Restorable double-core-shell watermark authentication method based on FPGA (Field Programmable Gate Array) technology

Abstract

The invention discloses a restorable double-core-shell watermark authentication method based on an FPGA (Field Programmable Gate Array) technology. The method comprises the following steps of: firstly, taking watermark information to be restored as a restoring factor by using a threshold secret sharing scheme; then, compressing watermark preprocessing information in a way of creating a special expression combination, and establishing a mapping relationship between the restoring factor and the watermark information to be restored; and next, embedding self-restored watermark information through inserting a redundancy attribute label of an unused LUT (Look Up Table) in a bitfile self-constraint file designed by an FPGA. Experimental tests and results show that the method disclosed by the invention can be used for ensuring that a watermark can still effectively restore the original watermark information after being subjected to removal attack to a certain extent. Meanwhile, the method also has the advantages of small resource expense, high watermark embedding information capacity, strong robustness and the like.

Description

technical field [0001] The invention relates to a watermark authentication method, in particular to a recoverable dual-core watermark authentication method based on FPGA technology. Background technique [0002] With the rapid development of semiconductor manufacturing technology in the world, the number of transistors on a single chip of very large scale integration (VLSI) can increase to 100 billion by 2015. However, every 12 months, the chip manufacturing capacity increases by about 58%, but the design capacity can only increase by 21%, resulting in a widening gap between the chip manufacturing capacity and the design capacity. design needs. Digital IP multiplexing technology spreads in the form of a specific host carrier, which is easily obtained by illegal users and copied and tampered with for their own use, which can easily bring huge losses to IP design companies. Therefore, in order to solve the problems of core (IP) product design level, reduce product cost, shor...

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Problems solved by technology

[0009] In the above watermark security protection schemes, although researchers have proposed many effective watermark schemes, most of these schemes do not have the function of self-recovery. Once the watermark information is damaged, it cannot be effectively recovered.

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