 1070 Ti which was released at a price of $450 sold for as much as $1100. Another popular card GTX 1060's 6 GB model was released at an MSRP of $250, sold for almost $500. RX 570 and RX 580 cards from AMD were out of stock for almost a year. Miners regularly buy up the entire stock of new GPU's as soon as they are available.[39]

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Ethereum’s core innovation, the Ethereum Virtual Machine (EVM) is a Turing complete software that runs on the Ethereum network. It enables anyone to run any program, regardless of the programming language given enough time and memory. The Ethereum Virtual Machine makes the process of creating blockchain applications much easier and efficient than ever before. Instead of having to build an entirely original blockchain for each new application, Ethereum enables the development of potentially thousands of different applications all on one platform.

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1. The blockchain is a ledger that keeps track of how much ‘stuff’ (ie BTC, ETH,…create your own currency if you wish) you have. Its the history of transactions. ‘Ethereum’ provides a platform for building contracts…if a contract’s conditions are met, then a transaction (whose rules and automation are agreed ahead of time) automatically occurs and the result of that transaction becomes a part of the ledger. Anyone will be able to see that an address (sellers’ public key) has given ‘stuff’ to another address (purchasers’ public key).

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Despite the fallout from The DAO hack, Ethereum is moving forward and looking to a bright future. By providing a user-friendly platform that enables people to harness the power of blockchain technology, Ethereum is speeding up the decentralization of the world economy. Decentralized applications have the potential to profoundly disrupt hundreds of industries including finance, real estate, academia, insurance, healthcare and the public sector amongst many others.

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Ethereum can also be used to build Decentralized Autonomous Organizations (DAO). A DAO is fully autonomous, decentralized organization with no single leader. DAO’s are run by programming code, on a collection of smart contracts written on the Ethereum blockchain. The code is designed to replace the rules and structure of a traditional organization, eliminating the need for people and centralized control. A DAO is owned by everyone who purchases tokens, but instead of each token equating to equity shares & ownership, tokens act as contributions that give people voting rights.
↑ «Decreto Constituyente sobre criptoactivos y la criptomoneda soberana Petro». Travieso Evans Com. Archivado desde el original el 16 de mayo de 2018. Consultado el 16 de mayo de 2018. «Artículo 6. El órgano de control y protección en materia de criptoactivos creada por el Ejecutivo Nacional, será la Superintendencia de la Criptomoneda y Actividades Conexas Venezolana, tendrá como función principal la de velar por el normal y legal funcionamiento de gestión que desarrollen las personas naturales o jurídicas que participen en el intercambio de la Criptomoneda venezolana Petro y demás criptoactivos creados por la República Bolivariana de Venezuela; dirigir el Sistema de registros de mineros virtuales, casas de intercambio y demás entes dedicados al ahorro y a la intermediación virtual en criptomonedas y criptoactivos; emitir los permisos y licencias; cobrar las tasas y tarifas que establezca; y en general, impulsar las medidas destinadas al desarrollo de los criptoactivos nacionales y su intercambio en el mercado nacional e internacional. La Superintendencia debe garantizar la protección de los derechos de las personas que participen en estas actividades.»

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Esta es una explicación técnica para todo el mundo de como realmente funcionan las criptomonedas, sus transacciones, mineria o minado, sus origenes, problemas y mucho más. ¿Como funciona la minería? ¿Vale la pena minar? No solo aprenderás la historia del Bitcoin y como funciona si no que también entenderas los principios y mecanismos que tiene detrás.

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The validity of each cryptocurrency's coins is provided by a blockchain. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography.[23][26] Each block typically contains a hash pointer as a link to a previous block,[26] a timestamp and transaction data.[27] By design, blockchains are inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way".[28] For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.
Ethereum's blockchain uses Merkle trees, for security reasons, to improve scalability, and to optimize transaction hashing.[60] As with any Merkle tree implementation, it allows for storage savings, set membership proofs (called "Merkle proofs"), and light client synchronization. The Ethereum network has at times faced congestion problems, for example, congestion occurred during late 2017 in relation to Cryptokitties.[61]

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In February 2014 the world's largest bitcoin exchange, Mt. Gox, declared bankruptcy. The company stated that it had lost nearly $473 million of their customers' bitcoins likely due to theft. This was equivalent to approximately 750,000 bitcoins, or about 7% of all the bitcoins in existence. The price of a bitcoin fell from a high of about $1,160 in December to under $400 in February.[67]
Las cadenas de bloques son seguras por diseño y son un ejemplo de sistema distribuido con un alta tolerancia a faltas bizantinas. El consenso descentralizado ha sido logrado gracias a la cadena de bloques. Las cadenas de bloques resuelven el problema de doble gasto sin la necesidad de una autoridad certificada o un servidor central, asumiendo que no se va a dar el ataque del 51% (que ha funcionado con varias criptomonedas).

