Provably secure obfuscation of diverse watermarks for sequential circuits

F. Koushanfar, Y. Alkabani
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引用次数: 41

Abstract

This paper presents a provably secure method for embedding multiple watermarks in sequential designs. A number of different watermarks signed with the IP owner's secret key from a public key cryptography system are generated. The owner's watermarks are then dissembled into the states and transitions of the original sequential design. Hiding the multiple watermarks in the states and transitions is shown to be an instance of obfuscating a multi-point function with a generalized output. We draw on the theoretical cryptographic results of provable obfuscation of this function family to build a secure sequential multi-watermark system by construction. An iterative synthesis method for integrating the collection of watermarks to the original design is introduced. Analysis of watermark properties and the attack resiliency of the new multiple watermarking construction is presented. Experimental evaluations on benchmark circuits demonstrate practicality and low overhead of the new provably secure multiple watermarks construction method.
可证明的安全混淆的各种水印的顺序电路
提出了一种在序列设计中嵌入多个水印的可证明的安全方法。使用来自公钥加密系统的IP所有者的密钥签名的许多不同的水印将被生成。然后将所有者的水印隐藏到原始序列设计的状态和转换中。隐藏状态和转换中的多个水印是混淆具有广义输出的多点函数的一个实例。利用该函数族可证明混淆的理论密码学结果,通过构造构建了一个安全的顺序多水印系统。介绍了一种将水印集合与原始设计相结合的迭代综合方法。分析了新的多重水印结构的水印特性和抗攻击能力。在基准电路上的实验评估表明了该方法的实用性和低开销。
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