PREPAYMENT METER_PRESENTATION_Don Taylor.pdf
0 likes67 views
The document discusses the Standard Transfer Specification (STS), which is a secure message protocol for prepayment meters. It has been an industry standard since 1994 and is now also an IEC standard. There are approximately 5 million STS meters installed worldwide. The STS Association oversees the STS standard and provides key management and product certification services to support its use. The association is working to enhance the STS and integrate it further into the family of IEC 62055 standards for prepayment metering.
PREPAYMENT METER_PRESENTATION_Don Taylor.pdf
- 1. Prepayment Standard Transfer Specification: An IEC standard Especifica??o de Transferência de Padr?es de Pré Pagamento: Um padr?o IEC Don Taylor
- 2. Prepayment Standard Transfer Specification: An IEC standard Don Taylor, STS Association, South Africa The Standard Transfer Specification is a secure message protocol between a POS and a Meter, supported by a secure Key Management System and protocol. The STS has been an industry standard since 1994 and is now also published as IEC/PAS 62055? 41. It is currently being converted into a full IEC standard and publication is targeted for 1st half of 2006. There are approximately 5 million STS meters installed in about 30 countries and operated by about 300 utility companies. This entire user base is served from one Key Management Center with about 700 Supply Group keys under its management care. The STS Association is the custodian of the STS and continues to sustain the standard in all its phases from development to application and maintenance. It also assures the integrity and quality of the support infrastructure and facilitates access to services like key management, product certification and the further development of standards. Members currently comprise of 18 manufacturers, 2 utility companies and one AMEU/ESLC representative. Activities of the STS Association are focusing on facilitation of key management services, product certification services, certification of other key management systems and codes of practice for key management centers. It is actively participating on WG15 of IEC TC13 towards creation of the full IEC standard, developing enhancements to the STS and to the existing key management system. IEC standards that are relevant to prepayment meters, which are already published or in final stage of publication are IEC 62051 (Glossary of terms), IEC 62052?11: General requirements for metrology, IEC 62053?21: Particular requirements for metrology, IEC 62055?21: Framework for standardization, IEC 62055?31: Particular requirements for payment meters and IEC 62055?41: Standard Transfer Specification. The IEC 62055?21 Framework looks at the standardization of payment metering systems and covers processes, functions, data elements, system entities and interfaces from a generic perspective. It further advocates a scheme whereby many systems or subsystems may be standardized within the IEC 62055 set of standards, such as the STS, which is thus the first one in the set to be standardized in this fashion. Generic functions and processes with sub?classification of functions for a single part payment meter are also detailed. The IEC 62055?41 Standard Transfer Specification uses the OSI reference model defining at least an application layer and physical layer protocol with the token carrier as the medium in the physical layer. This makes the standard more versatile and manageable. It also defines the generic structure for a Virtual Meter in terms of Function Objects, which in turn describe the functionality of the payment meter and, which are then specifically defined in Companion Standards under the management of the STS Association. Enhancements to the STS, currently under development, follow the same IEC reference model and maintain backward compatibility with the present STS version. Main features of the enhancements are: bulk data transfer token? token frame with up to 255 tokens in one frame? feedback data from the meter via the token carrier? 2 way
- 3. token carrier? 21 digit numeric token? The Companion Standards currently under consideration are: step tariff with auxiliary charges? accounting function with social credit, token credit, credit advance and lifeline credit? metering for water? control valve for water? real?time clock with battery? Requirements for key management enhancements under consideration are: the key management center should be globally trusted, industry impartial and cater for the deregulated market? services should be automated on 24/7 basis and remotely accessible? variety of secure module formats, remote coding and inter ? KMC key exchange protocol. In conclusion it would be true to say that prepayment is still growing and developing and establishing support infrastructure in the international arena, while maintaining healthy standards.
- 4. Don Taylor chairperson STS Association ? South Africa Standard Transfer Specification: Standard Transfer Specification: an an IEC Standard IEC Standard www. www.sts sts.org. .org.za za ? Payment ? Credit ? Encryption ? Token ? Decryption ? Credit ? Consumption ? Key Management STS ? STS ? Point Of Sale Prepayment Meter Credit Token Credit Encrypt Decrypt Key Key Payment Consumer Supply M Consumption Key Management System
- 5. ? Secure message protocol ? POS / Meter ? Secure key management system + protocol ? IEC standard ? 5 million meters ? 30 countries ? 300 utilities ? 1 Key Management Center ? South Africa ? 700 SGC keys STS ? STS ? Standard Transfer Specification Standard Transfer Specification ? Custodian of the STS ? Facilitates the support infrastructure ? Key Management, Certification and Standards ? 21 members ? 19 manufacturers + 2 utilities + AMEU/ESLC STS Association ? STS Association ?
