What is digital image steganography?
Nowadays, digital steganography can be defined as the art of hiding secret messages behind the innocent looking digital media [4]. Jessica [2] defined steganography as the art of concealed communication where the existence of a message is secret.
Can steganography messages be hidden in digital images?
Steganography can be used for digital watermarking in which a message (being simply an identifier) is hidden in an image so that its source can be tracked or verified (for example, Coded Anti-Piracy) or even just to identify an image (as in the EURion constellation).
How does digital steganography work?
Steganography works by hiding information in a way that doesn’t arouse suspicion. One of the most popular techniques is ‘least significant bit (LSB) steganography. In this type of steganography, the information hider embeds the secret information in the least significant bits of a media file.
How can digital steganography be achieved?
In most cases, information is hidden in the pixels and extracted from them using special tools. To do so, modern steganographers sometimes write custom scripts, or add the required functionality to programs intended for other purposes. And occasionally they use ready-made code, of which there is plenty online.
What is masking and filtering steganography?
Masking and filtering While traditional steganography conceals information, watermarks extend information since it becomes an attribute of the cover image. Masking techniques hide information in such a way that the hidden message is more integral to the cover image than simply hiding data in the “noise” level.
Which algorithm is used in image steganography?
The steganographic algorithm uses one public key and one private key to generate a binary sequence of pseudorandom numbers that indicate where the elements of the binary sequence of a secret message will be inserted. The insertion takes eventually place at the first seven AC coefficients in the transformed DCT domain.
Which technique is used in steganography?
Steganography is the technique for hiding data and aims to hide data in such a way that any eavesdropper cannot observe any changes in the original media. The least significant bit (LSB) is one of the most public techniques in steganography. The classical technique is LSB substitution.
What are different types of steganography?
Depending on the nature of the cover object(actual object in which secret data is embedded), steganography can be divided into five types:
- Text Steganography.
- Image Steganography.
- Video Steganography.
- Audio Steganography.
- Network Steganography.
What are the methods of steganography?
Steganographic Technique
- Digital Watermarking.
- Voice over Internet Protocol.
- Detection Algorithm.
- Detection Method.
- Watermarking Technique.
- Trojans.