Una criptomoneda, criptodivisa (del inglés cryptocurrency) o criptoactivo es un medio digital de intercambio que utiliza criptografía fuerte para asegurar las transacciones financieras, controlar la creación de unidades adicionales y verificar la transferencia de activos.1​2​3​ Las criptomonedas son un tipo de divisa alternativa y de moneda digital. Existe controversia respecto a que las criptomonedas tienen que ser de control descentralizado o monedas centralizadas por los bancos centrales u otra entidad.
LTCUSD down trend in full effect and Clubber Lang predicts more pain ahead. Death cross and now 100 EMA has crossed the 200 EMA on the 1D chart. Likely sideways movement at mid to lower $50s for a short period then breaching the upper $40s to do the same thing over again in the mid then the lower $40s thereafter. Can't see going much higher than low $60s in the...

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There are also purely technical elements to consider. For example, technological advancement in cryptocurrencies such as bitcoin result in high up-front costs to miners in the form of specialized hardware and software.[87] Cryptocurrency transactions are normally irreversible after a number of blocks confirm the transaction. Additionally, cryptocurrency private keys can be permanently lost from local storage due to malware, data loss or the destruction of the physical media. This prevents the cryptocurrency from being spent, resulting in its effective removal from the markets.[88]


As with other cryptocurrencies, the validity of each ether is provided by a blockchain, which is a continuously growing list of records, called blocks, which are linked and secured using cryptography.[30][31] By design, the blockchain is inherently resistant to modification of the data. It is an open, distributed ledger that records transactions between two parties efficiently and in a verifiable and permanent way.[32] Unlike Bitcoin, Ethereum operates using accounts and balances in a manner called state transitions. This does not rely upon unspent transaction outputs (UTXOs). State denotes the current balances of all accounts and extra data. State is not stored on the blockchain, it is stored in a separate Merkle Patricia tree. A cryptocurrency wallet stores the public and private "keys" or "addresses" which can be used to receive or spend ether. These can be generated through BIP 39 style mnemonics for a BIP 32 "HD Wallet". In Ethereum, this is unnecessary as it does not operate in a UTXO scheme. With the private key, it is possible to write in the blockchain, effectively making an ether transaction.

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Litecoin is a peer-to-peer Internet currency that enables instant, near-zero cost payments to anyone in the world. Litecoin is an open source, global payment network that is fully decentralized without any central authorities. Mathematics secures the network and empowers individuals to control their own finances. Litecoin features faster transaction confirmation times and improved storage efficiency than the leading math-based currency. With substantial industry support, trade volume and liquidity, Litecoin is a proven medium of commerce complementary to Bitcoin.

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Esta es una explicación técnica para todo el mundo de como realmente funcionan las criptomonedas, sus transacciones, mineria o minado, sus origenes, problemas y mucho más. ¿Como funciona la minería? ¿Vale la pena minar? No solo aprenderás la historia del Bitcoin y como funciona si no que también entenderas los principios y mecanismos que tiene detrás.
Transactions that occur through the use and exchange of these altcoins are independent from formal banking systems, and therefore can make tax evasion simpler for individuals. Since charting taxable income is based upon what a recipient reports to the revenue service, it becomes extremely difficult to account for transactions made using existing cryptocurrencies, a mode of exchange that is complex and difficult to track.[66]

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In the end, the majority of the Ethereum community voted to perform a hard fork, and retrieve The DAO investors money. But not everyone agreed with this course of action. This resulted in a split where two parallel blockchains now exist. For those members who strongly disagree with any changes to the blockchain even when hacking occurs there is Ethereum classic. For the majority who agreed to rewrite a small part of the blockchain and return the stolen money to their owners, there is Ethereum.  

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In May 2018, Bitcoin Gold (and two other cryptocurrencies) were hit by a successful 51% hashing attack by an unknown actor, in which exchanges lost estimated $18m.[citation needed] In June 2018, Korean exchange Coinrail was hacked, losing US$37 million worth of altcoin. Fear surrounding the hack was blamed for a $42 billion cryptocurrency market selloff.[72] On 9 July 2018 the exchange Bancor had $23.5 million in cryptocurrency stolen.[73]

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↑ «El Supremo dictamina que el bitcoin no es dinero y si se roba no se puede restituir» (html). El Periódico de Aragón. 4 de julio de 2019. Archivado desde el original el 5 de julio de 2019. Consultado el 5 de julio de 2019. «El alto tribunal considera que no puede tener consideración de moneda legal y, que por tanto, tampoco la tiene "a efectos de responsabilidad civil"».

