@article {Bouabdellah20211266,
	title = {A PHY Layer Security of a Jamming-Based Underlay Cognitive Satellite-Terrestrial Network},
	journal = {IEEE Transactions on Cognitive Communications and Networking},
	volume = {7},
	number = {4},
	year = {2021},
	note = {cited By 1},
	pages = {1266-1279},
	abstract = {In this work, we investigate the physical layer security of a jamming-based underlay cognitive satellite-terrestrial network consisting of a radio frequency link at the first hop and an optical feeder at the second hop. Particularly, one secondary user (SU) is transmitting data to an end-user optical ground station through the aid of a relay satellite, in the presence of an active eavesdropper at each hop. Moreover, another SU located in the first hop is acting as a friendly jammer and continuously broadcasting an artificial noise that cannot be decoded by the wiretapper so as to impinge positively on the system{\textquoteright}s secrecy. Owing to the underlying strategy, the SUs are permanently adjusting their transmit powers in order to avoid causing harmful interference to primary users. The RF channels undergo shadowed-Rician and Rayleigh fading models, while the optical link is subject to Gamma-Gamma turbulence with pointing error. Closed-form and asymptotic expressions for the intercept probability (IP) are derived considering two different scenarios regardless of the channel{\textquoteright}s conditions, namely (i) absence and (ii) presence of a friendly jammer. The effect of various key parameters on IP, e.g., sources{\textquoteright} transmit power, artificial noise, maximum tolerated interference power, and fading severity parameters are examined. Precisely, we aim to answer the following question: could a friendly jammer further enhance the security of such a system even in a low SNR regime? All the derived results are corroborated by Monte Carlo simulations and new insights into the considered system{\textquoteright}s secrecy are gained. {\textcopyright} 2021 IEEE.},
	keywords = {Asymptotic expressions, Cognitive radio, Harmful interferences, Interference power, Internet protocols, Jamming, Monte Carlo methods, Network security, Optical ground station, Physical layer, Physical layer security, Radio frequency links, Rayleigh fading, Rayleigh fading model, Satellite-terrestrial network, Satellites, Signal to noise ratio},
	doi = {10.1109/TCCN.2021.3074909},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104654956\&doi=10.1109\%2fTCCN.2021.3074909\&partnerID=40\&md5=c6b346366a5ab939d4e711d4cb19a435},
	author = {Bouabdellah, M. and Bouanani, F.E.}
}
@conference {Bouabdellah2020,
	title = {Hybrid Very High Throughput Satellites: Potential, Challenges, and Research Directions},
	booktitle = {2020 8th International Conference on Communications and Networking, ComNet2020 - Proceedings},
	year = {2020},
	note = {cited By 4},
	abstract = {Hybrid terrestrial-satellite transmission systems have been among hottest spots in the wireless communication industry due to the high demand for global high data rates. In such systems, free-space optical (FSO) technology is advocated for assessing the feeder links (ground-satellite) in order to fulfill high data rates requirements and provide a larger coverage in terms of the connected number of users. This paper gives an overview of various components of very-high throughput hybrid terrestrial-satellite communication system with an FSO feeder link, and Ka-band multibeam RF channels for the satellite ground link. In this survey paper, we depict the main communication challenges in the FSO side such as pointing error, turbulence, cloud blockage, and also the multibeam RF side such as spectrum scarcity, inter-beam interference, and security. Based on these challenges we point out some potential research directions. {\textcopyright} 2020 IEEE.},
	keywords = {Free-space optical, High data rate, High throughput, Inter-beam interference, Pointing errors, Potential researches, Power control, Satellite communication systems, Satellite links, Satellite transmission, Satellites, Wireless communications},
	doi = {10.1109/ComNet47917.2020.9306099},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100003768\&doi=10.1109\%2fComNet47917.2020.9306099\&partnerID=40\&md5=ab22ef8fab218cbdde68b99793a394e3},
	author = {Bouabdellah, M. and Illi, E. and Bouanani, F.E. and Alouini, M.-S.}
}
@article {Bouabdellah2020704,
	title = {A PHY Layer Security Analysis of Uplink Cooperative Jamming-Based Underlay CRNs with Multi-Eavesdroppers},
	journal = {IEEE Transactions on Cognitive Communications and Networking},
	volume = {6},
	number = {2},
	year = {2020},
	note = {cited By 17},
	pages = {704-717},
	abstract = {In this paper, the physical layer security of a dual-hop underlay uplink cognitive radio network is investigated over Nakagami-m fading channels. Specifically, multiple secondary sources (S_i)_1{\l}eq i{\l}eq N are taking turns in accessing the licensed spectrum of the primary users and communicating with a multi-antenna secondary base station (D) through the aid of a multi-antenna relay R in the presence of M eavesdroppers (E_k)_1{\l}eq k{\l}eq M that are also equipped with multiple antennas. Among the remaining nodes, one jammer is randomly selected to transmit an artificial noise to disrupt all the eavesdroppers that are attempting to intercept the communication of the legitimate links, i.e., S_i-R and R-D. The received signals at each node are combined using maximum-ratio combining. Secrecy analysis is provided by deriving closed-form and asymptotic expressions for the secrecy outage probability. The impact of several key parameters on the system{\textquoteright}s secrecy, e.g., transmit power of the sources, number of eavesdroppers, maximum tolerated interference power, and the number of diversity branches is investigated. Importantly, by considering two scenarios, namely (i) absence and (ii) presence of a friendly jammer, new insights are obtained for the considered communication system. Especially, we tend to answer to the following question: Can better secrecy be achieved without jamming by considering a single antenna at eavesdroppers and multiple-ones at the legitimate users (i.e., relay and end-user) rather than sending permanently an artificial noise and considering that both the relay and the destination are equipped with a single antenna, while multiple antennas are used by the eavesdroppers? The obtained results are corroborated through Monte Carlo simulation and show that the system{\textquoteright}s security can be enhanced by adjusting the aforementioned parameters. {\textcopyright} 2015 IEEE.},
