Direct banking, e-banking or e-finance involves a direct customer relationship between the bank client and the bank without a physical branch. In the early days of direct banking, it was banking services via the telephone or fax that the customer could use 24 hours a day
, seven days a week. In the 1990s with the development of the Internet, there was a boom in direct banking models. With direct banking or home banking, e-banking, e-finance or online banking, banks were able to reduce their costs simply by eliminating the rental costs of their branches and branch employees. With e-banking, customers benefit from lower costs and permanent access to banking services via various communication methods such as the Internet, telephone and also mobile via mobile banking. Critical to the success of direct banking is the security of the virtual bank's customer data.