FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms, definitions and abbreviations<br>4 Numbering conventions<br>5 Reference model for the standard transfer specification<br>6 POSToTokenCarrierInterface application layer protocol<br>7 TokenCarriertoMeterInterface application layer protocol<br>8 MeterApplicationProcess requirements<br>9 KMS: KeyManagementSystem generic requirements<br>10 Maintenance of STS entities and related services<br>Annex A (informative) - Guidelines for a KeyManagementSystem<br> (KMS)<br>Annex B (informative) - Entities and identifiers in an STS-compliant<br> system<br>Annex C (informative) - Code of practice for the implementation of<br> STS-compliant systems<br>Bibliography