Intelligent Reflecting Surface Assisted Secrecy Communication: Is Artificial Noise Helpful or Not?

Coding in Undirected Graphs Is Either Very Helpful or Not Helpful at All

While it is known that using network coding can significantly improve the throughput of directed networks, it is a notorious open problem whether coding yields any advantage over the multicommodity flow (MCF) rate in undirected networks. It was conjectured in [9] that the answer is ‘no’. In this paper we show that even a small advantage over MCF can be amplified to yield a near-maximum possible...

Performance Analysis of cooperative SWIPT System: Intelligent Reflecting Surface versus Decode-and-Forward

In this paper, we explore the impacts of utilizing intelligent reflecting surfaces (IRS) in a power-splitting based simultaneous wireless information and power transfer (PS-SWIPT) system and compare its performance with the traditional decode and forward relaying system. To analyze a more practical system, it is also assumed that the receiving nodes are subject to decoding cost, and they are on...

Guaranteeing Secrecy in Wireless Networks using Artificial Noise

The broadcast nature of the wireless medium makes the communication over this medium vulnerable to eavesdropping. This report considers the problem of secret communication between two nodes, over a fading wireless medium, in the presence of a passive eavesdropper. The assumption used is that the transmitter and its helpers (amplifying relays) have more antennas than the eavesdropper. The transm...

health communication what it is and what is not

Margaret McCartney: Privacy is not secrecy.

Celebrities die, just like the rest of us. And—shock!—sometimes they do it without first making a public pronouncement. But, when a celebrity dies without an announcement of illness or a disclosure of the type of cancer, grieving family and friends are often accused of keeping the illness “secret.” This, in the froth of social media and newspaper commentary, is seen as a “very bad thing.” Rathe...