Channel hopping scheme to mitigate jamming attacks in wireless LANs

Aims The ongoing COVID-19 pandemic has disrupted and delayed medical and surgical examinations where attendance is required in person. Our article aims to outline the validity of online assessment, the range of benefits to both candidate and assessor, and the challenges to its implementation. In addition, we propose pragmatic suggestions for its introduction into medical assessment. Methods We reviewed the literature concerning the present status of online medical and surgical assessment to establish the perceived benefits, limitations, and potential problems with this method of assessment. Results Global experience with online, remote virtual examination has been largely successful with many benefits conferred to the trainee, and both an economic and logistical advantage conferred to the assessor or organization. Advances in online examination software and remote proctoring are overcoming practical caveats including candidate authentication, cheating prevention, cybersecurity, and IT failure. Conclusion Virtual assessment provides benefits to both trainee and assessor in medical and surgical examinations and may also result in cost savings. Virtual assessment is likely to be increasingly used in the post-COVID world and we present recommendations for the continued adoption of virtual examination. It is, however, currently unable to completely replace clinical assessment of trainees. Cite this article: Bone Jt Open 2021;2(2):111–118.

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“…This can be mitigated by incorporation of dynamic path identifiers, fuzzy reasoning-based windows firewall, or channel hopping. 53 - 55 …”

Section: Resultsmentioning

confidence: 99%

Virtual exams: has COVID-19 provided the impetus to change assessment methods in medicine?

et al. 2021

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“…Specifically, it may turn that the generated processing gain is still not large enough to overcome the effects of some jammers, which is same cases, resort to different strategies. One way to get around this problem is by randomly hopping the data modulated carrier from one frequency to another [22], [23]. In this type of spread spectrum, the spectrum of the transmitted signal is spread sequentially instead of instantaneously.…”

Section: )mentioning

confidence: 99%

Smart Jamming Attacks in 5G New Radio: A Review

Arjoune

Faruque

2020

2020 10th Annual Computing and Communication Workshop and Conference (CCWC)

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The fifth generation of wireless cellular networks (5G) is expected to be the infrastructure for emergency services, natural disasters rescue, public safety, and military communications. 5G, as any previous wireless cellular network, is vulnerable to jamming attacks, which create deliberate interference to hinder the communication of legitimate users. Therefore, jamming 5G networks can be a real threat to public safety. Thus, there is a strong need to investigate to what extent these networks are vulnerable to jamming attacks. For this investigation, we consider the 3GPP standard released in 2017, which is widely accepted as the primary reference for the deployment of these networks. First, we describe the key elements of 5G New Radio (NR) architecture, such as different channels and signals exchanged between the base station and user equipment. Second, we conduct an in-depth review of the jamming attack models and we assess the 5G NR vulnerabilities to these jamming attacks. Then, we present the state-of-the-art detection and mitigation techniques, and we discuss their suitability to defeat smart jammers in 5G wireless networks. Finally, we provide some recommendations and future research directions at the end of this paper.

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“…Channel hopping is a link-layer technology, and it is easy to use compared with frequency hopping. This approach can be applied to existing wireless devices without frequency-hopping features [31]. The channel-hopping scheme can be either proactive or reactive.…”

Section: Related Workmentioning

confidence: 99%

“…In particular, there are issues related to synchronization, scalability, loss of packets, and latency [13]. Djuraev et al [31] proposed a channel-hopping scheme without prior channel agreement. However, the scheme considers the scenario of only a single user and a single AP.…”

Section: Related Workmentioning

confidence: 99%

“…RSS is currently the channel parameter most frequently used in key generation, especially for practical implementation, due to its availability. Numerous RSS-based key generation systems have been proposed [14,15,31,38]. In our previous work, we generated a key based on the received signal strength by dividing RSS values into groups.…”

Section: Initial Key Generationmentioning

confidence: 99%

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Channel-Hopping-Based Jamming Mitigation in Wireless LAN Considering Throughput and Fairness

Djuraev

Nam

2020

Electronics

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Because of the popularity of wireless technology, jamming attack is one of the most critical issues in wireless networks. Wireless jamming attack is one type of denial-of-service attacks where attackers send malicious messages or signal on a legitimate channel by causing intentional interference in the network. In order to avoid jamming attacks, various jamming defense schemes have been proposed. One of the popular methods is a channel-hopping scheme. However, the main challenge of this method is generating a common channel number between the users and the access point without leaking that information to the jammer. We propose a new channel-hopping scheme where the access point shares a separate key with each user to isolate the damage on the network when a key has been compromised, while maintaining high throughput and fairness. We evaluate the proposed scheme through experiment on a test bed.

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Channel hopping scheme to mitigate jamming attacks in wireless LANs

Cited by 21 publications

References 32 publications

Virtual exams: has COVID-19 provided the impetus to change assessment methods in medicine?

Virtual exams: has COVID-19 provided the impetus to change assessment methods in medicine?

Smart Jamming Attacks in 5G New Radio: A Review

Channel-Hopping-Based Jamming Mitigation in Wireless LAN Considering Throughput and Fairness

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