|
E-cash
Digital currency (digital money, electronic money or electronic currency) is any currency, money, or money-like asset that is primarily managed, stored or exchanged on digital computer systems, especially over the internet. Types of digital currencies include cryptocurrency, virtual currency and central bank digital currency. Digital currency may be recorded on a distributed database on the internet, a centralized electronic computer database owned by a company or bank, within digital files or even on a stored-value card. Digital currencies exhibit properties similar to traditional currencies, but generally do not have a classical physical form of fiat currency historically that you can directly hold in your hand, like currencies with printed banknotes or minted coins - however they do have a physical form in an unclassical sense coming from the computer to computer and computer to human interactions and the information and processing power of the servers that store and keep t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptocurrency
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. It is a decentralized system for verifying that the parties to a transaction have the money they claim to have, eliminating the need for traditional intermediaries, such as banks, when funds are being transferred between two entities. Individual coin ownership records are stored in a digital ledger, which is a computerized database using strong cryptography to secure transaction records, control the creation of additional coins, and verify the transfer of coin ownership. Despite their name, cryptocurrencies are not considered to be currencies in the traditional sense, and while varying treatments have been applied to them, including classification as commodities, securities, and currencies, cryptocurrencies are generally viewed as a distinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptocurrency
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. It is a decentralized system for verifying that the parties to a transaction have the money they claim to have, eliminating the need for traditional intermediaries, such as banks, when funds are being transferred between two entities. Individual coin ownership records are stored in a digital ledger, which is a computerized database using strong cryptography to secure transaction records, control the creation of additional coins, and verify the transfer of coin ownership. Despite their name, cryptocurrencies are not considered to be currencies in the traditional sense, and while varying treatments have been applied to them, including classification as commodities, securities, and currencies, cryptocurrencies are generally viewed as a distinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Chaum
David Lee Chaum (born 1955) is an American computer scientist, cryptographer, and inventor. He is known as a pioneer in cryptography and privacy-preserving technologies, and widely recognized as the inventor of digital cash. His 1982 dissertation "Computer Systems Established, Maintained, and Trusted by Mutually Suspicious Groups" is the first known proposal for a blockchain protocol. Complete with the code to implement the protocol, Chaum's dissertation proposed all but one element of the blockchain later detailed in the Bitcoin whitepaper. He has been referred to as "the father of online anonymity", and "the godfather of cryptocurrency". He is also known for developing ecash, an electronic cash application that aims to preserve a user's anonymity, and inventing many cryptographic protocols like the blind signature, mix networks and the Dining cryptographers protocol. In 1995 his company DigiCash created the first digital currency with eCash.Greenberg, Andy (2012). ''This M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service (economics)
A service is an "(intangible) act or use for which a consumer, firm, or government is willing to pay." Examples include work done by barbers, doctors, lawyers, mechanics, banks, insurance companies, and so on. Public services are those that society (nation state, fiscal union or region) as a whole pays for. Using resources, skill, ingenuity, and experience, service providers benefit service consumers. Services may be defined as intangible acts or performances whereby the service provider provides value to the customer. Key characteristics Services have three key characteristics: Intangibility Services are by definition intangible. They are not manufactured, transported or stocked. One cannot store services for future use. They are produced and consumed simultaneously. Perishability Services are perishable in two regards: * Service-relevant resources, processes, and systems are assigned for service delivery during a specific period in time. If the service consumer does not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tencent QQ
Tencent QQ (), also known as QQ, is an instant messaging software service and web portal developed by the Chinese technology company Tencent. QQ offers services that provide online social games, music, shopping, microblogging, movies, and group and voice chat software. As of March 2022, there were 563.8 million monthly active QQ accounts. History Tencent QQ was first released in China in February 1999 under the name of OICQ ("Open ICQ", a reference to the early IM service ICQ). After the threat of a trademark infringement lawsuit by the AOL-owned ICQ, the product's name was changed to QQ (with "Q" and "QQ" used to imply "cute"). The software inherited existing functions from ICQ, and additional features such as software skins, people's images, and emoticons. QQ was first released as a " network paging" real-time communications service. Other features were later added, such as chatrooms, games, personal avatars (similar to "Meego" in MSN), online storage, and Internet dati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ABC News
