Deputy Attorney General Lisa Monaco said investigators had seized UL after last month's hack of its systems that led to massive shortages at U. East Coast gas stations. The Justice Department has "found and recaptured the majority" of the ransom paid by Colonial, Monaco said.
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- Bitcoin and other cryptocurrencies are just getting started, says Spark Capital’s Megan Quinn
- The man who oversaw YouTube Gaming’s huge streamer deals is leaving for crypto
- Cryptocurrency cynics stand to profit the most
- Russian Crypto Scammers Targeting YouTube, Google Researchers Warn
- Bitcoin Exchanges Flood London's Metro With Adverts
- Vast system of underground vaults for the rich said to hoard $10-billion of Bitcoin
Bitcoin and other cryptocurrencies are just getting started, says Spark Capital’s Megan Quinn
A cryptocurrency , crypto-currency , or crypto is a digital currency designed to work as a medium of exchange through a computer network that is not reliant on any central authority, such as a government or bank , to uphold or maintain it.
Individual coin ownership records are stored in a digital ledger , which is a computerized database using strong cryptography to secure transaction records, to control the creation of additional coins, and to verify the transfer of coin ownership. In a proof-of-stake model, owners put up their tokens as collateral. In return, they get authority over the token in proportion to the amount they stake.
Generally, these token stakers get additional ownership in the token over time via network fees, newly minted tokens or other such reward mechanisms. Cryptocurrency does not exist in physical form like paper money and is typically not issued by a central authority.
Cryptocurrencies typically use decentralized control as opposed to a central bank digital currency CBDC. When implemented with decentralized control, each cryptocurrency works through distributed ledger technology, typically a blockchain , that serves as a public financial transaction database.
A cryptocurrency is a tradable digital asset or digital form of money, built on blockchain technology that only exists online. Cryptocurrencies use encryption to authenticate and protect transactions, hence their name. There are currently over a thousand different cryptocurrencies in the world, and their supporters see them as the key to a fairer future economy.
Bitcoin , first released as open-source software in , is the first decentralized cryptocurrency. In , the American cryptographer David Chaum conceived an anonymous cryptographic electronic money called ecash. This allowed the digital currency to be untraceable by the issuing bank, the government, or any third party. In , Wei Dai published a description of "b-money", characterized as an anonymous, distributed electronic cash system.
In , the first decentralized cryptocurrency, bitcoin, was created by presumably pseudonymous developer Satoshi Nakamoto. It used SHA , a cryptographic hash function, in its proof-of-work scheme. Soon after, in October , Litecoin was released.
It used scrypt as its hash function instead of SHA On 6 August , the UK announced its Treasury had commissioned a study of cryptocurrencies, and what role, if any, they could play in the UK economy. The study was also to report on whether regulation should be considered. In June , El Salvador became the first country to accept Bitcoin as legal tender , after the Legislative Assembly had voted 62—22 to pass a bill submitted by President Nayib Bukele classifying the cryptocurrency as such.
In August , Cuba followed with Resolution to recognize and regulate cryptocurrencies such as bitcoin. In September , the government of China , the single largest market for cryptocurrency, declared all cryptocurrency transactions illegal, completing a crackdown on cryptocurrency that had previously banned the operation of intermediaries and miners within China.
According to Jan Lansky, a cryptocurrency is a system that meets six conditions: . In March , the word cryptocurrency was added to the Merriam-Webster Dictionary. Tokens, cryptocurrencies, and other types of digital assets that are not bitcoin are collectively known as alternative cryptocurrencies,    typically shortened to "altcoins" or "alt coins",   or disparagingly known as "shitcoins".
The term is commonly used to describe coins and tokens created after bitcoin. Altcoins often have underlying differences with bitcoin. For example, Litecoin aims to process a block every 2. Significant rallies across altcoin markets are often referred to as an "altseason".
Stablecoins are altcoins that are designed to maintain a stable level of purchasing power. Decentralized cryptocurrency is produced by the entire cryptocurrency system collectively, at a rate which is defined when the system is created and which is publicly known.
In centralized banking and economic systems such as the US Federal Reserve System , corporate boards or governments control the supply of currency. The underlying technical system upon which decentralized cryptocurrencies are based was created by the group or individual known as Satoshi Nakamoto.
As of May [update] , over 1, cryptocurrency specifications existed. Most cryptocurrencies are designed to gradually decrease the production of that currency, placing a cap on the total amount of that currency that will ever be in circulation.
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.
It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". 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.
Blockchains are secure by design and are an example of a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been achieved with a blockchain. In the world of cryptocurrency, a node is a computer that connects to a cryptocurrency network.
The node supports the relevant cryptocurrency's network through either; relaying transactions, validation or hosting a copy of the blockchain. In terms of relaying transactions each network computer node has a copy of the blockchain of the cryptocurrency it supports, when a transaction is made the node creating the transaction broadcasts details of the transaction using encryption to other nodes throughout the node network so that the transaction and every other transaction is known.
