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covert channel

A Covert Channel is a covert communication channel through which information is transmitted. Such a channel is parasitic in nature and uses third party transmission media or information content to deliver its messages.

In any case, the covert channel affects the bandwidth or transmission rate of the original transmission.

A covert channel is not necessarily a transmission channel. The parasitic information can be transmitted through a physical channel, but it can also be mixed with another information content as in the case of steganography. Another example is watermarking, which uses the blanking intervals of a television picture, or the transmission of information in pauses in speech.

Englisch: covert channel
Updated at: 28.07.2015
#Words: 103
Links: communication (COM), channel, information, third, transmission
Translations: DE

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