Digital currency impossible to reverse a transaction, justified or not. It is very similar to cash. Advantages of this system include it being cheaper to operate, and transactions are instantaneous. Western Union, KlickEx and Bitcoin are examples of this type of currency. Soft electronic currencies are the opposite of hard electronic currencies. Payments can be reversed. Usually, when a payment is reversed there is a "clearing time." This can take 72 hours or more. Examples of soft currencies are PayPal and any type of credit card. A hard currency can be "softened" with a third party service. Many existing digital currencies have
Virtual currency and (2) that persons may obtain by their own computing or manufacturing effort". Rather than relying on confidence in a central authority, it depends instead on a distributed system of trust. Digital currency is a particular form of currency that is electronically transferred and stored, i.e., distinct from physical currency, such as coins or banknotes. According to the European Central Bank, virtual currencies are "generally digital", although their enduring precursor, the coupon, for example, is physical. A cryptocurrency is a digital currency using cryptography to secure transactions and to control the creation of new currency units. Since not all virtual