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Proof of stake
| Глоссарий по криптовалютам и блокчейну |
Proof-of-stake (pos) is a method by which a cryptocurrency blockchain network aims to achieve distributed consensus. while the proof-of-work (pow) method asks users to repeatedly run hashing algorithms or other client puzzles, to validate electronic transactions, proof-of-stake asks users to prove ownership of a certain amount of currency (their “stake” in the currency). peercoin was the first cryptocurrency to launch using proof-of-stake. other prominent implementations are found in bitshares, nxt, blackcoin, nushares/nubits and qora. ethereum has planned a hard fork transition from pow to pos consensus. decred hybridizes pow with pos and combines elements of both in an attempt to garner the benefits of the two systems and create a more robust notion of consensus. with proof of work, the probability of mining a block depends on the work done by the miner (e.g. cpu/gpu cycles spent checking hashes). in the case of bitcoin, with proof of stake, the resource that’s compared is the amount of bitcoin a miner holds – someone holding 1% of the bitcoin can mine 1% of the “proof of stake blocks”. instead of sacrificing energy to mine a block, a user must prove they own a certain amount of the cryptocurrency to generate a block. the more stake you own, the more likely you are to generate a block. in theory, this should prevent users from creating forks because it will devalue their stake and it should save a lot of energy. proof of stake sounds like a good idea, but ironically, there is the “nothing at stake” problem. since mining bitcoins is costly, it is not smart to waste your energy on a fork that won’t earn you any money, however with proof of stake, it is free to mine a fork
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Proof, английский
- Any fact or evidence that leads to a judgment of the court
- A printed sample of work to be checked for errors in text, positioning or quality of colour reproduction.
- Доказательство
- The trial of the quality of arms, ammunition, &c., before their reception for service. guns are proved by various examinations, and by the firing of prescribed charges; powder by examinations, and by carefully measured firings from each batch.
- [1] to test a gun by firing it. [2] an arbitrary benchmark used by the distillery industry to rate the strength of an alcoholic liquor against a standard of 100 (defined as representing 50 percent alcohol by volume).
Proof, английский
Proof battleships, английский
Proof coin, английский
Монета из первой партии (для коллекционеров, торговцев и т.п.)
Proof container, английский
- Коробка для безопасного уничтожения острых медицинских отходов (кбу) предназначена для сбора и уничтожения острых предметов и инструментария; представляет собой непрокалываемую ёмкость, в которую помещают шприцы и иглы сразу после их использования для временного хранения до уничтожения.
- Контейнер для хранения отработанных острых предметов и инструментария см. также safety box (контейнер безопасности).
Proof listing, английский
Контрольный листинг; контрольная распечатка
Proof load, английский
A predetermined load, generally some multiple of the service load, to which a specimen or structure is submitted before acceptance for use.
Proof of, английский
Proof of address, английский
Proof of age, identity, citizenship or legal residence status, английский
Подтверждение возраста, личности, гражданства или законного права на жительства
Proof of authority(poa), английский
A proof of authority is a consensus mechanism in a private blockchain which essentially gives one client(or a specific number of clients) with one particular private key the right to make all of the blocks in the blockchain
Proof of concept, английский
The verification that the selected technology performs according to pre-established criteria in a lab environment designed to simulate the production environment.
Proof of concept (poc) phase, английский
A small exercise to test a discrete design idea or assumption (see figures 22-24).
Proof of delivery, английский
Proof of knowledge, английский
Proof of novelty, английский
Доказательство новизны (изобретения)
Proof of purchase, английский
- Регистрационная карточка
- The original receipt or other document which confirms acquisition of a particular product.
Proof of service, английский
A form filed with the court that proves that court papers were properly delivered to someone
Proof of work, английский
- Pow system/protocol/function is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer. the concept may have been first presented by cynthia dwork and moni naor in a 1993 journal. the term “proof of work” was first coined and formalized in a 1999 paper by markus jakobsson and ari juels. a key feature of these schemes is their asymmetry: the work must be moderately hard (but feasible) on the requester side but easy to check for the service provider. this idea is also known as a cpu cost function, client puzzle, computational puzzle or cpu pricing function
- One important property of a block in bitcoin, ethereum and many other crypto-ledgers is that the hash of the block must be smaller than some target value. the reason this is necessary is that in a decentralized system anyone can produce blocks, so in order to prevent the network from being flooded with blocks, and to provide a way of measuring how much consensus there is behind a particular version of the blockchain, it must in some way be hard to produce a block. because hashes are pseudorandom, finding a block whose hash is less than takes an average of 4.3 billion attempts. in all such systems, the target value self-adjusts so that on average one node in the network finds a block every n minutes (eg. n = 10 for bitcoin and 1 for ethereum).
