Physically Obfuscated Keys (POK) are used to embed in chips secret bit-strings to be used in cryptographic protocols. Usually a POK is built as an array of elementary 1-bit POKs (cells). In order to guarantee that the same secret bit-string is generated at every turn-on, stabilizer circuits are required, which are typically based on possibly expensive error-correction circuitry. In this paper we propose a stabilizer scheme that is not based on error-correction codes, but rather forces to zero the cells that are too unreliable and compensate for the disabled cells by means of a mixing stage.

中文翻译：

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物理混淆密钥的一些简单稳定器分析

物理混淆密钥（POK）用于在芯片中嵌入要在密码协议中使用的秘密比特串。通常，将POK构建为基本的1位POK（单元）的数组。为了确保在每次打开时都生成相同的秘密位串，需要稳定器电路，该电路通常基于可能昂贵的纠错电路。在本文中，我们提出了一种稳定器方案，该方案不是基于纠错码，而是将太不可靠的单元归零，并通过混合阶段来补偿禁用的单元。