The client communicates with the provider over the Internet, using the TCP/IP
protocol and GPRS connection. Communication uses the Client/Server mode.
The client downloads the client application during the first connection and then
uses it for access to the required services.
To ensure security, the client proves his or her identity by using the mobile phone
with the appropriate (individual) encryption key and by entering his/her access PIN. To achieve an
even higher security level, it is possible to authenticate the client (when logging-in to the
system) or individual client requests with another element (password, token, grid card, or code
table—TAN).