Proof of work nonce, английский
A meaningless value in a block which can be adjusted in order to try to satisfy the proof of work condition
Cryptocurrency, английский
A form of digital currency based on mathematics, where encryption techniques are used to regulate the generation of units of currency and verify the transfer of funds. furthermore, cryptocurrencies operate independently of a central bank.
Blockchain, английский
- A blockchain is a type of distributed ledger, comprised of unchangable, digitally recorded data in packages called blocks (rather like collating them on to a single sheet of paper). each block is then ‘chained’ to the next block, using a cryptographic signature. this allows block chains to be used like a ledger, which can be shared and accessed by anyone with the appropriate permissions.
- Shared, trusted, public ledger of transactions, that everyone can inspect but which no single user controls. it is a cryptographed, secure, tamper resistant distributed database. it solves a complex mathematical problem to exist. a blockchain is a perfect place to store value, identities, agreements, property rights, credentials, etc. once you put something like a bitcoin into it, it will stay there forever. it is decentralized, disintermediated, cheap and censorship resistant. applications of blockchain: bitcoin (cryptocurrency), namecoin (wants to replace the entire dns system of the internet), or sia (a decentralized cloud storage), ethereum (turing complete virtual machine where you can run any smart contract); any centralized service like ebay, dropbox can potentially be built in a decentralized way using blockchain technology, considerably lowering transaction costs
- Think of blockchain as a database or a spreadsheet. but a really special spreadsheet. there`s no centralized master copy. instead, it`s shared on many computers. it`s special because you can only add to it. there`s no editing of history. the database is divided into chronological sub-sheets. these are the blocks. the last line of any block summarizes all of the data in the block, and ч and this is pretty important ч appears as the first line of the next block. if anyone tries to edit a block, the last line will change and will not match the first line of the next block. the network sees this corrupted block and immediately replaces it. this ingenious trick makes it futile to rewrite history and guarantees an unprecedented degree of security. blockchain was invented by haber and stornetta in 1991 but made famous in the satoshi nakamoto`s bitcoin paper.
Distributed, английский
- Распредел
- Распределенный; рассредоточенный
- Сотри t i ng en v i ronmen t распределенные вычисления
- New treasury issues in dealers` hands are said to be distributed.
Repeatedly, английский
Algorithms, английский
Complex mathematical formulae or rules used to solve complex problems in cctv they are used to achieve digital compression of a video picture.
Electronic, английский
- Associates, incorporated фирма «электроник ассо- шиитс инкорпорейтед»
- Communications, incorporated фирма «электронике комьюникейшнз инкорпорейтед»
- Devices, incorporated фирма «электроник дивайсиз :ин- корпорейтед»
- Электронный
- [emergency] locator transmitter аварийный радиомаяк
- One of the music genres that appears under genre classification in windows media player library. based on id3 standard tagging format for mp3 audio files. id3v1 genre id # 52.
Transactions, английский
Операции (в снс; понятия, относящиеся к реализации товаров и услуг экономическими единицами, получающими за это определенную компенсацию; по характеру объектов подразделяются на текущие, т. е. предназначенные для немедленного использования или потребления, и капитальные операции, т. е. по увеличению национального богатства)
Transition, английский
- Переучивание; переподготовка
- N переход closed ~ закрытый слог (ант. open ~) normal ~ обычный переход open ~ открытый переход (ант. closed ~) percussive ~ ударный переход
- Переход от пластичного состояния к хрупкому
- A change in gait.
- Upward or downward change between gaits, speed, direction, or maneuvers.
- A move from one license, product, or license model to another. some examples of transitions are: a step-up to a higher edition; a move from on-premises to the cloud, or cloud to on-premises; or a move to or from a license model that is a hybrid of an online service and an on-premises product.
- An allowed path from one state to another.
- An animation effect that specifies how the display changes as a user moves from one item (such as a slide or web page) to another.
- In a statechart or activity diagram, a relationship between two states or action states or between a state and itself.
- Переход
Probability, английский
- Probability can be generally defined as a measure of how likely some event will occur. the event could be an explosion, a lottery win or perhaps cancer induction. mathematically speaking, the value of probability varies between 0 and 1 where 0 means an ev
- Вероятность. возможность.