Any services that are centralized can be decentralized using Ethereum. Think about all the intermediary services that exist across hundreds of different industries. From obvious services like loans provided by banks to intermediary services rarely thought about by most people like title registries, voting systems, regulatory compliance and much more.

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As the industry continues to investigate blockchain platforms, it’s apparent that Ethereum is becoming a de facto leader. For example, a few days ago JPMorgan publicly open-sourced its Quorum platform, architected and developed around the Go Ethereum client by Jeff Wilcke and his team. Several other major banks are using Ethereum, and Microsoft is anchoring its Bletchley platform on it as the foundational blockchain element. Industry, both publicly and confidentially, continues to contribute to Ethereum and work with us and others to help our promising, toddler-age codebase reach maturity. Stay tuned for news on this front.

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Here’s why. Ethereum is based on blockchain technology where all transactions are meant to be irreversible and unchangeable. By executing a hard fork and rewriting the rules by which the blockchain executes, Ethereum set a dangerous precedent that goes against the very essence of blockchain. If the blockchain is changed every time a large enough amount of money is involved, or enough people get negatively impacted, the blockchain will lose its main value proposition – secure, anonymous, tamper proof & unchangeable.

Both blockchains have the same features and are identical in every way up to a certain block where the hard-fork was implemented. This means that everything that happened on Ethereum up until the hard-fork is still valid on the Ethereum Classic Blockchain. From the block where the hard fork or change in code was executed onwards, the two blockchains act individually.

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Transactions that occur through the use and exchange of these altcoins are independent from formal banking systems, and therefore can make tax evasion simpler for individuals. Since charting taxable income is based upon what a recipient reports to the revenue service, it becomes extremely difficult to account for transactions made using existing cryptocurrencies, a mode of exchange that is complex and difficult to track.[66]

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En las redes de criptomonedas, el minado es una validación de las transacciones. Por este esfuerzo, los mineros obtienen unidades como recompensa. Esta recompensa disminuye las tarifas, creando un incentivo complementario para contribuir al poder de procesamiento de la red. El ratio de generar nuevos hashes que validan cualquier transacción ha ido aumentado por el uso de máquinas especializadas como FPGAs y ASICs. Esta carrera por máquinas baratas y eficientes ha existido desde los días de la primera criptomoneda, bitcoin, que fue introducida en 2009. Cuantas más personas se han ido aventurando en el mundo de las criptomonedas, la complejidad de la generación hashes ha ido aumentando a lo largo de los años, haciendo que los mineros tengan que invertir grandes cantidades de dinero en máquinas especializadas. Algunas veces, el valor de las unidades obtenidas no justificaban la inversión en máquinas, la refrigeración de estas y la energía consumida para hacerlas funcionar.20​

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La validez de cada una de las unidades está en la cadena de bloques. Una cadena de bloques es una lista en constante crecimiento de registros, llamados bloques, que son enlazados y asegurados usando criptografía. Cada bloque contiene un puntero hash enlazando a un bloque previo, una fecha y datos de transacciones. Por diseño, las cadenas de bloques son inherentemente resistentes a la modificación de los datos.

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^ "Bitcoin: The Cryptoanarchists' Answer to Cash". IEEE Spectrum. Archived from the original on 4 June 2012. Around the same time, Nick Szabo, a computer scientist who now blogs about law and the history of money, was one of the first to imagine a new digital currency from the ground up. Although many consider his scheme, which he calls "bit gold", to be a precursor to Bitcoin

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En los sistemas de criptomonedas, se garantiza la seguridad, integridad y equilibrio de sus estados de cuentas (contabilidad) por medio de un entramado de agentes (transferencia de archivo segmentada o transferencia de archivo multifuente) que se verifican (desconfían) mutuamente llamados mineros, que son, en su mayoría, público en general y protegen activamente la red (el entramado) al mantener una alta tasa de procesamiento de algoritmos, con la finalidad de tener la oportunidad de recibir una pequeña propina, que se reparte de manera aleatoria.5​

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Both blockchains have the same features and are identical in every way up to a certain block where the hard-fork was implemented. This means that everything that happened on Ethereum up until the hard-fork is still valid on the Ethereum Classic Blockchain. From the block where the hard fork or change in code was executed onwards, the two blockchains act individually.

