Covert communication method based on data package multilayer packaging
A communication method and data packet technology, which is applied in the field of covert communication based on multi-layer encapsulation of data packets, can solve the problems of covert channel reliability and low bandwidth, and achieve the effect of increasing reliability and transmission bandwidth
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[0051] Sender Alice:
[0052] Step 1: The sender Alice and the receiver Bob agree to use the application layer HTTP connection case encoding method, the low 16-bit field of the TCP initial serial number and the low 8-bit field of the IP ID as the hidden location; the sender performs binary encoding on the hidden information M and Encrypt, get ciphertext information M k , And then divide the ciphertext information into 8bit, 16bit, 8bit size in turn to generate (M k1 ,M k2 ,M k3 )sequence.
[0053] Step 2: Alice forges normal data packets at the application layer to hide information. Falsify the HTTP message header and put M in the ciphertext sequence k1 Hidden in the first 8 bits of the connection field, 1 represents uppercase, 0 represents lowercase, encapsulates the data packet, and transmits to the lower layer;
[0054] Step 3: When the transport layer receives the data packet delivered by the application layer, it will hide the information M k2 Hidden in th...
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