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Proof Of Stake
Proof-of-stake (PoS) protocols are a class of consensus mechanisms for blockchains that work by selecting validators in proportion to their quantity of holdings in the associated cryptocurrency. This is done to avoid the computational cost of proof-of-work (POW) schemes. The first functioning use of PoS for cryptocurrency was Peercoin in 2012, although its scheme, on the surface, still resembled a POW. Description For a blockchain transaction to be recognized, it must be appended to the blockchain. In the proof of stake blockchain, the appending entities are named ''minters'' or (in the proof of work blockchains this task is carried out by the miners); in most protocols, the validators receive a reward for doing so. For the blockchain to remain secure, it must have a mechanism to prevent a malicious user or group from taking over a majority of validation. PoS accomplishes this by requiring that validators have some quantity of blockchain tokens, requiring potential attack ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Consensus (computer Science)
A fundamental problem in distributed computing and multi-agent systems is to achieve overall system reliability in the presence of a number of faulty processes. This often requires coordinating processes to reach consensus, or agree on some data value that is needed during computation. Example applications of consensus include agreeing on what transactions to commit to a database in which order, state machine replication, and atomic broadcasts. Real-world applications often requiring consensus include cloud computing, clock synchronization, PageRank, opinion formation, smart power grids, state estimation, control of UAVs (and multiple robots/agents in general), load balancing, blockchain, and others. Problem description The consensus problem requires agreement among a number of processes (or agents) on a single data value. Some of the processes (agents) may fail or be unreliable in other ways, so consensus protocols must be fault-tolerant or resilient. The processes must p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finality (blockchain)
The blockchain is a distributed ledger with growing lists of Record (computer science), records (''blocks'') that are securely linked together via Cryptographic hash function, cryptographic hashes. Each block contains a cryptographic hash of the previous block, a Trusted timestamping, timestamp, and transaction data (generally represented as a Merkle tree, where Node (computer science), data nodes are represented by leaves). Since each block contains information about the previous block, they effectively form a ''chain'' (compare linked list data structure), with each additional block linking to the ones before it. Consequently, blockchain transactions are resistant to alteration because, once recorded, the data in any given block cannot be changed retroactively without altering all subsequent blocks and obtaining network consensus to accept these changes. Blockchains are typically managed by a peer-to-peer, peer-to-peer (P2P) computer network for use as a public distributed led ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Security (finance)
A security is a tradable financial asset. The term commonly refers to any form of financial instrument, but its legal definition varies by jurisdiction. In some countries and languages people commonly use the term "security" to refer to any form of financial instrument, even though the underlying legal and regulatory regime may not have such a broad definition. In some jurisdictions the term specifically excludes financial instruments other than equity and fixed income instruments. In some jurisdictions it includes some instruments that are close to equities and fixed income, e.g., equity warrants. Securities may be represented by a certificate or, more typically, they may be "non-certificated", that is in electronic ( dematerialized) or " book entry only" form. Certificates may be ''bearer'', meaning they entitle the holder to rights under the security merely by holding the security, or ''registered'', meaning they entitle the holder to rights only if they appear on a securi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortune
Fortune may refer to: General * Fortuna or Fortune, the Roman goddess of luck * Luck * Wealth * Fate * Fortune, a prediction made in fortune-telling * Fortune, in a fortune cookie Arts and entertainment Film and television * ''The Fortune'' (1931 film), a French film * '' The Fortune'', a 1975 American film * ''Fortune'' (film), a 2022 Tajik film * Fortune TV, Burma * '' Fortune: Million Pound Giveaway'', a 2007 UK TV programme * "Fortune" (''Smallville''), a US TV episode Music * Fortune Records, 1946–1995 * Fortune (band), 1980s, US * The Fortunes, an English harmony beat group * ''Fortune'' (Beni album), 2011 * ''Fortune'' (Callers album) and its title song, 2008 * ''Fortune'' (Chris Brown album), 2012 * "Fortune" (song), by Nami Tamaki, 2005 * "Fortune", a song by Emma Pollock from '' Watch the Fireworks'', 2007 * "Fortune", a song by Great Big Sea from '' Sea of No Cares'', 2002 Sports and games * Fortune (''Metal Gear''), a video game character * Fortune (pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Scientist
''New Scientist'' is a popular science magazine covering all aspects of science and technology. Based in London, it publishes weekly English-language editions in the United Kingdom, the United States and Australia. An editorially separate organisation publishes a monthly Dutch-language edition. First published on 22 November 1956, ''New Scientist'' has been available in online form since 1996. Sold in retail outlets (paper edition) and on subscription (paper and/or online), the magazine covers news, features, reviews and commentary on science, technology and their implications. ''New Scientist'' also publishes speculative articles, ranging from the technical to the philosophical. ''New Scientist'' was acquired by Daily Mail and General Trust (DMGT) in March 2021. History Ownership The magazine was founded in 1956 by Tom Margerison, Max Raison and Nicholas Harrison as ''The New Scientist'', with Issue 1 on 22 November 1956, priced at one shilling (). An article in the magazi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethereum
