Secure and Reliable Key Agreement with Physical Unclonable Functions.

Secure and Reliable Key Agreement with Physical Unclonable Functions.
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DOI:
10.3390/e20050340
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发表时间:
2018-05-03
期刊:
Entropy (Basel, Switzerland)
影响因子:
--
通讯作者:
Schaefer RF
Schaefer RF
中科院分区:
其他
文献类型:
--
作者:
Günlü O;Kernetzky T;İşcan O;Sidorenko V;Kramer G;Schaefer RF

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比较用于将秘密密钥绑定到相关物理标识符输出的不同变换。解相关效率是用于确定给出高度不相关输出的变换的度量。标量量化器应用于变换输出,以提取绑定密钥的均匀分布的比特序列。一组在去相关效率方面表现良好的变换被应用于环形振荡器(RO)输出,以提高所提取的比特序列的唯一性和可靠性,减少关于密钥和RO输出的硬件面积和信息泄漏,并且最大化秘密密钥长度。提出了低复杂度的纠错码来说明两个完整的密钥绑定系统具有完美的保密性,以及更好的秘密密钥和隐私泄漏率比现有的方法。还提供了一个参考硬件实现,以证明变换编码的方法占用一个小的硬件面积。
Different transforms used in binding a secret key to correlated physical-identifier outputs are compared. Decorrelation efficiency is the metric used to determine transforms that give highly-uncorrelated outputs. Scalar quantizers are applied to transform outputs to extract uniformly distributed bit sequences to which secret keys are bound. A set of transforms that perform well in terms of the decorrelation efficiency is applied to ring oscillator (RO) outputs to improve the uniqueness and reliability of extracted bit sequences, to reduce the hardware area and information leakage about the key and RO outputs, and to maximize the secret-key length. Low-complexity error-correction codes are proposed to illustrate two complete key-binding systems with perfect secrecy, and better secret-key and privacy-leakage rates than existing methods. A reference hardware implementation is also provided to demonstrate that the transform-coding approach occupies a small hardware area.
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