Inepro IP Reader Technical Manual page 16

Communication
Communication between the card reader and the IP
Controller Board
The communication between one of the supported card reader and
the IP Controller board is done by a protocol (a definition of
communication codes or language by which they can communicate).
Many manufacturers
communication protocol.
To comply to those protocols the IP reader software is adapted to
the applied protocol.
Communication between the server and the IP
Controller Board
Inepro has defined it's own protocol for communication between the
IP controller board and the server.
To ensure the security of the card data an AES (Advanced Encryption
Standard) encryption is applied to the data.
Encryption
The encryption key is renewed with every connection so it is not
possible for another device than the IP controller board to present
card data to the server. With every connection the server will send a
new AES key to the IP controller board. This encryption key is
received by the IP controller board and used to encrypt the data
before it is transmitted to the server.
A time-out for the data to arrive at the server is set at 10 seconds. If
the server does not respond within this time, the protocol will be
cancelled and the data will not be processed.
Alternative server
It is possible to set up a second server for the IP reader. This allows
the IP reader to look for an alternative server if the main server does
not respond.
8 - IP Reader
of readers have defined their own