Cooperative communication (CC) can be explored to counter eavesdropping. Relaying and jamming are the sub techniques of (CC). However, Jamming is used to counter the strong eavesdroppers. Is there any other technique except Jamming to counter strong eavesdroppers in the network?
You can secure CDMA codes for communication between transmitter and receiver.
Exploiting multiple relay mechanisms. it can counter the effect of eavesdropper in a network
You can use cryptography with more than 512-bits keys, and special signals on a physical level, such as Nonorthogonal FDM (N-OFDM) with the coding of frequency positions:
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In the case of using the digital antenna array in a transmitter, you can direct to the enemy receiver the jammer signals together with the transmitting of communication signals if the direction to the enemy receiver is different from direction to correspondents.
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