Block chain embedding method for wavelet domain watermark in image

Abstract

The invention discloses a block chain embedding method for a wavelet domain watermark in an image. The method comprises the following steps of 1, generating a watermark containing data blocks of a block chain; 2, embedding the generated watermark containing the data blocks of the block chain into the wavelet domain watermark; 3, extracting and verifying the wavelet domain watermark; and 4, updating watermark information in the block chain. According to the block chain embedding method for the wavelet domain watermark in the image, a watermark sequence is generated by utilizing the data blocksof the block chain; a block chain technology is introduced in a digital watermark, so that the security of image information is ensured and the watermark information is prevented from being tampered by any attack means; and by updating the data blocks of the block chain in the watermark, the watermark is not modified at will in a network transmission process, attack in an invalid network is avoided, and the information security in the transmission process is ensured.

Description

technical field [0001] The invention belongs to the technical field of wavelet domain watermarking, in particular to a block chain embedding method of wavelet domain watermarking in images. Background technique [0002] Digital watermarking is a high-efficiency and widely used method of information security assurance. By embedding hidden identification information in images, digital watermarking can achieve copyright protection, information tracking and other application purposes. There are two ways to embed the watermark, one is to embed the watermark in the air domain, and the other is to embed the watermark in the transform domain. The latter is favored by researchers and commercial applications due to its convenient information hiding characteristics and robustness to noise and filtering. The performance of digital watermarking technology based on wavelet transform is particularly prominent, also known as wavelet domain watermarking. The wavelet domain watermark decomp...

AI Technical Summary

Problems solved by technology

[0009] However, the existing wavelet domain watermarks have the disadvantages of being vulnerable to attacks and unable to maintain complete tracking. Various attack methods have been produced for different applications of digital watermarks. They will cause different amplitude changes in wavelet coefficients, and then maliciously tamper and destroy watermarks , leading to the failure of watermark extraction, seriously affecting the reliability and security of digital watermarking, and will cause huge economic losses to the application field

The watermark itself is vulnerable to attack, resulting in information being tampered with

Digital images containing watermarks either maintain the original information during the transmission process on the network, making it impossible to trace the source of the information; or add time stamp information, but the added information will also be attacked by the network during transmission. Damage caused by the confusion of the entire time stamp results in the failure of the entire delivery path and cannot be traced

[0010] In addition, although the identification information contained in the existing digital watermark maintains the accuracy of the source in the process of business transactions and online transmission, the change of the timestamp information in a single stage will lead to the failure of the entire user tracking

Images