A New Look at Secrecy Capacity of Mimome Using Artificial Noise From Alice and Bob Without Knowledge of Eve’s Csi

Abstract

This study investigates a secure wireless communication scheme which combines two of the most effective strategies to combat (passive) eavesdropping, namely mixing information with artificial noise at the transmitter and jamming from a full-duplex receiver. All nodes are assumed to possess multiple antennas, which is known as a MIMOME network. The channel state information (CSI) of Eve is known to Eve but not to Alice and Bob. While such setup has been investigated in related works, new and important insights are revealed in this work. We investigate the design of optimal jamming parameters to achieve higher secrecy, and in particular we focus on two important cases corresponding to Bob using either a simple jamming or a smart jamming. Furthermore, simulations are presented to highlight the effectiveness of the proposed strategies.

Secrecy Analyses of a Full-Duplex MIMOME Network

“…It is shown in our earlier work [36] that the most harmful position of Eve is at x * = −0.5 − ∆ and y * = 0. From now on, we will refer to a and b as corresponding to the position (x * , y * ).…”

“…Algorithm 1 details the proposed procedure for the power optimization. It is worth mentioning that a different optimization approach was explored in our previous work [36], where a stochastic optimization approach was applied to the objective function R AB − E[R AE ]. These two approaches more or less give the same results, but Algorithm 1 in this paper has a significantly lower complexity.…”

“…These two approaches more or less give the same results, but Algorithm 1 in this paper has a significantly lower complexity. To illustrate a performance gain of the optimized powers over non-optimal powers, we will not repeat similar figures as available in [36]. But next we consider the maximum tolerable number of antennas on Eve, which can be defined in several ways.…”

Realizing Efficient Security and Privacy in IoT Networks

“…So far, the wireless channels rate of secrecy has been explored from several perspectives like in [9,10]. The different perspectives explored are as follows, the fading channels secrecy [9][10][11], the analysis of Gaussian wiretap channels secrecy of [11], the multiple antenna systems secrecy [13][14][15], the broadcast channels secrecy [16], the analysis of secure degrees of freedom [17][18][19][20][21], and the secrecy of cooperative jamming techniques coupled with helpers or relays [22][23][24][25][26][27][28][29].…”

“…This method is known as cooperative jamming. The noise-forwarding approach which was introduced in [24], and applied in a channel comprising of four-terminal relay-eavesdropper also considered a full-duplex relay, which independently transmits secret messages codewords which are targeted at complicating the eavesdropper's transmission. The authors of [44] investigated a two-stage cooperative jamming scheme (TSCS) which involves multiple relay nodes acting as the single-antenna's source node extension.…”