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
Digital gold currency security token that changes the passphrase with each logon, but charges the account holder USD $99.50 for the token. E-bullion does not require customers to use the Cryptocard, so account holders who choose not to get one may suffer from the same security issues as e-gold customers. Pecunix devised a unique rotating key system that provides many of the benefits of a security token without requiring the user to buy one. Pecunix also supports the use of PGP signatures to access an account, which is probably the strongest of all authentication methods. Digital gold currency is a form of representative