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Digital Watermarking and Steganography by Frank Y. Shih Book Details
| Book Name | Digital Watermarking and Steganography: Fundamentals and Techniques |
| Author | Frank Y. Shih |
| Category | Electronics & Communication Engineering, Education Books |
| Book Language | English |
| Publisher | Taylor & Francis Group |
| Pages | 293 |
| ISBN | 9781498738774 |
| Country | India |
| Book Size | 17 MB |
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About Digital Watermarking and Steganography by Frank Y. Shih Book
Digital watermarking and steganography are two techniques used to embed hidden information within digital media files such as images, audio, video, and documents. Both techniques serve different purposes and have various applications, ranging from copyright protection to data hiding and covert communication.
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Digital Watermarking: Digital watermarking involves embedding a visible or invisible mark (watermark) into a digital media file to identify its origin, ownership, or some other relevant information. Watermarks are typically used for copyright protection, authentication, and tracking. There are two main types of digital watermarking:
a. Visible Watermarking: Visible watermarks are typically overlaid on the media content and are easily visible to the viewer. They often include logos, text, or symbols that identify the source or ownership of the content. Visible watermarks are commonly used on stock images and videos.
b. Invisible Watermarking: Invisible watermarks are embedded within the media content in a way that is not easily detectable by the human eye. They are designed to be robust against various transformations and attacks, such as cropping, compression, and filtering. Invisible watermarks are often used for tracking and copyright protection.
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Steganography: Steganography involves hiding information within the content of a digital media file in a way that is not readily apparent. The goal of steganography is to make the presence of the hidden information difficult to detect. Unlike watermarking, which aims to mark the content, steganography aims to hide the presence of the information.
Steganographic techniques can be applied to various types of media files, and they rely on exploiting the redundancy of the media format. For example, in an image, changes can be made to the least significant bits of pixel values without significantly altering the visual appearance of the image. In audio or video files, hidden information can be embedded in imperceptible changes to the waveform.
Applications of steganography include covert communication, digital forensics, and information hiding. It can be used for secure data transmission and to conceal sensitive information from unauthorized access.
Both digital watermarking and steganography have their own advantages and limitations. Watermarking is more suitable for scenarios where the marked information needs to be visible or easily detectable, such as protecting copyright or proving authenticity. Steganography, on the other hand, is designed for situations where the hidden information needs to be kept secret and is less likely to be detected.
It's important to note that while these techniques can be used for legitimate purposes, they can also be misused for malicious activities, such as hiding malware or conducting covert communication for illicit purposes. As a result, the use of digital watermarking and steganography has ethical and legal implications that should be carefully considered.
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