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Wireless local area networks (WLAN) are increasingly deployed and widespread worldwide due to the convenience and the low cost that characterized it. However, due to the broadcasting and the shared nature of the wireless medium, WLANs are vulnerable to many kinds of attacks. Although there are many efforts to improve the security of a wireless network, some attacks are inevitable. Attackers can send fake de-authentication or disassociation frames to end the session a victim leading to a denial of service, stolen passwords, and leaks of sensitive information among many other cybercrimes. Effectively detecting such attacks is crucial in today’s critical applications. However, the extant security standards are vulnerable to such an attack, and it is still an open research problem. In this paper, a scheme called D3MS is proposed to detect and mitigate de-authentication and disassociation attack effectively …