- 6. ? Key management services ? Certification of products ? Certification of key management systems ? Codes of practice for key management ? IEC standardization ? STS enhancement ? Key management enhancement STSA focus ? STSA focus ? ? 62051 : Glossary ? 62052?11: General requirements (metrology) ? 62053?21: Particular requirements (metrology) ? 62055?21: Framework for standardization ? 62055?31: Type Specification (payment meter) ? 62055?41: Standard Transfer Specification IEC IEC ? ? Payment Meters Payment Meters
- 7. ? General system concepts IEC IEC ? ? Concept model Concept model (62055 (62055? ?21) 21) Processes use Data Elements Functions System Entities Users Devices use embodied in embodied in comprises comprises instance instance operate on instances Supplier Customer Operator Installer Inspector Token Carrier Payment Meter Interfaces Interfaces ? More than one standard ? Create when required ? STS is 1st one of the set IEC IEC ? ? Framework Framework (62055 (62055? ?21) 21) Payment Meters Token Carriers Customer Information Systems Data Elements Generic functions Generic processes Point Of Sale Systems System 1 System 2 System n use CIS to POS Interfaces use use Token Carrier to Meter Interfaces POS to Token Carrier Interfaces
- 8. ? Single? part payment meter ? Generic functions IEC IEC ? ? Meter model Meter model (62055 (62055? ?21) 21) Token Token Carrier Token Carrier Interface Accounting Metering Delivery Supply network Load circuit metered supply delivered supply connected supply Display Recording Test Security Time Meter Application Process User Interface (62055?41) ? STS tokens ? STA ? DES ? Mag card ? Numeric ? Serial port IEC IEC – – Standard Transfer Specification Standard Transfer Specification Physical Layer Protocol Application Layer Protocol TCDU POS Application Process APDU Physical Layer Protocol Application Layer Protocol TCDU METER Application Process APDU Key Management Virtual Meter Function Objects Token Carrier Standard Transfer Specification Companion Standards
- 9. ? Follows IEC model ? Backward compatible ? Bulk token (40?940 bits) ? Token frame (255 tokens) ? Feedback from meter ? 2 way token carrier (Dallas iButton, Smart card) ? Companion standards STS STS ? ? Enhancement Enhancement ? Step tariff ? Auxiliary charge ? Social credit ? Token credit ? Credit advance ? Lifeline credit ? Metering (water meter) ? Delivery (water valve) ? Real?time clock ? Battery backup Companion Standards Companion Standards
- 10. ? Requirements ? Globally trusted Key Management Center ? Industry impartial Key Management Center ? Deregulated market needs ? Distributed services architecture ? Automated services 24/7 ? Remote Secure Module coding ? Variety of Secure Module formats ? Inter – KMC protocol ? Standards repository Key Management Key Management enhancement enhancement ? International arena ? Creating support infrastructure ? Providing services STSA STSA ? ? STS STS ? ? IEC IEC
- 11. ? Article in Metering International ? Visit our website : www. www.sts sts.org. .org.za za ? Join the STS Association ? Come speak to me Finally ? Finally ?
- 12. Biography Speaker: Don Taylor Position: Chairman Company: STS Association Country: South Africa Don Taylor is the Director of Technology for Actaris Measurement & Systems (Pty) Ltd. He is currently Chairman of the STS Association and a participating working group member on various standards organisations such as the SANC for the IEC, SANS, NRS, STS Association and IEC. He is also a longstanding member of the SAIMC. In 1976 he graduated with a Higher National Diploma in Electrical Engineering from the Cape College for Advanced Technical Education, after which he worked for 2 years in the gold mining industry followed by 10 years for the CSIR and 18 years in the prepayment industry. He is recognized as a co?founder of the prepayment industry in SA and developer of the first commercialized solid?state integrated prepayment meter worldwide in 1985. He also co? founded the first South African prepayment meter manufacturing company Angcon Technologies in 1986, which later became AEG Energy Control, then Schlumberger and now Actaris. In 1994 he co?founded the IEC WG15 for payment systems and in 1997 co?founded the STS Association of which he has been chairman since 2000.
- 13. Company Background Information Company: STS Association Country: South Africa The STS Association ensures that users of the Standard Transfer Specification have the supporting infrastructure to enable the secure operation of prepayment systems, and assures the interoperability of equipment from different suppliers through the certification of STS compliant equipment. The Association promotes the application of the standard, and further develops it to meet emerging international needs for additional functionality.