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کانالهای زمانبندی
Covert channels are classified into two types: storage and timing channels.
Reliable timing channels are a bit harder to find because often there are many processes that may affect the timing of a device, and the scheduling of the device may not always be so advantageous to communication.
In addition to the source whose timing behavior may be affected, timing channels also require synchronized clock.
While it is at least theoretically possible to remove all covert storage channels from a system, timing channels cannot be completely removed.
Techniques to address timing channels, such as fuzzy time [140, 311], involve reducing the bandwidth of channels by randomizing their timing behavior.
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