2010-09-09
Embedded Virtualization and Security
- Securing Smart Grid Devices - Using Virtualization to Protect the Grid
- 智慧電網的資料風險包括: - Data at risk includes:
- 診斷資訊 Diagnostic information
- 維護資訊 Maintenance information
- 身份識別 Identification (potentially including personal information)
- 帳單資訊 Billing data
- 系統狀態 System status
- 降低風險方案一：建立實體隔離的網路 - build physically separate secure and non-secure devices and networks. - 缺點：佈署成本太高!!
- 降低風險方案二：透過嵌入式虛擬化進行隔離 - leverage embedded virtualization to run both secure and non-secure software on the same device.
- 優點一：降低佈署成本
- 優點二：縮短系統安全驗證時間與人力成本 - Validating system security is a tedious, costly, and time-consuming task, and the effort required grows considerably for complex systems. A secure hypervisor can simplify matters by separating security-critical functions into trusted partitions and less critical software into non-trusted partitions.
- 虛擬化資安隔離需要內部通訊 - Communication between partitions is a key requirement for virtualized systems since there is always a need to transfer data and control from trusted partitions to non-trusted partitions.
- 因此 hypervisor 必須提供 Secure Inter-Process Communication (Secure IPC or SIPC)
- 外部通訊部份則需要 Multiple Single-Level (MSL) networking. 像是 802.1Q for virtual LANs 會使用類似 QoS 的 Tag 封包，讓不同機敏性的資料縱使在同一個實體網路傳輸，也是安全的。
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