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The same image viewed by white, blue, green, and red lights reveals different hidden numbers. Steganography (/ ˌ s t ɛ ɡ ə ˈ n ɒ ɡ r ə f i / ⓘ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination.
OpenPuff Steganography and Watermarking, sometimes abbreviated OpenPuff or Puff, is a free steganography tool for Microsoft Windows created by Cosimo Oliboni and still maintained as independent software. The program is notable for being the first steganography tool (version 1.01 released in December 2004) that:
In cryptography, encryption (more specifically, encoding) is the process of transforming information in a way that, ideally, only authorized parties can decode.
Steganography tools aim to ensure robustness against modern forensic methods, such as statistical steganalysis. Such robustness may be achieved by a balanced mix of: a stream-based cryptography process; a data whitening process; an encoding process.
The sender wants to send a message to the receiver ().In the simplest setup, Alice enumerates the symbols in her message and sends out each in a separate packet.If the symbols are complex enough, such as natural language text, an attacker may be able to distinguish the real symbols from poorly faked chaff symbols, posing a similar problem as steganography in needing to generate highly ...
While steganography aims for imperceptibility to human senses, digital watermarking tries to control the robustness as top priority. Since a digital copy of data is the same as the original, digital watermarking is a passive protection tool.
Modifying the echo of a sound file (Echo Steganography). [8] Steganography for audio signals. [9] Image bit-plane complexity segmentation steganography; Including data in ignored sections of a file, such as after the logical end of the carrier file. [10] Adaptive steganography: Skin tone based steganography using a secret embedding angle. [11]
These include components of GSM, GMR encryption, GPRS encryption, a number of RFID encryption schemes, and most recently Terrestrial Trunked Radio (TETRA). [11] One of the largest proponents of security through obscurity commonly seen today is anti-malware software.