Method for affirming IP nuclear publishing rights by using digital watermarking technology

Abstract

The invention provides a method for acknowledging an IP core copyright by a digital watermarking technology. The method has the advantages of low cost, high universality, high compatibility, high feasibility and fully integrated automation. The technical scheme is that the method is characterized by comprising a watermark embedding step and a watermark extracting step. The watermark embedding steps comprises the following procedures: first, selecting a coordinate of an initial watermark point in a layout, and processing copyright information by a one-way Hash function to obtain an offset of the watermark point coordinate, and obtaining the scattered watermark point coordinate pseudo-randomly distributed in the layout; and then normalizing the attribute of the selected watermark point to embed the special watermark representing the copyright information; and finally, successfully embedding the watermark information for the watermark point which is not normalized by the two methods by repeated diffusion, judgment and additional means, thus obtaining a layout data file with the watermark information. The watermark extracting step comprises the following procedures: obtaining the pseudo-randomly scattered watermark point coordinate by the method similar to the watermark embedding step based on record files of the watermark embedding information, thus recovering the watermark point coordinate successfully embedded finally and then judging whether the watermark point successfully embedded finally coincides with a polysilicon layer in the layout and outputting a watermark extraction report.

Description

technical field

[0001] The invention belongs to the technical field of digital watermarking of IP core integrated circuits, in particular to a method for confirming IP core copyright by utilizing the digital watermarking technology. Background technique

[0002] With the rapid development of integrated circuit technology and industry, integrated circuit design methods are also constantly improving. Designers hope to integrate more functions into a single chip. At the same time, the pressure from market demand requires more starting points. Design, shorter design cycle, more powerful design productivity. Therefore, the SOC (System on Chip, System-on-Chip) design idea based on the software-hardware co-design based on IP reuse has become the mainstream of today's design methodology. Among them, IP core is the abbreviation of integrated circuit core with intellectual property (Intellectual Property). With the joint efforts of IP suppliers, third-party ASIC library suppliers, IP...

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