The Standard Transfer Specification is the global standard for the transfer of electricity and other utility
prepayment tokens, ensuring inter-operability between system components from different manufacturers.
What is the STS?
The Standard Transfer Specification (STS) describes a secure message system for carrying information between a point-of-sale and a meter, and is currently finding wide application in electricity metering and payment systems.
Virtual Secure Module
STS Edition 2
The latest edition of the specifications, STS Edition 2, not only maintains backward compatibility to the current systems in use, but more importantly, it enables the use of the latest state of the art cryptographic algorithms, while also introducing many new features in order to keep abreast with modern metering technologies.
The members of the association are companies and utilities involved in the manufacture, supply or operation of STS based systems. Membership can be obtained by signing our membership agreement and paying the prescribed joining and annual membership fees.
The Token Identifier is a 24 bit field, contained in STS compliant tokens, that identifies the date and time of the token generation. It is used to determine if a token has already been used in a payment meter. The TID represents the minutes elapsed since the 1st January 1993. The incrementing of the 24 bit field means that at some point in time, the TID value will roll over to a zero value.