phcct (protocol hopping covert channel tool) is a tiny and basic proof of concept implementation of a protocol hopping covert channel.
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Whitepaper titled Protocol Hopping Covert Channels - Protocol Hopping Covert Channels (PHCC) are a way to realize covert channels that switch between different protocols while a covert channel is established. PHCCs even can use a randomized protocol order and a mixed packet order to transfer packets what makes them hard to detect.
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