XXXX C37. 118 and IEC 00000-0-0 The IEEE C37.118 standard (IEEE Standard for Synchrophasor Data Transfer for Power Systems) consists of two parts: • IEEE C37.118.1 [8] defines the synchronized phasor measurement exchange methods including types, use, contents, and data formats for real-time communication • IEEE C37.118.2 [9] specifies the communication protocol for real-time communication between phasor measurement units and connected devices and applications. The IEEE C37.118.2 specifies communication infrastructures ranging from serial communication lines to IP based technologies and demand real-time transmission of messages with very low latency. Generally, the IEEE C37.118 standard itself does not include any security feature and therefore adequate security measures must be addressed when data is transmitted across huge geographic area. There are also a number of available papers which analyse potential cyber vulnerabilities and threats and specify best practices to overcome cyber vulnerabilities [10], [11], [12], [13], [14], [15]. The same applies to the IEC standard 00000-0-0 (Specific Communication Service Mapping (SCSM) – Mappings to MMS (ISO 9506-1 and ISO 9506-2) and to ISO/IEC 8802-3) [16]. The standard merely states that security authentication is a future work item of the IEC Technical Committee 57 Working Groups 7 and 15. Table 4 displays the modelled attributes of IEEE C37.118 and IEC 00000-0-0. Table 4: Threat modelling attributes of IEEE C37.118 and IEC 00000-0-0. Constraint IEEE C37.118 IEC 00000-0-0 Physical Network unconstrained unconstrained Source Authenticated No No Destination Authenticated No No