ABC News is the news division of the American broadcast network ABC. Its flagship program is the daily evening newscast ''ABC World News Tonight, ABC World News Tonight with David Muir''; other programs include Breakfast television, morning news-talk show ''Good Morning America'', ''Nightline'', ''Primetime (American TV program), Primetime'', and ''20/20 (American TV program), 20/20'', and Sunday morning talk shows, Sunday morning political affairs program ''This Week (ABC TV series), This Week with George Stephanopoulos''. In addition to the division's television programs, ABC News has radio and digital outlets, including ABC News Radio and ABC News Live, plus various podcasts hosted by ABC News personalities. History Early years ABC began in 1943 as the Blue Network, NBC Blue Network, a radio network that was Corporate spin-off, spun off from NBC, as ordered by the Federal Communications Commission (FCC) in 1942. The reason for the order was to expand competition in radi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty Reserve
Liberty Reserve was a Costa Rica-based centralized digital currency service that billed itself as the "oldest, safest and most popular payment processor, serving millions all around a world". The site had over one million users when it was shut down by the United States government. Prosecutors argued that due to lax security, alleged criminal activity largely went undetected, which ultimately led to them seizing the service. In May 2013, Liberty Reserve was shut down by United States federal prosecutors under the Patriot Act after an investigation by authorities across 17 countries. The United States charged founder Arthur Budovsky and six others with money laundering and operating an unlicensed financial transaction company. Liberty Reserve is alleged to have been used to launder more than $6 billion in criminal proceeds during its history. Background Based in San José, Costa Rica, Liberty Reserve was a centralized digital currency service that allowed users to register and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dot-com Bubble
The dot-com bubble (dot-com boom, tech bubble, or the Internet bubble) was a stock market bubble in the late 1990s, a period of massive growth in the use and adoption of the Internet. Between 1995 and its peak in March 2000, the Nasdaq Composite stock market index rose 400%, only to fall 78% from its peak by October 2002, giving up all its gains during the bubble. During the dot-com crash, many online shopping companies, such as Pets.com, Webvan, and Boo.com, as well as several communication companies, such as Worldcom, NorthPoint Communications, and Global Crossing, failed and shut down. Some companies that survived, such as Amazon, lost large portions of their market capitalization, with Cisco Systems alone losing 80% of its stock value. Background Historically, the dot-com boom can be seen as similar to a number of other technology-inspired booms of the past including railroads in the 1840s, automobiles in the early 20th century, radio in the 1920s, television in the 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blockchain
A blockchain is a type of distributed ledger technology (DLT) that consists of growing lists of records, called ''blocks'', that are securely linked together using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree, where data nodes are represented by leaves). The timestamp proves that the transaction data existed when the block was created. 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 irreversible in that, once they are recorded, the data in any given block cannot be altered retroactively without altering all subsequent blocks. Blockchains are typically managed by a peer-to-peer, peer-to-peer (P2P) computer network for use as a public distributed ledger, where nodes collectively adhere to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitcoin
Bitcoin ( abbreviation: BTC; sign: ₿) is a decentralized digital currency that can be transferred on the peer-to-peer bitcoin network. Bitcoin transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. The cryptocurrency was invented in 2008 by an unknown person or group of people using the name Satoshi Nakamoto. The currency began use in 2009, when its implementation was released as open-source software. The word "''bitcoin''" was defined in a white paper published on October 31, 2008. It is a compound of the words ''bit'' and ''coin''. The legality of bitcoin varies by region. Nine countries have fully banned bitcoin use, while a further fifteen have implicitly banned it. A few governments have used bitcoin in some capacity. El Salvador has adopted Bitcoin as legal tender, although use by merchants remains low. Ukraine has accepted cryptocurrency donations to fund the resistance to the 2022 Russ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PayPal
PayPal Holdings, Inc. is an American multinational financial technology company operating an online payments system in the majority of countries that support online money transfers, and serves as an electronic alternative to traditional paper methods such as checks and money orders. The company operates as a payment processor for online vendors, auction sites and many other commercial users, for which it charges a fee. Established in 1998 as Confinity, PayPal went public through an IPO in 2002. It became a wholly owned subsidiary of eBay later that year, valued at $1.5 billion. In 2015 eBay spun off PayPal to its shareholders, and PayPal became an independent company again. The company was ranked 143rd on the 2022 Fortune 500 of the largest United States corporations by revenue. History Early history PayPal was originally established by Max Levchin, Peter Thiel, and Luke Nosek in December 1998 as Confinity, a company that developed security software for hand-held de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E-gold
e-gold was a digital gold currency operated by Gold & Silver Reserve Inc. (G&SR) that allowed users to open an account on their web site denominated in grams of gold, or other precious metals, and that let users make instant transfers of value ("spends") to other e-gold accounts. The e-gold system was launched in 1996 and had grown to five million accounts by 2009, when transfers were suspended due to legal issues. At its peak in 2006, e-gold was processing more than US$2 billion worth of transactions per year, on a monetary base of 71 million worth of gold (about 3.5 metric tons). e-gold Ltd. was incorporated in Nevis, Saint Kitts and Nevis with operations conducted out of Florida, USA. Beginnings e-gold was founded by oncologist Douglas Jackson and attorney Barry Downey in 1996. The pair originally backed the services accounts with gold coins stored in a bank safe deposit box in Melbourne, Florida. By 1998, G&SR (the system operator) was an Affiliate Member of NACHA and a Ful ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
