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Artigo muito interessante. Acho que poderia listar os algoritimos do proof of work. Já existem vários e é muitas vezes um diferencial de algumas cryptocurrencies.
Bitcoin = SHA-256
Dogecoin e litecoin = Scrypt
Zcash = Equihash/BLAKE2b
Monero = CryptoNight
Ethereum = Ethash
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Hi There, I'm the author of Revealer and the plugin.
Absolutely you can have a DIY revealer - just generate a digital revealer in the software and print out. In that case I would recommend a overhead foil and a laser print. You can try it today running Electrum from source. If you like it, you can buy some high quality from us and support the development of more out-of-the-box backup solutions.
Thanks for clarifying. This seems to be a major evolution of other non-hardware cold storage methods. In the long run, they seem to be the best solution. I found it even more interesting not to try to make a proprietary project. Having this DIY option is very interesting but still, I believe most will buy directly from you since the price is very good and the quality of the product also seems to be. The sealed envelope that is shipped together, can be used to protect the wallet? Is there any kind of recommendation on how to store to avoid any future problems? |
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Boa. Seria legal se colocasse tambem informações como a taxa para as ordens e coisas do tipo.
vlw. Acho que essas informações são mais práticas em sites mesmo, tipo o exchangewars. Ou planilhas como essa. É mais fácil atualizar por lá. Só eu acho válido colocar o tópico do Bug da Mercado Bitcoin?   Eu coloquei o link pro perfil do primeiro dono e pro tópico original. A ultima mensagem dele foi exatamente no tópico da confusão. 
Nem sabia que o Brasil tinha tantas exchanges. Parabéns pelo tópico.
Pois é. Quase ninguém conhece a maioria dessas. Por isso acho importante ter pelo menos uma referência que a empresa existe, não é apenas um site, e quem são os responsáveis. Se uma exchange se propõem a operar de maneira anónima, beleza, mas algumas colocam que o "time"é formado de especialistas bla bla bla, sem nenhuma referência onde se encontra a prova sobre essa especialidade. Eu tinha até começado a pesquisar pq pensava em enviar curriculo, mas nem pra isso a maioria não serve. Além disso dar uma cara é importante. Eu fico sempre desconfiado de pessoas com fotos apenas de terno e barba bem feita e com fotos de milhares de palestras. |
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Isso não é um erro. Existe um certo debate, mas o conceito foi introduzido pelo fundador da Peercoin, Sunny King, num paper. A ideia era diminuir os custos de energia com mineração. Não li o paper completo da Nano, mas o que entendo é que eles estão falando sobre quem introduziu a ideia. Não estão falando quem a utiliza 100% ou algo assim. NXT também teria criado um PoS depois do PPC. Seu criador atende pela alcunha de BCNext. Alguns meses atrás o Come-from-Beyond mostrou provas que ele seria, também, o BCNext. Não sei se foi desmentido. Come-from-Beyond se chama Sergey Ivancheglo e é o fundador da IOTA |
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RSK is working to implement smart contracts with Bitcoin. It will be the only one that will also reward the miners in bitcoins using merge-mining. An interesting fact is that they do not have a pre-mined token. https://www.rsk.co |
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What I understand is that their business would be based on the sale of this special PVC cards. And you will have to print in your printer your encrypt seeds from the plugin that is used on Electrum. Is it possible to DIY the Revealer Zero? What the card has of special?  |
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Pergunta: O que é uma Extended Public Key?
