1. Advanced Metering Infrastructure AMI Security Roadmap April 13, 2007

2. www.sce.com/ami © Copyright 2007, Southern California Edison 2 Security History and Status Pre-RFP –Initial security analysis focused on threat assessments, information classification, NERC CIP analysis, and functional expectations –Conceptual security architecture based on business and regulatory requirements. This architecture showed the system capabilities and end to end cryptographic information flow –Functionality represented within the conceptual architecture focused on: Preventing unauthorized access/control of the AMI network Secure meter registration and revocation AMI device authentication Customer data integrity/confidentiality Advanced intrusion detection –Conceptual security architecture validated with technology and method specific design example (AMI Reference Architecture). Design used AMI Lightweight Cryptographic Services (ALCS) based on robust secret sharing techniques. Reference architecture used for internal validation only… –Confirmed vendor responsibility –Continuing concerns over vendors technical capability maturity RFP –Requirements abstracted to highest functional representation to allow for vendor design flexibility –Conceptual architecture and information shown as an example –Capability maturity risk mitigation: Recommend partnering with a third party security vender Current –Vendors RFP security response confirmed capability concerns (varied by vendor) –In general, current vendor security related capability maturity is low

3. www.sce.com/ami © Copyright 2007, Southern California Edison 3 Strategies and Principles AMI security artifacts are specified and designed as a response to business requirements, regulatory requirements and environmental threats –Uses Unified Information Assurance Framework (i.e., System engineering based methodologies) –Functional requirements are appropriate given risk analysis AMI security services are part of unified business enterprise (i.e., TDBU, CSBU, IT) Use industry engagement (when appropriate) to further industry capabilities –motivate vendors through standards –design vetting –establish best practices Use Evolutionary/Spiral development to roll capabilities out over a several releases (realistic expectations) Security capabilities enable functionality and ultimately add business value

4. www.sce.com/ami © Copyright 2007, Southern California Edison 4 Goals of AMI Security Design & Implementation Security is viewed as an enabling function to increase capabilities over time Security Design is focused on mitigating the impact of the realization of AMI security requirements on the performance of the entire AMI solution Security is design in the context of the overall AMI System of Systems Context Threats and vulnerabilities are evaluated in the context of the risk to the business processes AMI enables Security Design in the context of the overall AMI System

5. www.sce.com/ami © Copyright 2007, Southern California Edison 5 Security Technology Capability Maturity (Updated)

6. www.sce.com/ami © Copyright 2007, Southern California Edison 6 Field Test: Capabilities and Architecture - Initial Configuration of Cryptographic Services - Field Test Configuration primarily used for Performance related testing (Crypto Latency: Computational and Network) - Vendors support Field Test Capabilities (Pre-placed keys)

7. www.sce.com/ami © Copyright 2007, Southern California Edison 7 Release One: Capabilities and Architecture - Initial Key Management Services - Integration with Infrastructure Services (e.g., IDM, Access Controls) - Complete Network Configuration (e.g., firewall and IPS services)

8. www.sce.com/ami © Copyright 2007, Southern California Edison 8 Release Two: Capabilities and Architecture - Add HAN Device Authentication & Confidentiality - Key Management and Cryptographic Updates (RFP Compliances)

9. www.sce.com/ami © Copyright 2007, Southern California Edison 9 Release Three: Capabilities and Architecture - Complete set of Security Services - Cryptographic Update: Complete Registration, Authentication, Distribution - Integrated with IT PKI - HAN Security Update

10. www.sce.com/ami © Copyright 2007, Southern California Edison 10 Unified Enterprise Context - Cryptographic scheme unified across enterprise - Complete enterprise (AMI+DA+CSN) view through audit services - All field elements are registered and authenticated - Centralized security operations for field assets - Leverages existing IT services (e.g., IDM) - Common/shared management services

11. www.sce.com/ami © Copyright 2007, Southern California Edison 11 Next Steps Internal engagement within SCE –Security workshops (TDBU, CSBU, IT) –Business policy alignment External engagement with Vendors –Clarify vendor direction –Clarify adherence to industry and SCE policies –Ensure vendor integration within SCE enterprise External engagement with Industry –Push and monitor security standards (e.g., Title-24, openHAN, utilityAMI, UtiliPoint, etc.) –Use open Innovation approach to lead the way in AMI Security