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Digital currency can be denominated to a sovereign currency and issued by the issuer responsible to redeem digital money for cash. In that case, digital currency represents electronic money (e-money). Digital currency denominated in its own units of value or with decentralized or automatic issuance will be considered as a virtual currency.
Since 2014, China's central bank has been working on a project called DCEP (Digital Currency Electronic Payment) or digital renminbi, [8] often also referred to as the "digital yuan" as it would be backed by the yuan. [9] At the end of 2017, the China's central bank organized a number of banks and institutions to jointly develop the DCEP system.
The aes grave (heavy bronze) (or As) is the start of the use of coins in Rome, ... By the 2000s most money existed as digital currency in banks' databases. [125]
A central bank digital currency would likely be implemented using a database run by the central bank, government, or approved private-sector entities. [13] [14] [15] The database would keep a record (with appropriate privacy and cryptographic protections) of the amount of money held by every entity, such as people and corporations.
The first proposals for distributed digital scarcity-based cryptocurrencies came from cypherpunks Wei Dai (b-money) and Nick Szabo in 1998. [12] In 2004, Hal Finney developed the first currency based on reusable proof of work. [ 13 ]
By the 2010s, digital payment methods were widespread in many countries, with examples including intermediaries such as PayPal, digital wallet systems such as Apple Pay, contactless and NFC payments by electronic card or smartphone, and electronic bills and banking, all in widespread use. [4]
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Prior to the release of bitcoin, there were a number of digital cash technologies, starting with the issuer-based ecash protocols of David Chaum and Stefan Brands. [3] [4] [5] The idea that solutions to computational puzzles could have some value was first proposed by cryptographers Cynthia Dwork and Moni Naor in 1992.