Uma carteira pode utilizar o BIP 32(hierarchical deterministic wallet) para gerar diversas chaves privadas e suas chaves publicas correspondentes de uma unica seed. A seed é chamada de masterextended key. Ou seja, são apenas chaves ECDSA normais e possuem uma chave privada da qual elas são derivadas. |
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Financial Times Up in San Francisco’s Monterey Heights district stands a modest detached house; a house that would be perfectly ordinary, were its wide windows not covered in neon green scribbles — half-finished equations, anatomies of computer architecture. They are marks left by the coders who use this place as a hide-out. The troupe of five or so developers, clad in hoodies and jeans, have an air of Peter Pan’s lost boys. They may be young — in their early to mid-twenties — but these programmers are the heart of the most extraordinary financial story of recent months: cryptocurrencies, digital tokens with no intrinsic value, suddenly worth billions. I’m here to meet the coders’ leader, Vitalik Buterin, the Russian-Canadian creator of Ethereum, arguably the most successful of the hundreds of copycat cryptocurrencies to have emerged in the seven years since bitcoin rose to prominence. On the damp, overcast morning earlier this year when I take a Lyft car (an Uber equivalent) to his San Francisco headquarters, Ethereum’s market value was some $125bn — second only to bitcoin. Once I’ve squeezed past his earnest acolytes, the angular young man I recognise from tech conference stages shakes my hand gingerly, his fingers flattened. With hollow cheeks and downy brown hair, he is more mathematics prodigy than tech magnate. We had booked a fancy Mexican restaurant in San Francisco’s Latin-inflected Mission district, but at the last minute I was told he would prefer a quiet takeaway here at Ethereum’s San Francisco home-from-home. He’s dressed in a loose canary yellow T-shirt featuring a cartoon character, black tracksuit trousers and a watch with a pink plastic strap. Its face is a cat, whose transparent Cheshire grin exposes the mechanism. I ask for his precise age. He answers without hesitation: “23.96”. It was his father Dmitry, also a computer scientist, who first introduced his son to the idea of blockchain and cryptocurrency. He had encouraged his son to build video games from the age of 10. Then in 2011 he told him about bitcoin. Created two years earlier as the world reeled from the failures of the banking system, bitcoin lets people exchange cash online without a bank mediating the transaction. Bitcoin’s enigmatic creator remains unidentified, but among its godfathers were cypherpunks: hackers dedicated to privacy, determined to undermine authorities who led us to the financial crisis. There’s projects that never had a soul, that are just like, ra-ra, price go up. Lambo[rghini], vrromm, buybuybuy now! The then 17-year-old Vitalik initially dismissed the idea, but then did his own research into virtual money. Soon he was writing articles — paid for in bitcoins — while studying computer science at Canada’s University of Waterloo, eventually leading him to co-found Bitcoin Magazine. Back in 2011, bitcoin was considered so radical many believed governments would ban it, pointing to the dark market it supported. Yet it survived, trading at highs of $19,000 at Christmas, although a crash followed. A blockchain is “an interesting and new kind of organism” Buterin says after we have slid across floorboards through the open-plan living room to a wooden dining table. That is something of an understatement, I think. Simply put, a blockchain is a ledger stored across thousands of computers. Spreading the record out this way, and securing it with Byzantine mathematics called cryptography, makes it harder to tamper with than traditional information hoards. Centralised data troves, such as your brain, are liable to lose things — and, as Equifax found via the hacking of its customer data files, are vulnerable to attack. By contrast, blockchain ledgers are open for all to read and not controlled by a single entity. Buterin’s particular genius was to see the potential to create a blockchain of his own, Ethereum, that other services could build on, from payments to games. It quickly grew a life of its own, with everyone from scientists to banks and entrepreneurs clamouring to build on it. Aged just 19, Buterin quit university to guide it.
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blombergIt took two economists one three-course meal and two bottles of wine to calculate the fair value of one Bitcoin: $200. It took an extra day for them to realize they were one decimal place out: $20, they decided, was the right price for a virtual currency that was worth $1,200 a year ago, flirted with $20,000 in December, and is still around $8,000. Setting aside the fortunes lost on it this year, Bitcoin, by their calculation, is still overvalued, to the tune of about 40,000 percent. The pair named this the Côtes du Rhône theory, after the wine they were drinking. “It’s how we get our best ideas. It’s the lubricant,” says Savvas Savouri, a partner at a London hedge fund who shared drinking and thinking duties that night with Richard Jackman, professor emeritus at the London School of Economics. Their quest is one shared by the legions of traders, techies, online scribblers, and gamblers and grifters mesmerized by Bitcoin. What’s the value of a cryptocurrency made of code with no country enforcing it, no central bank controlling it, and few places to spend it? Is it $2, $20,000, or $2 million? Can one try to grasp at rational analysis, or is this just the madness of crowds? Answering this question isn’t easy: Buying Bitcoin won’t net you any cash flows, or any ownership of the blockchain technology underpinning it, or really anything much at all beyond the ability to spend or save it. Maybe that’s why Warren Buffett once said the idea that Bitcoin had “huge intrinsic value” was a “joke”—there’s no earnings potential that can be used to estimate its value. But with $2 billion pumped into cryptocurrency hedge funds last year, there’s a lot of money betting the punchline is something other than zero. If Bitcoin is a currency, and currencies have value, surely some kind of stab—even in the dark—should be made at gauging its worth. Writing on a tablecloth, Jackman and Savouri turned to the quantity theory of money. Formalized by Irving Fisher in 1911, with origins that go back to Copernicus’s work on the effects of debasing coinage, the theory holds that the price of money is linked to its supply and how often it’s used. Here’s how it works. By knowing a money’s total supply, its velocity—the rate at which people use each coin—and the amount of goods and services on which it’s spent, you should be able to calculate price. Estimating Bitcoin’s supply at about 15 million coins (it’s currently a bit more), and assuming each one is used an average of about four times a year, led Jackman and Savouri to calculate that 60 million Bitcoin payments were supporting their assumed $1.2 billion worth of total U.S. dollar-denominated purchases. Using the theory popularized by Fisher and his followers, you can—simplifying things somewhat—divide the $1.2 billion by the 60 million Bitcoin payments to get the price of Bitcoin in dollars. That’s $20. So far, so straightforward. It turns out, however, that when it comes to putting a price on Bitcoin, the same equation can yield many different answers. In September, Dan Davies, an analyst at financial research firm Frontline Analysts Ltd., wrote up a “guesstimate” of Bitcoin’s value that he’d originally conducted in 2014 using—again—the quantity theory of money. He plugged in estimates for each variable and got about $600. On Dec. 10, Mark Kirker, a high school math teacher in California, published an analysis online using the same equation for the same purpose. He concluded that Bitcoin should be way above then-current levels. He’s since revised the number. Contacted by Bloomberg, he says it could be $15,000.
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Pergunta: Quando foi que Satoshi deu um fora no criador do EOS? E por qual razão?
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Não foi em 2010? O @jgarzik reportou nesse tópico. E algumas outras pessoas reportaram em outros locais. O Satoshi corrigiu 5 horas depois do primeiro report. |
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Message:
I am vit05, u=194811, on bitcointalk.org. Today is 18 april 2018.
address:
12bkmQvUMZUrshEhZPDECbYXgArvTQJGh8
signature:
II2cCgdKt2OlHSVkPJu1/ih4a9vvNnz6ol5qiVXFUmauFo6t+DlwUKwBDYdR1d4XgpgXTvIsyuIE4077WIPrCMM=
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And the responsibility of the projects that hire these promoters? What I understand is that there is an industry using multiple accounts to promote these actions. If a project constantly receives comments like this that you put as spam, it is clear that the leaders of this project have hired the services of these companies.
Would not it be more practical, also have a list of the projects that receive the most comments and a list of promoters whose promoted projects receive more comments of this type? I do not know what action could be taken on these users. Maybe a new rule prohibiting the use of these services.
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New York Attorney General Eric Schneiderman launched an investigation into bitcoin exchanges today, his office announced. He’s looking into thirteen major exchanges, including Coinbase, Gemini Trust, and Bitfinex, requesting information on their operations and what measures they have in place to protect consumers. “Too often, consumers don’t have the basic facts they need to assess the fairness, integrity, and security of these trading platforms,” Schneiderman said in a statement. His office sent detailed questionnaires to the thirteen exchanges, asking them to disclose who owns and controls them, and how their basic operation and transaction fees work. The questionnaire also asks for specific details on how exchanges might suspend trading or delay orders, indicating Schneiderman is particularly concerned with exchanges manipulating the timing of public orders. The investigation will attempt to shed more transparency on how platforms combat market manipulation attempts and suspicious trading, as well as bots, theft, and fraud. Many of the exchanges Schneiderman is targeting, such as Beijing-based Huobi, have headquarters located outside the US, but the attorney general has jurisdiction over any foreign business operating in New York. Exchanges have been subject to plenty of glitches, robberies, and more. In February, some Coinbase users noted that they were getting double charged for legitimate transactions and their accounts were being emptied, which resulted in overdraft fees. Mt. Gox, an exchange in Japan, infamously had all of its bitcoin slowly drained out of its accounts by a hacker and had to file for bankruptcy in February 2014 as a result. theVerge |
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