steganography
21Steganographie — Die Steganographie (auch: Steganografie) ist die Kunst oder Wissenschaft der verborgenen Speicherung oder Übermittlung von Informationen in einem Trägermedium (Container). Das Wort lässt sich auf die altgriechischen Bestandteile στεγανός steganós …
22stego — v. To hide secret information electronically by embedding it inside an ordinary file such as an image or sound clip. Example Citation: Something is stegoed in the wired world when encrypted words, diagrams, maps or images are embedded into an… …
23Espionage — Spy and Secret agent redirect here. For other uses, see Spy (disambiguation) and Secret agent (disambiguation). For other uses, see Espionage (disambiguation). Espionage or spying involves an individual obtaining information that is considered… …
24Invisible ink — Invisible ink, also known as security ink, is a substance used for writing, which is invisible either on application or soon thereafter, and which later on can be made visible by some means. Invisible ink is one form of steganography, and it has… …
25Covert channel — In computer security, a covert channel is a type of computer security attack that creates a capability to transfer information objects between processes that are not supposed to be allowed to communicate by the computer security policy. The term …
26Null cipher — A null cipher is an ancient form of encryption where the plaintext is mixed with a large amount of non cipher material. It would today be regarded as a simple form of steganography. Null ciphers can also be used to hide ciphertext, as part of a… …
27Johannes Trithemius — (1 February 1462 13 December 1516) was born Johann Heidenberg. He was an abbot and occultist who had an influence on later occultism. The name by which he is more commonly known is derived from his native town of Trittenheim on the Mosel in… …
28Polybius square — In cryptography, the Polybius square, also known as the Polybius checkerboard, is a device invented by the Ancient Greek historian and scholar Polybius, described in [http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Polybius/10*.html#45.6 Hist.… …
29Digital watermarking — An image with visible digital watermarking the text Brian Kell 2006 is visible across the center of the image Digital watermarking is the process of embedding information into a digital signal which may be used to verify its authenticity or the… …
30Friend-to-friend — A friend to friend (or F2F) computer network is a type of peer to peer network in which users only make direct connections with people they know. Passwords or digital signatures can be used for authentication.Many F2F networks support indirect… …