	keywords = {Antennas, Asymptotic expressions, Cognitive radio, Cognitive radio network, Fading (radio), Fading channels, Intelligent systems, Jamming, Maximum ratio combining, Monte Carlo methods, Multi eavesdroppers, Multi-antenna relay, Nakagami-m fading channels, Physical layer, Physical layer security, Secrecy outage probabilities, Secure communication, Silicon},
	doi = {10.1109/TCCN.2019.2957081},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083785882\&doi=10.1109\%2fTCCN.2019.2957081\&partnerID=40\&md5=b3545ea32455c8abbf9fffef83e08cf0},
	author = {Bouabdellah, M. and El Bouanani, F. and Alouini, M.-S.}
}
@article {Bouabdellah201840,
	title = {Network layer attacks and countermeasures in cognitive radio networks: A survey},
	journal = {Journal of Information Security and Applications},
	volume = {38},
	year = {2018},
	note = {cited By 0},
	pages = {40-49},
	abstract = {Spectrum scarcity is the principal motivation behind the development of cognitive radio. This technology introduces new functionalities at the physical, medium access control, and network layers of the TCP/IP protocol stack. These functionalities can be subject to new security threats. Most of the existing works in cognitive radio focused on the security issues in both the physical and medium access control layers. However, threats related to the network layer have not been studied despite its importance in establishing communication between different users in cognitive radio networks. In this paper, we classify and give an overview of attacks that target the network layer functionalities of cognitive radio networks. We discuss the existing detection techniques and countermeasures and highlight the main security challenges for such networks. {\textcopyright} 2017 Elsevier Ltd},
	doi = {10.1016/j.jisa.2017.11.010},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037523873\&doi=10.1016\%2fj.jisa.2017.11.010\&partnerID=40\&md5=e932d332e0495cc6658b35adcd2ea4a4},
	author = {Bouabdellah, M. and Kaabouch, N. and El Bouanani, F. and Ben-Azza, H.}
}
@article {Bouabdellah201840,
	title = {Network layer attacks and countermeasures in cognitive radio networks: A survey},
	journal = {Journal of Information Security and Applications},
	volume = {38},
	year = {2018},
	pages = {40-49},
	doi = {10.1016/j.jisa.2017.11.010},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037523873\&doi=10.1016\%2fj.jisa.2017.11.010\&partnerID=40\&md5=e932d332e0495cc6658b35adcd2ea4a4},
	author = {Bouabdellah, M. and Kaabouch, N. and El Bouanani, F. and Ben-Azza, H.}
}
@conference {Bouabdellah201870,
	title = {Secrecy outage performance for dual-hop underlay cognitive radio system over nakagami-m fading},
	booktitle = {ACM International Conference Proceeding Series},
	year = {2018},
	pages = {70-75},
	doi = {10.1145/3289100.3289112},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058649293\&doi=10.1145\%2f3289100.3289112\&partnerID=40\&md5=cbb8800324a876dc6cd5477d40de937c},
	author = {Bouabdellah, M. and Bouanani, F.E. and Benazza, H.}
}
@conference {Bouabdellah20181,
	title = {Secrecy outage probability in cognitive radio networks subject to Rayleigh fading channels},
	booktitle = {Proceedings - 2018 International Conference on Advanced Communication Technologies and Networking, CommNet 2018},
	year = {2018},
	pages = {1-5},
	doi = {10.1109/COMMNET.2018.8360281},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048325751\&doi=10.1109\%2fCOMMNET.2018.8360281\&partnerID=40\&md5=0e696334d57d007731bf272268a1e1fe},
	author = {Bouabdellah, M. and El Bouanani, F. and Ben-Azza, H.}
}
@conference {Bouabdellah2017,
	title = {A secure cooperative transmission model in VANET using attribute based encryption},
	booktitle = {2016 International Conference on Advanced Communication Systems and Information Security, ACOSIS 2016 - Proceedings},
	year = {2017},
	note = {cited By 1},
	abstract = {Cooperative transmission in vehicular ad-hoc networks (VANET) seems to be an efficient solution when no direct transmission between the source and the destination is possible. However, secure reception of the message at the destination through not necessarily honest relays remains a crucial problem to solve in VANET. In this paper, we propose a trust cooperative transmission protocol for multiple-hops broadcast in VANET which selects among all relays only the best ones minimizing a function of finite number of metrics. Our proposed protocol uses cryptography to ensure a confidential communication between the source and the destination. As the vehicle broadcast the safety message thus, the primitive of cryptography which can be used is Ciphertext-policy attribute based encryption (CP-ABE), because this primitive provides an encrypted access control mechanism for broadcasting messages. {\textcopyright} 2016 IEEE.},
	doi = {10.1109/ACOSIS.2016.7843940},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85015190363\&doi=10.1109\%2fACOSIS.2016.7843940\&partnerID=40\&md5=8080247d3ffdd9caadd219b38b216bae},
	author = {Bouabdellah, M. and El Bouanani, F. and Ben-Azza, H.}
}
