When paying online, most websites encrypts the connection between the computer and the individual payment service: "s" is added after "http" (which is "https://) and vast majority of web browsers display a small padlock in the corner of the screen. The "s" after http this means that the connection between your computer and the server is encrypted payment by the SSL protocol : if an hacker intercepts data, it will be a succession of incomprehensible symbols.
With the development of electronic commerce (e-commerce) to set up secure payment which prevent the consumer to give his credit card number to the website. A "trusted third party" sites provides merchants a secure payment system.
The e-carte bleue adopted in France by Societe Generale, Groupe Banque Populaire, LCL, and Caisse d'Epargne, from an Irish technology (company Orbiscom) in partnership with Wanadoo France Telecom Group, under the aegis of Carte Bleue La Banque Postale. Systems of Savings: SPPlus and Id-tronic. Click the Secure proposes that Israeli society Cyota United States. Virtualis system available in some federations Crédit Mutuel. System Net + Virtual Card Neovia of British society.
A little history:
In 1987, an American cryptographer David Chaum provides a protocol signature to support Internet transactions. It creates Digicash in 1994, an initiative that can be considered as the first virtual fiat currency. It cut short because too early. Currency exchanged could be re-used several times as a banknote.
Electronic money can not be traced. It is operated by three major banks that are the Mark Twain Bank, and Deutsche EUnet Finland Bank3.
Meanwhile, Visa, MasterCard and American Express together define the SET protocol. Suitable for card transactions on the Internet, therefore bank money, SET, based on the exchange encrypted by a public key system (PKI - RSA) derived from a root key between the issuer and the acquirer a payment gateway, will only be used for very little too complex to implement. This protocol will be replaced later (2000) 3-D Secure, flexible.