開發無線硬件防篡改保護

2453872 2017-05-24 | rar | 0.15 MB | 次下載 | 免費

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開發無線硬件防篡改保護

　　從智能卡到智能儀表，有許多不同的方式無線節點可以在物聯網攻擊。本文著眼于設備的方式是防止各種惡意代碼篡改，從物理微分功率分析（DPA）和設計師的方式可以對他們的保護，包括設計技術和實現物理不可克隆功能（PUF）。

　　保護信息安全是物聯網的關鍵挑戰之一。無線通信是一個關鍵技術，在這個推出，使傳感器和控制節點，易于安裝和管理在互聯網上。通過加密來保護無線鏈路是一個關鍵的設計技術，無線節點本身很容易受到篡改。這可以截獲被采集的數據、加密密鑰或代碼本身。黑客可能是為了個人利益，改變無線連接的智能電表中的數據，或從近場通信（NFC）信用卡和借記卡攔截數據的國際團伙。

　　There are various techniques for tampering， especially for capturing the encryption keys. Once a hacker has access to these， all the data in the system is potentially available， giving all sorts of insights into the activity of the node and as a result into the activity of the wallet， home or factory.

　　Anti-tampering is a key element in the design of smart meters， NFC chips and wireless IoT nodes， so understanding the attack mechanisms is vital.

　　The smartcard industry typically places attacks into one of three categories. Non-invasive side channel attacks use information out of the power profile or the electromagnetic emanation， while fault attacks use laser light or glitches in the voltage to change how a chip responds. The power of this technique can be seen in the recent glitch in the Raspberry Pi 2 low-cost computer board that resets when exposed to a camera flash. A third technique is reverse engineering by stripping down the layers of the chip to discover the transistor structure and access data， particularly in the read-only memory， as a result.