Can steganography be reversed?
A reversible steganographic method allows to extract data from the stego file as well as to retrieve the cover file. This paper proposes a reversible steganographic method based on interpolation by linear box-splines on the three directional mesh.
What is the reverse process of steganography?
Steganography hides a message in a cover medium, but no one understands hidden message’s existence unless he is aware of it. Steganalysis [2] is the opposite procedure of steganography. Primarily, we try to detect the existence of steganographic content in a digital device and secondly discover the hidden message.
How would you decrypt a steganography image?
Decode image To decode a hidden message from an image, just choose an image and hit the Decode button. Neither the image nor the message that has been hidden will be at any moment transmitted over the web, all the magic happens within your browser.
Are countermeasures employed against steganography?
Historically the countermeasures against steganography are not regarded as important as steganography. The research of the countermeasures is usually used as a test bench for the steganograph research.
What is steganography give an example?
Steganography has been widely used for centuries. Some examples include: Hidden messages on a paper written in secret inks. Hidden messages distributed, according to a certain rule or key, as smaller parts (e.g. words or letters) among other words of a less suspicious cover text.
How is steganography produced in a printed document?
Digital steganography output may be in the form of printed documents. A message, the plaintext, may be first encrypted by traditional means, producing a ciphertext. Then, an innocuous cover text is modified in some way so as to contain the ciphertext, resulting in the stegotext.
How does the hidden message work in steganography?
Messages are fractionalized and the (encrypted) pieces are added as comments of orphaned web-logs (or pin boards on social network platforms). In this case, the selection of blogs is the symmetric key that sender and recipient are using; the carrier of the hidden message is the whole blogosphere.
Is the science of steganography in the future?
The science of digital steganography is expected to draw more attention in the future. Its use can benefit wide arrays of user segments. Nearly all people who use computers, tablets, and smartphones need to use at least one hiding technique in order to protect their private data.
Who was the first person to use steganography?
Traces of steganography already existed in ancient Greece, when Herodotus narrated two examples in his Stories, but the first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book about magic.