In general, detection is the extraction of intelligence from a carrier signal in a communication system. Note that this may be either an overt signal, as in a conventional radio broadcast, or a covert signal, as in steganography. Jump to: navigation, search Intelligence has several different meanings: Intelligence (trait) is the ability to solve problems Animal intelligence Artificial intelligence Intelligence (journal), a scientific journal dealing with intelligence and psychometrics Intelligence (information gathering), often including espionage Business intelligence Criminal intelligence Military intelligence This is a disambiguation page, a list... Jump to: navigation, search Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but...

In opto-electronic systems, the generation of an electrical signal in response to a received optical input. For example, the optical signal received from an optical fiber is converted to an electrical signal in a detector, often a photodiode. Jump to: navigation, search A photodiode A photodiode is an electronic component and a type of photodetector. ...

In radio systems, the extraction of an AM signal from its carrier frequency. Jump to: navigation, search Amplitude modulation (AM) is a form of modulation in which the amplitude of a carrier wave is varied in direct proportion to that of a modulating signal. ... Jump to: navigation, search In general, a carrier is a system or process with a specific property or is attributed of something (in physical or in abstract sense). ...

In steganography, attempts to detect encoded intelligence from suspected carrier material is referred to as steganalysis. Steganalysis has an interesting difference from most other types of detection, in that it can often only produce the probability of the existence of payload material encoded in the carrier; this is in contrast to the detection of signals which are simply encrypted, as the ciphertext can often be detected with certainty, even if it cannot be decoded. Jump to: navigation, search Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but... Steganalysis is the art and science of detecting messages hidden using steganography; this is comparable to cryptanalysis applied to cryptography. ... The word probability derives from the Latin probare (to prove, or to test). ... This article is about algorithms for encryption and decryption. ... This article is about algorithms for encryption and decryption. ...

The art of detection a.k.a. following clues, is the work of any detective. Jump to: navigation, search A detective is an officer of the police who performs criminal or administrative investigations, in some police departments, the lowest rank among such investigators (above the lowest rank of officers and below sergeants), a civilian licensed to investigate information not readily available in public records (a...

• http://www.ucs.mun.ca/~tlai/DOtemp.pdf