close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": /usr/lib/python2.7/dist-packages/libsvn/_fs.so: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Changes between Version 1 and Version 2 of jazz/10-09-09


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Timestamp:
Sep 9, 2010, 10:12:00 AM (14 years ago)
Author:
jazz
Comment:

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  • jazz/10-09-09

    v1 v2  
    22
    33 * [https://docs.google.com/present/view?id=ddqtts2d_396cf7pj4g8 Web Tools for Blended Learning:  Experiences in a real-world teaching] - 分享如何用 Web 2.0 的工具來提昇教學品質
     4
     5== Embedded Virtualization and Security ==
     6
     7 * [http://embeddedinnovator.com/securing-smart-grid-devices Securing Smart Grid Devices - Using Virtualization to Protect the Grid]
     8   * 智慧電網的資料風險包括: - Data at risk includes:
     9    * 診斷資訊 Diagnostic information
     10    * 維護資訊 Maintenance information
     11    * 身份識別 Identification (potentially including personal information)
     12    * 帳單資訊 Billing data
     13    * 系統狀態 System status
     14   * 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!!
     15   * 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.
     16     * 優點一：降低佈署成本
     17     * 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.
     18   * [[Image(http://cloud1.opensystemsmedia.com/wind-river-figure-1_thumb.png)]]
     19   * 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.
     20   * 因此 hypervisor 必須提供 Secure Inter-Process Communication (Secure IPC or SIPC)
     21   * [[Image(http://cloud1.opensystemsmedia.com/wind-river-figure-2.png)]]
     22   * 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。
     23   * [[Image(http://cloud1.opensystemsmedia.com/wind-river-figure-3_thumb.png)]]