International Electrotechnical Commission

Electricity metering – Payment systems – Part 41: Standard transfer specification (STS) – Application layer protocol for one-way token carrier systems - Edition 1.0
 N 62055-41

Annotation

This part of IEC 62055 specifies the application layer protocol of the STS for transferring units of credit and other management information from a point-of-sale (POS) system to an STScompliant payment meter in a one-way token carrier system. It is primarily intended for application with electricity payment meters without a tariff employing energy-based tokens, but may also have application with currency-based token systems and for services other than electricity.

It specifies

• a POSToTokenCarrierInterface structured with an application layer protocol and a physical layer protocol using the OSI model as reference;

• tokens for the application layer protocol to transfer the various messages from the POS to the payment meter;

• security functions and processes in the application layer protocol such as the Standard Transfer Algorithm and the Data Encryption Algorithm, including the generation and distribution of the associated cryptographic keys;

• security functions and processes in the application layer protocol at the payment meter such as decryption algorithms, token authentication, validation and cancellation;

• specific requirements for the MeterApplicationProcess in response to tokens received;

• a scheme for dealing with payment meter functionality in the MeterApplicationProcess and associated companion specifications;

• generic requirements for an STS-compliant KeyManagementSystem;