The information is embedded in the content and cannot be removed by normal usage. These tasks make it an alternative (or complementary) to cryptography. Digital-to-analog conversion, compression, file format changes, re-encryption, and decryption can also be survived through digital image watermarking techniques. To discern the difference between digital watermarking and other technologies such as encryption is essential. Therefore, after an attack, it is possible to obtain information about the transformation from the watermark. It is not very easy to eliminate a watermark by displaying or converting the watermarked data into other file formats. These methods ensure tamper-resistance, authentication, content verification, and integration of the image.

Digital image watermarking is a technique in which watermark data is embedded into a multimedia product and, later, is extracted from or detected in the watermarked product. Digital content can easily be illegally possessed, duplicated, and distributed through a physical transmission medium during communications, information processing, and data storage. Any digital content, such as images, audio, and videos, can hide data.

Digital image watermarking is simply the digital watermarking of an image, which provides an alternative solution for ensuring tamper-resistance, the ownership of intellectual property, and reinforcing the security of multimedia documents. Therefore, content authentication, copyright protection, and protection against duplication play an essential role in facing the challenges of the existing and upcoming threats in maintaining digital information. Network technology has been developing and progressing so quickly that it threatens the privacy and security of data. Image processing and the internet have made it easier to duplicate, modify, reproduce, and distribute digital images at low cost and with approximately immediate delivery without any degradation of quality.

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