We assume that a buffer-aided transmitter communicates with a receiving node in the presence of an attacker. We investigate the impact of a radio-frequency energyharvesting attacker that probabilistically operates as a jammer or an eavesdropper. We show that even without the need for an external energy source, the attacker can still degrade the security of the legitimate system. We show that the random data arrival behavior at the transmitter and the channel randomness of the legitimate link can improve the system's security. We design a jamming scheme for the attacker and investigate its impact on the secure throughput of the legitimate system. The attacker designs his power splitting parameter and jamming/eavesdropping probability based on the energy state of the attacker's battery to minimize the secure throughput of the legitimate system. Index Terms-DoS, eavesdropping, energy harvesting. R ADIO-FREQUENCY (RF) energy-harvesting (EH) schemes enable charging of wireless nodes by exploiting energy of the ambient RF signals, where a wireless node converts the received RF transmissions into a direct current (DC). The two most promising schemes for RF energy harvesting are the time-switching scheme [1], where the receiver switches between data reception and energy harvesting, and the power-splitting scheme [1], where the receiver splits the signal into two streams of different powers for decoding information and harvesting energy separately to enable simultaneous information decoding and energy harvesting. Communication secrecy in an information-theoretic sense was first investigated in the seminal work of Wyner [2] which is known as physical (PHY) layer security. The PHY security is measured by the secrecy rate which is determined by the difference between the rates of the legitimate link and the eavesdropping link. Several works have investigated the impact of specific active malicious attacks such as denial-of-service (DoS) attacks [3], replay attacks [4] , and data injection attacks [5] . The DoS attack, which blocks the communication between legitimate transceivers, has received great attention as it is the most Manuscript
In REF , the behavior of a wireless powered adversary that can operate randomly as a jammer or an eavesdropper was investigated.
Probabilistic Jamming/Eavesdropping Attacks to Confuse a Buffer-Aided Transmitter–Receiver Pair
IEEE Communications Letters
IEEE Communications Letters
Computer Science Mathematics