The system shall be flexible enough that the consumer can get the credit anywhere and anytime. To make this happen the vending system shall be “Web based Vending System” for easy operation, token generation by any POS machines. Web server shall be at the end of the supplier. Utility shall be paying the per token generation charge to the supplier.
On receipt of the vend request the system have a provision to ascertain the identity of the consumer. The keys to identify the consumer can be the meter serial number or account number.
The vend terminal send the request to a central database that authenticates the transaction and generate an encrypted code.
In order to provide maximum security to the system the encryption is not done on the vend terminal.
On receipt of each request the vend terminal connects to the central database and get the code generated.
The code hence generated can be printed on paper using the attached printer.
The vending system is used to transfer current values (Rupees) to the meter.
The consumer pay the money at the vend terminal, this information when fed to the vend terminal is to be send to the central database that encrypts the token using Triple DES encryption algorithm.
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