Ethereum is a decentralized blockchain with smart contract functionality. Ether (abbreviation: ETH) is the native cryptocurrency of the platform. Among cryptocurrencies, ether is second only to bitcoin in market capitalization. It is open-source software. Ethereum was conceived in 2013 by programmer Vitalik Buterin. Other founders include Gavin Wood, Charles Hoskinson, Anthony Di Iorio, and Joseph Lubin. In 2014, development work began and was crowdfunded, and the network went live on 30 July 2015. Ethereum allows anyone to deploy decentralized applications onto it, with which users can interact. Decentralized finance (DeFi) applications provide financial instruments that do not directly rely on financial intermediaries like brokerages, exchanges, or banks. This facilitates borrowing against cryptocurrency holdings or lending them out for interest. Ethereum also allows users to create and exchange non-fungible tokens (NFTs), which are tokens that can be tied to un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolling Stone
''Rolling Stone'' is an American monthly magazine that focuses on music, politics, and popular culture. It was founded in San Francisco, California, in 1967 by Jann Wenner and the music critic Ralph J. Gleason. The magazine was first known for its coverage of rock music and political reporting by Hunter S. Thompson. In the 1990s, the magazine broadened and shifted its focus to a younger readership interested in youth-oriented television shows, film actors, and popular music. It has since returned to its traditional mix of content, including music, entertainment, and politics. The first magazine was released in 1967 and featured John Lennon on the cover, and was then published every two weeks. It is known for provocative photography and its cover photos, featuring musicians, politicians, athletes, and actors. In addition to its print version in the United States, it publishes content through Rollingstone.com and numerous international editions. The magazine experienced a rapid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecture Notes In Computer Science
''Lecture Notes in Computer Science'' is a series of computer science books published by Springer Science+Business Media since 1973. Overview The series contains proceedings, post-proceedings, monographs, and Festschrifts. In addition, tutorials, state-of-the-art surveys, and "hot topics" are increasingly being included. The series is indexed by DBLP. See also *'' Monographiae Biologicae'', another monograph series published by Springer Science+Business Media *'' Lecture Notes in Physics'' *'' Lecture Notes in Mathematics'' *'' Electronic Workshops in Computing'', published by the British Computer Society image:Maurice Vincent Wilkes 1980 (3).jpg, Sir Maurice Wilkes served as the first President of BCS in 1957. The British Computer Society (BCS), branded BCS, The Chartered Institute for IT, since 2009, is a professional body and a learned ... References External links * Academic journals established in 1973 Computer science books Series of non-fiction books ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algorand
Algorand is a proof-of-stake blockchain and cryptocurrency. Algorand's native cryptocurrency is called ALGO. The SEC has filed several lawsuits alleging ALGO is a security which is subject to regulation under U.S. securities laws, along with a few other crypto assets. Algorand may also refer to the private corporation based in Boston, as well as to the nonprofit Algorand Foundation Ltd., incorporated in Singapore. History Algorand was founded in 2017 by Silvio Micali, a computer scientist and professor at the Massachusetts Institute of Technology (MIT). Algorand's test network was launched to the public in April 2019. The main Algorand network was officially launched in June 2019. Design Algorand can only be forked intentionally through soft forks and source code forks. Consensus algorithm Algorand uses a Byzantine agreement protocol that leverages proof of stake, which contributes to its energy efficiency. It is a competitor to layer 1 blockchains such as Ethere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardano (cryptocurrency Platform)
Cardano is a public decentralized blockchain platform which uses the cryptocurrency, ADA, to facilitate transactions. Cardano's development began in 2015. When launched in 2017, it was the largest cryptocurrency to use a proof of stake blockchain. A number of independent entities collaborate on the project, including the Cardano Foundation based in Zug, Switzerland and led by its chief executive officer Frederik Gregaard. History After leaving Ethereum in 2014, Charles Hoskinson and Jeremy Wood set out their plans for establishing Cardano in 2015. Hoskinson had left Ethereum after a dispute with another co-founder, Vitalik Buterin; Hoskinson wanted to accept venture capital and create a company, while Buterin wanted to keep it as a nonprofit organization. Wood and Hoskinson co-founded the business IOHK to develop blockchains for use by corporations, governments, and education institutions. Cardano was initially released to the public in 2017. That year, IOHK partnered with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tezos
Tezos is an open-source blockchain that can execute peer-to-peer transactions and serve as a platform for deploying smart contracts. The native cryptocurrency for the Tezos blockchain is the tez (ISO 4217: XTZ; sign: ). The Tezos network achieves consensus using proof-of-stake. Tezos uses an on-chain governance model that enables the protocol to be amended when upgrade proposals receive a favorable vote from the community. Its testnet was launched in June 2018, and its mainnet went live in September 2018. History Tezos was first proposed in 2014 and created by husband-and-wife team Arthur and Kathleen Breitman. While working at Morgan Stanley in 2014, Arthur Breitman released two papers that proposed a new type of blockchain under the pseudonym "L. M. Goodman," referencing a journalist at ''Newsweek'' who had misidentified the creator of Bitcoin. He chose the name "Tezos" after writing a program to list unclaimed websites that could be pronounced in English. In 2015, intendin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polkadot (cryptocurrency)
Polkadot is a decentralized, nominated proof-of-stake blockchain with smart contract functionality. The cryptocurrency native to the blockchain is the DOT. It is designed to allow blockchains to exchange messages and perform transactions with each other without a trusted third-party. This allows for cross-chain transfers of data or assets, between different blockchains, and for decentralized applications (DApps) to be built using the Polkadot Network. History Founding and ICO (2016–2019) Polkadot was created by the Ethereum co-founder Gavin Wood, Robert Habermeier and Peter Czaban. The white paper for Polkadot was published by Wood in 2016. The Polkadot SDK and other core technology components are being developed by Parity Technologies. The project raised over $144.3 million in its Initial coin offering in October 2017. In 2017, Gavin Wood, Aeron Buchanan, Peter Czaban, Reto Trinkler, and Mathias Bucher, established the Web3 Foundation, a non-profit organization based i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
