Titlebook: Cryptographic Hardware and Embedded Systems -- CHES 2012; 14th International W Emmanuel Prouff,Patrick Schaumont Conference proceedings 201

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PUFKY: A Fully Functional PUF-Based Cryptographic Key Generator The design’s modularity allows for rapid and scalable adaptations for other PUF implementations or for alternative key requirements. The presented PUFKY core is immediately deployable in an embedded system, e.g. by connecting it to an embedded microcontroller through a convenient bus interface.

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,Donors’ Experience and Analysis,the device is wide open to intellectual property (IP) theft, fraud, re-programming as well as reverse engineering of the design which allows the introduction of a new backdoor or Trojan. Most concerning, it is not possible to patch the backdoor in chips already deployed, meaning those using this fam

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,Donors’ Experience and Analysis,ear power consumption model. We also observe that the detection of collisions in software devices may be difficult in the case of optimized implementations, because of less regular assembly codes. Interestingly, the soft decoding approach is particularly useful in these more challenging scenarios. F

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,Donors’ Experience and Analysis,e round Feistel network instantiated with a leakage resilient PRF yields a leakage resilient PRP if the inputs are chosen non-adaptively (This complements the result of Dodis and Pietrzak [CRYPTO’10] who show that if a adaptive queries are allowed, a superlogarithmic number of rounds is necessary.)

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Bindu Lohani,Yasmin Siddiqi,Garrett Kilroyesults on DES and AES verify this model and demonstrate the effectiveness of algorithmic confusion analysis. We expect the model to be extendable to other SCAs, and provide valuable guidelines for truly SCA-resilient system design and implementation.