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成果報告書詳細
管理番号20180000000153
タイトル*平成29年度中間年報 IoT 推進のための横断技術開発プロジェクト 複製不可能デバイスを活用したIoTハードウェアセキュリティ基盤の研究開発
公開日2018/6/26
報告書年度2017 - 2017
委託先名学校法人立命館 国立研究開発法人産業技術総合研究所 パナソニックセミコンダクターソリューションズ株式会社 ブリルニクスジャパン株式会社
プロジェクト番号P16007
部署名IoT推進部
和文要約
英文要約Title: Project to develop cross-sectoral technologies for IoT promotion/Research and Development of Hardware-security Platform for IoT using Physically Unclonable Functions (PUF)
(FY2017-FY2018) FY2017 Annual Report

We develop hardware-security platform for IoT edge devices using Physically Unclonable Functions (PUF). PUF generates the unique IDs which enable to securely generate or store encryption keys. Low cost anti-counterfeit and/or device authentication can be realized even on the IoT devices without non-volatile secure memory. We focused on the following two important themes; (A) PUFs using new technologies and (B) PUF evaluation and standardization.

Theme(A) PUFs using new technologies
(A-1) Reconfigurable ReRAM PUF
The ReRAM is a nonvolatile memory that stores data according to the resistance value of the memory cell. The ReRAM PUF generates unique data by using the variation in the resistance value. And, the ReRAM PUF has a high potential as a reconfigurable PUF.
An architecture of reconfig-evaluation was developed using ReRAM memory array chip and external FPGA. As a result of the evaluation, the ReRAM PUF was convinced that the target criteria could be achieved.
(A-2) CMOS Image Sensor PUF
We have proposed the CIS-PUF based on pixel device variations of CMOS image sensor (CIS). Challenge and response authentication is demonstrated with a 2-Mpixel CIS. In order to further increase the number of authentication, the Lehmer code is utilized to generate the device identifier (see SCIS2018, 2D1-2). Besides, a novel soft decision fuzzy extractor is proposed for secure key generation (see SCIS2018, 2D1-4).
(A-3) Flexible Printable PUF
We developed high yield fabrication processes of organic TFT and evaluated the printed PUF. To improve the yield, controlling the wetness of organic semiconductor on the insulator surface is important. We developed new lyophilic molecules to improve the wetness. We succeeded to pattern for organic semiconductor with high resolution and to fabricate PUF circuit consist of 3 stage ring oscillators in sufficient yield.

Theme(B) PUF evaluation and standardization
(B-1) PUF evaluation platform and international standardization
To explore the security requirements and test methods of PUFs, we developed the PUF evaluation platform including test vehicles, evaluation boards and evaluation tools. We also organized the PUF IS Exploratory Committee to discuss the PUF evaluation strategy. Based on the discussion held in the PUF Committee, we made comments to ISO/IEC 20897.
(B-2) Attack methods against PUFs and vulnerability evaluation
We have studied two types of attacking methods; the attack applying Deep learning and the attack utilizing side-channel information. In the former study, a prediction accuracy of C&R pairs on arbiter-PUFs (A-PUFs) were greatly improved. In the latter study, the attack on a XOR A-PUF and FF A-PUF with resistance against conventional machine-learning attacks were succeed.
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