- The probability of an event is a number between zero and 100%. the meaning (interpretation) of probability is the subject of theories of probability, which differ in their interpretations. however, any rule for assigning probabilities to events has to satisfy the axioms of probability.
- Вероятность
- Вероятность probability sample, syn. random sample
- Вероятность. мера случайности появления конкретного события. например, вероятность случайного выбора из популяции человека с конкретным качеством соответствует доле людей в популяции, обладающих этим качеством.
- Вероятность; возможность
- Вероятность; обеспеченность (гидрологической величины) ~ of no-failure вероятность безотказной работы
- Probability is a method for representing uncertainty about propositions or events. it represents the uncertainty about a proposition on a scale from 0 to 1, with a 0 representing complete certainty that the proposition is false or an event will not occur and a value of one will represent the opposite. formally, a probability measure is one that follows kolmogorov`s axioms. there are two main schools of thought on the meaning of probability. frequentists take a narrow interpretation of probability allowing only hypothetically repeatable events or experiments as being quantifiable by probability, while bayesians take a broader interpretation that allows reasoning about "one-shot" events and propositions based on the current knowledge about nature. the bayesian interpretation is most commonly used in artificial intelligence, while the frequentist interpretation is most commonly taught in statistics courses. the label "bayesian" arises from the central role that the bayes theorem plays in this use of probability. it allows one to reason from effects to causes and encourages the use of probability measures to describe supposedly fixed events or propositions which frequentists disallow. the probability for these events reflects one`s state of knowledge about the event, rather than being an assertion that the unknown event can vary. for example, a bayesian would have no qualms about making statements about the probability that a given die, rolled and hidden from his sight is, for example, a six. a frequentist would be unable to make such a statement, preferring to talk about his confidence in the method when applied to a hypothetically large number of repeated experiments. in the end, they would act in similar ways. when the long run data are available, bayesians and frequentists end up with the same estimates. see also: bayes theorem, kolmogorov`s axioms.
- Вероятность. математическое измерение возможности появления неко-его события, выраженное в виде дроби или процента [30]. значения статистической вероятности лежат в пределах от 1 или 100 процентов (всегда) до 0 или 0 процентов (никогда) [20]. наибольшее приближение к истинной вероятности дает относитель-ная частота события, полученная на основе большой серии измерений или результа-тов [33]. вероятность может быть также определена как выражение в некоторой неопределимой форме "степени уверенности" или как предельная частота события в бесконечной случайной последовательности [49].
- The likelihood of something happening. for example, sale being made.
- Вероятность. математическое измерение возможности появления некоего события, выраженное в виде дроби или процента [30]. значения статистической вероятности лежат в пределах от 1 или 100 процентов (всегда) до 0 или 0 процентов (никогда) [20]. наибольшее приближение к истинной вероятности дает относительная частота события, полученная на основе большой серии измерений или результатов [33]. вероятность может быть также определена как выражение в некоторой неопределимой форме "степени уверенности" или как предельная частота события в бесконечной случайной последовательности [49].
- The relative likelihood of a particular outcome among all possible outcomes.
- Likelihood that an event may occur, expressed as a number between 0 and 1.
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Ring signature, английский
Ring signature is a cryptographic technology that could provide a decent level of anonymisation on a blockchain. ring signatures make sure individual transaction outputs on the blockchain can’t be traced. a message signed with a ring signature is endorsed by someone in a particular group of people. one of the security properties of a ring signature is that it should be computationally infeasible to determine which of the group members’ keys was used to produce the signature
Proof of work, английский
- Pow system/protocol/function is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer. the concept may have been first presented by cynthia dwork and moni naor in a 1993 journal. the term “proof of work” was first coined and formalized in a 1999 paper by markus jakobsson and ari juels. a key feature of these schemes is their asymmetry: the work must be moderately hard (but feasible) on the requester side but easy to check for the service provider. this idea is also known as a cpu cost function, client puzzle, computational puzzle or cpu pricing function
- One important property of a block in bitcoin, ethereum and many other crypto-ledgers is that the hash of the block must be smaller than some target value. the reason this is necessary is that in a decentralized system anyone can produce blocks, so in order to prevent the network from being flooded with blocks, and to provide a way of measuring how much consensus there is behind a particular version of the blockchain, it must in some way be hard to produce a block. because hashes are pseudorandom, finding a block whose hash is less than takes an average of 4.3 billion attempts. in all such systems, the target value self-adjusts so that on average one node in the network finds a block every n minutes (eg. n = 10 for bitcoin and 1 for ethereum).
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