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After much debate, the Ethereum community voted and decided to retrieve the stolen funds by executing what’s known as a hard fork or a change in code. The hard fork moved the stolen funds to a new smart contract designed to let the original owners withdraw their tokens. But this is where things get complicated. The implications of this decision are controversial and the topic of intense debate.
EthereumPrice.org was developed by Ether0x in March 2016 to allow users to easily track the price of Ethereum both historically and in real-time. The platform has since evolved to include several fiat currencies (EUR, GBP, JPY and others) as well as price data for a number of Ethereum ERC20 tokens and other blockchain currencies. More recently, prediction data from Augur was also added to provide insight into the future price expectations of the Ether market. Price data is currently sourced from multiple exchanges with the weighted average price of these assets being calculated by CryptoCompare.com. For more details on the weighted average calculation, see our FAQ.
As of May 2018, over 1,800 cryptocurrency specifications existed.[24] Within a cryptocurrency system, the safety, integrity and balance of ledgers is maintained by a community of mutually distrustful parties referred to as miners: who use their computers to help validate and timestamp transactions, adding them to the ledger in accordance with a particular timestamping scheme.[14]

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Paul Krugman, Nobel Memorial Prize in Economic Sciences winner does not like bitcoin, has repeated numerous times that it is a bubble that will not last[92] and links it to Tulip mania.[93] American business magnate Warren Buffett thinks that cryptocurrency will come to a bad ending.[94] In October 2017, BlackRock CEO Laurence D. Fink called bitcoin an 'index of money laundering'.[95] "Bitcoin just shows you how much demand for money laundering there is in the world," he said.

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The validity of each cryptocurrency's coins is provided by a blockchain. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography.[23][26] Each block typically contains a hash pointer as a link to a previous block,[26] a timestamp and transaction data.[27] By design, blockchains are inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way".[28] For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.

En febrero de 2018, el gobierno Chino detuvo el comercio con criptomonedas, prohibiendo la minería. Algunos mineros se han mudado a Canadá. Algunas empresas están usando centros de datos para la minería cerca de estaciones de gas canadienses, debido a los bajos precios. En junio de 2018, Hydro Quebec propuso al gobierno regional suministrar 500MW de potencia a compañías de minados. Según una noticia de febrero de 2018 de Fortune21​, Islandia se ha convertido en el "cielo" para los mineros, en parte por los precios de la electricidad, muy baratos. Los precios son estables debido a que están cerca de plantas energéticas de energías renovables, incitando a más compañías de minado a considerar el traslado de sus operaciones a Islandia. La compañía local de energía dice que el minado se está volviendo tan popular que el país usará más electricidad para el minado que para el suministro de energía a los hogares en 2018. En octubre de 2018, Rusia se convertirá en el anfitrión de una de las mayores granjas de minado en el mundo, localizada en Siberia.

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LTCUSD down trend in full effect and Clubber Lang predicts more pain ahead. Death cross and now 100 EMA has crossed the 200 EMA on the 1D chart. Likely sideways movement at mid to lower $50s for a short period then breaching the upper $40s to do the same thing over again in the mid then the lower $40s thereafter. Can't see going much higher than low $60s in the...

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After much debate, the Ethereum community voted and decided to retrieve the stolen funds by executing what’s known as a hard fork or a change in code. The hard fork moved the stolen funds to a new smart contract designed to let the original owners withdraw their tokens. But this is where things get complicated. The implications of this decision are controversial and the topic of intense debate.

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↑ «Decreto Constituyente sobre criptoactivos y la criptomoneda soberana Petro». Travieso Evans Com. Archivado desde el original el 16 de mayo de 2018. Consultado el 16 de mayo de 2018. «Artículo 6. El órgano de control y protección en materia de criptoactivos creada por el Ejecutivo Nacional, será la Superintendencia de la Criptomoneda y Actividades Conexas Venezolana, tendrá como función principal la de velar por el normal y legal funcionamiento de gestión que desarrollen las personas naturales o jurídicas que participen en el intercambio de la Criptomoneda venezolana Petro y demás criptoactivos creados por la República Bolivariana de Venezuela; dirigir el Sistema de registros de mineros virtuales, casas de intercambio y demás entes dedicados al ahorro y a la intermediación virtual en criptomonedas y criptoactivos; emitir los permisos y licencias; cobrar las tasas y tarifas que establezca; y en general, impulsar las medidas destinadas al desarrollo de los criptoactivos nacionales y su intercambio en el mercado nacional e internacional. La Superintendencia debe garantizar la protección de los derechos de las personas que participen en estas actividades.»

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