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Most watermarking schemes for intellectual property (IP) protection embed authorship information at a single design abstraction level. Effective means to directly verify the watermark distributed at the downstream designs are lacking, particularly after the IP core is packaged into chip. This paper proposes a hybrid scheme for watermarking sequential designs. At behavioral level, the finite state...
This paper presents a new methodology of multiplierless implementation of inner-product computation. The inner-product computation is decomposed to form an architecture that facilitates an efficient serial accumulation of the 1's in the partial product matrix of each multiplication of a pair of elements from the input vectors. The 1's that appear at each partial product position are accumulated by...
Most VLSI watermarking techniques do not allow different authorships of multiple Intellectual Property (IP) cores to be detected directly in the field after the IPs have been integrated, fabricated and packaged into chip. Watermark inserted at the design-for-testability (DfT) stage makes its direct detection after chip packaging possible, but it protects only the downstream placement-and-routing design,...
This paper proposes an improved version of watermarking scheme at the Design-for-testability (DfT) stage for VLSI Intellectual Property (IP) protection. The improved scheme overcomes the weaknesses of previous scan chain watermarking scheme by imposing the extra ordering constraints generated by the IP owner's signature on all scan flip-flops impartially. IP authorship can be publicly authenticated...
This paper presents a new approach to serial/parallel multiplier design by using parallel 1psilas counters to accumulate the binary partial product bits. The 1psilas in each column of the partial product matrix due to the serially input operands are accumulated using a serial T-flip flop (TFF) counter. Consequently, the column height is reduced from N to [log2 N]+1. This logarithmic reduction results...
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