In this letter, the use of intelligent reflecting surface (IRS) to enhance physical layer security downlink wireless communication is investigated. Assuming a single-antenna legitimate user and multi-antenna eavesdropper, we propose an effective algorithm jointly optimize active passive beamforming. proposed algorithm, optimal transmit beamforming vector at BS under fixed IRS phase shifts deriv...

This paper proposes a lightweight and low energy encryption algorithm to secure voice traffic over wireless networks. The proposed meets the requirements of is suitable for devices. It capable reduce execution time power consumption process compared with state art standard at same maintains desired security (confidentiality) level. employs similar methods those used in Advanced Encryption Stand...

Trusted operating systems (OS) provide the basic security mechanisms and services that allow a computer system to protect, distinguish, and separate classified data. Trusted operating systems have been developed since the early 1980s and began to receive National Security Agency (NSA) evaluation in 1984. The researches about trusted OS are proceeding over the world, and new product type using t...

the study sought to explore approaches for co-creation of conservation agriculture (ca) knowledge amongst farmers, nongovernmental organizations (ngos), government and specialist researchers. the aim of the study was to explore farmer initiated food security strategies among small holder resource poor farmers, through enhancement of farmers’ own productive capacity. the study was born out of th...