【Author】
El Azzaoui, Abir; Choi, Min Yeong; Lee, Chang Hoon; Park, Jong Hyuk
【Source】HUMAN-CENTRIC COMPUTING AND INFORMATION SCIENCES
【Abstract】Currently, the world is experiencing a global pandemic due to the spread of coronavirus disease 2019 (COVID19), a disease stemming from a novel coronavirus. The main measure used to contain the rapid spread and to control this virus's contamination rate is social distancing. This method has dramatically affected citizens' daily lives. To this end, replacing face-to-face meetings with virtual meetings using cloud videoconferencing application solutions has emerged. This approach has indeed solved this problem for millions of schools, companies, governments, and individuals worldwide. However, security and privacy concerns arise. The number of videoconferencing users has increased during the pandemic, yet some applications offer only unencrypted communication for unpaid users. Moreover, uninvited attendees can join virtual meetings, collect sensitive information about users and shared files, and participate in them using deepfake tools. To resolve this dilemma, we propose in this paper a lightweight, scalable blockchain-based authentication mechanism to secure cloud videoconferencing. Private blockchain, as a decentralized network, can handle user authentication and provide complete data privacy to shared information in a virtual meeting. Moreover, to reduce the latency and mining processing overhead and for scalability of the system, we use a time-based consensus algorithm. Our simulation shows very low latency results, perfect for a video system.
【Keywords】Blockchain Videoconferencing; Security; Privacy; Authentication
【标题】用于安全 VoIP 通信的可扩展轻量级基于区块链的身份验证机制
【摘要】目前，由于新型冠状病毒引起的 2019 年冠状病毒病 (COVID19) 的传播，世界正在经历一场全球大流行。用于遏制病毒快速传播和控制这种病毒污染率的主要措施是保持社交距离。这种方法极大地影响了市民的日常生活。为此，使用云视频会议应用解决方案以虚拟会议代替面对面会议应运而生。这种方法确实为全球数百万的学校、公司、政府和个人解决了这个问题。然而，出现了安全和隐私问题。在大流行期间，视频会议用户的数量有所增加，但一些应用程序只为未付费用户提供未加密的通信。此外，未经邀请的与会者可以加入虚拟会议，收集有关用户和共享文件的敏感信息，并使用 deepfake 工具参与其中。为了解决这个难题，我们在本文中提出了一种轻量级、可扩展的基于区块链的身份验证机制来保护云视频会议。私有区块链作为一个去中心化的网络，可以处理用户身份验证并为虚拟会议中的共享信息提供完整的数据隐私。此外，为了减少延迟和挖掘处理开销以及系统的可扩展性，我们使用基于时间的共识算法。我们的模拟显示了非常低的延迟结果，非常适合视频系统。
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