Node owners are either volunteers, those hosted by the organisation or body responsible for developing the cryptocurrency blockchain network technology, or those who are enticed to host a node to receive rewards from hosting the node network. Cryptocurrencies use various timestamping schemes to "prove" the validity of transactions added to the blockchain ledger without the need for a trusted third party. The first timestamping scheme invented was the proof-of-work scheme.
The most widely used proof-of-work schemes are based on SHA and scrypt. The proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions. The scheme is largely dependent on the coin, and there's currently no standard form of it.
Some cryptocurrencies use a combined proof-of-work and proof-of-stake scheme. In cryptocurrency networks, mining is a validation of transactions. For this effort, successful miners obtain new cryptocurrency as a reward.
The reward decreases transaction fees by creating a complementary incentive to contribute to the processing power of the network. With more people venturing into the world of virtual currency, generating hashes for validation has become more complex over time, forcing miners to invest increasingly large sums of money to improve computing performance. Consequently, the reward for finding a hash has diminished and often does not justify the investment in equipment and cooling facilities to mitigate the heat the equipment produces , and the electricity required to run them.
As of July [update] , bitcoin's electricity consumption is estimated to about 7 gigawatts, 0. Some miners pool resources , sharing their processing power over a network to split the reward equally, according to the amount of work they contributed to the probability of finding a block.
A "share" is awarded to members of the mining pool who present a valid partial proof-of-work. As of February [update] , the Chinese Government has halted trading of virtual currency, banned initial coin offerings and shut down mining. Many Chinese miners have since relocated to Canada  and Texas. In March , the city of Plattsburgh in upstate New York put an month moratorium on all cryptocurrency mining in an effort to preserve natural resources and the "character and direction" of the city.
An increase in cryptocurrency mining increased the demand for graphics cards GPU in Miners regularly buy up the entire stock of new GPU's as soon as they are available. Nvidia has asked retailers to do what they can when it comes to selling GPUs to gamers instead of miners. A cryptocurrency wallet stores the public and private "keys" address or seed which can be used to receive or spend the cryptocurrency.
With the public key, it is possible for others to send currency to the wallet. There exist multiple methods of storing keys or seed in a wallet from using paper wallets which are traditional public, private or seed keys written on paper to using hardware wallets which are dedicated hardware to securely store your wallet information, using a digital wallet which is a computer with a software hosting your wallet information, hosting your wallet using an exchange where cryptocurrency is traded.
Bitcoin is pseudonymous rather than anonymous in that the cryptocurrency within a wallet is not tied to people, but rather to one or more specific keys or "addresses". Still, cryptocurrency exchanges are often required by law to collect the personal information of their users. Additions such as Monero , Zerocoin , Zerocash and CryptoNote have been suggested, which would allow for additional anonymity and fungibility.
Cryptocurrencies are used primarily outside existing banking and governmental institutions and are exchanged over the Internet.
Proof-of-work cryptocurrencies, such as bitcoin, offer block rewards incentives for miners. There has been an implicit belief that whether miners are paid by block rewards or transaction fees does not affect the security of the blockchain, but a study suggests that this may not be the case under certain circumstances.
The rewards paid to miners increase the supply of the cryptocurrency. By making sure that verifying transactions is a costly business, the integrity of the network can be preserved as long as benevolent nodes control a majority of computing power. The verification algorithm requires a lot of processing power, and thus electricity in order to make verification costly enough to accurately validate public blockchain.
Not only do miners have to factor in the costs associated with expensive equipment necessary to stand a chance of solving a hash problem, they further must consider the significant amount of electrical power in search of the solution. Generally, the block rewards outweigh electricity and equipment costs, but this may not always be the case. The current value, not the long-term value, of the cryptocurrency supports the reward scheme to incentivize miners to engage in costly mining activities.
Some sources claim that the current bitcoin design is very inefficient, generating a welfare loss of 1. However, the efficiency of the bitcoin system can be significantly improved by optimizing the rate of coin creation and minimizing transaction fees. Another potential improvement is to eliminate inefficient mining activities by changing the consensus protocol altogether. Transaction fees for cryptocurrency depend mainly on the supply of network capacity at the time, versus the demand from the currency holder for a faster transaction.
For Ether , transaction fees differ by computational complexity, bandwidth use, and storage needs, while bitcoin transaction fees differ by transaction size and whether the transaction uses SegWit. Some cryptocurrencies have no transaction fees, and instead rely on client-side proof-of-work as the transaction prioritization and anti-spam mechanism.
Cryptocurrency exchanges allow customers to trade cryptocurrencies  for other assets, such as conventional fiat money , or to trade between different digital currencies. Atomic swaps are a mechanism where one cryptocurrency can be exchanged directly for another cryptocurrency, without the need for a trusted third party such as an exchange. The kiosk installed in Austin, Texas, is similar to bank ATMs but has scanners to read government-issued identification such as a driver's license or a passport to confirm users' identities.
An initial coin offering ICO is a controversial means of raising funds for a new cryptocurrency venture. An ICO may be used by startups with the intention of avoiding regulation. However, securities regulators in many jurisdictions, including in the U. In an ICO campaign, a percentage of the cryptocurrency usually in the form of "tokens" is sold to early backers of the project in exchange for legal tender or other cryptocurrencies, often bitcoin or Ether.
According to PricewaterhouseCoopers , four of the 10 biggest proposed initial coin offerings have used Switzerland as a base, where they are frequently registered as non-profit foundations. The Swiss regulatory agency FINMA stated that it would take a "balanced approach" to ICO projects and would allow "legitimate innovators to navigate the regulatory landscape and so launch their projects in a way consistent with national laws protecting investors and the integrity of the financial system.
The "market cap" of any coin is calculated by multiplying the price by the number of coins in circulation.
The man who oversaw YouTube Gaming’s huge streamer deals is leaving for crypto
These videos of crypto YouTube channels can help you understand the cryptocurrency market and how to invest in cryptocurrency. This is one of the crypto YouTube channels in India that has a lot of the latest content for blockchain enthusiasts. It also has analysis videos of the crypto market too. The crypto YouTube channel has current news of the cryptocurrency and its market. It also contains reviews, news, and tips relating to cryptocurrency and blockchain. Bitcoin Expert India is also one of the top crypto YouTube channels in India that provides credible information on all the cryptocurrency and related markets. This is one of the most trusted crypto YouTube channels in India.
Cryptocurrency cynics stand to profit the most
Founded by Halsey Minor , the VideoCoin project contends for a spot on the playing field. BitTube provides a system to enable video content producers to publish work free from censorship. The platform also eliminates the need for centralized storage companies. And significantly, the system eliminates the dependence on selling advertising to earn revenue. And among these goals, decentralization provides the primary benefit to distinguish BitTube as the Bitcoin YouTube. This takes control of user data out of the hands of centralized storage companies, and it returns that control to the users. Consequently, data resides not at a physically fixed address but is transferred to a global server network.
Russian Crypto Scammers Targeting YouTube, Google Researchers Warn
The best crypto YouTube channels on this list are based on their educational content, so you can avoid the hype and get straight to the facts. Ok, might be a little bit bias on this one. Tune in to learn about decentralized finance and NFTs, and how you can make profits in the ever-growing Web3 space. Benjamin Cowen is hands-down the best cryptocurrency YouTuber for technical analysis. The YouTuber focuses on the data science behind price movements and he offers an unbiased view of the crypto markets.
Bitcoin Exchanges Flood London's Metro With Adverts
Subscriber Account active since. A video shows the moment a bitcoin ATM spat cash all over a busy tube station in London when a customer withdrew more than the machine could deal with. The notes come out of the machine so quickly that they fall in different directions on the ground, creating a wide pool on the station floor. The man withdrawing the money is seen with an open bag that looks to be filled with the bank notes under the machine, but many fall on either side of the bag. He then rearranges the fallen notes into a pile with his feet, looking sheepish and occasionally laughing as they continue to fly out of the machine.
Vast system of underground vaults for the rich said to hoard $10-billion of Bitcoin
Cybercriminals in underground forums have been soliciting techniques for compromising cryptocurrency services. Capture the Flag competitions, conference calls for papers, and gamification in cybersecurity courses designed to equip learners with hands-on skills are all common in the white hat realm, but in opposition, contests are also being launched by cybercriminals to create new offensive techniques. Over the past month, according to Intel , operators of Russian underground forums have been running a competition asking for papers that examine "how to target cryptocurrency-related technology. Starting April 20, the contest requests unorthodox methods covering everything from the theft of private keys and wallets used to store cryptocurrency including Bitcoin BTC and Ethereum ETH to submissions for "unusual" cryptocurrency mining software, as well as proposals relating to smart contracts and non-fungible tokens NFTs. Some papers were posted for the wider forum to appraise, including ways to manipulate APIs used by cryptocurrency platforms, the use of phishing websites to harvest keys and seed phrases, and more. Underground forum contents are nothing new, and similar forums have launched their own versions in the past asking for everything from software vulnerabilities to ATM and point-of-sale PoS exploits. However, the cryptocurrency-focused contest does highlight how the virtual alternative to fiat currency is lucrative -- despite, or perhaps because of, the volatility of some coins -- and not just because of how cryptocurrency is abused by ransomware operators. A security researcher kept a major Bitcoin Core vulnerability secret for two years that could be used to crash the main BTC blockchain alongside Bcoin, Btcd, and similar blockchains.
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This My Bitcoin Tube review is a warning against this fraudulent system that wants to cheat you. This service claims that you can make money by watching videos. But after how long? Youtubers need hundreds of thousands of views to earn that kind of money with their videos. This is just a fact which leads to an inevitable conclusion: myBitcoinTube is a scam, there is no other possibility.
In October, Brian Jung, a year-old YouTube creator, posted his first video analyzing Shiba Inu, a canine-themed digital token, which was soaring in value. Jung, who would go on to make two more Shiba Inu videos within the week, is part of a new, prominent crop of hyper active video producers riding the roller-coaster of digital currencies into the mainstream while getting rich en route, or trying to. Day after day, they post recorded videos and livestreams about coins, digital wallets, meme stocks and blockchains.