An Efficient Dynamic Key Management Scheme for IoT Devices in Aging in Place Systems

According to the 2022 report of the World Health Organization, 22% of the world population will be aged above 60 by the year 2050. To tackle this issue, Aging in Place (AiP) systems, which are a group of technology solutions to fulfill the expectations of older adults by limiting the direct involvement of external individuals without compromising the promised lifestyle, have received considerable attention in recent years. Though AiP systems are promising, they are still facing many challenges, including security challenge. In this paper, to secure the group communications of IoT devices in AiP systems, we propose an efficient dynamic key management scheme, which is characterized by employing binary heap tree, bloom filter, and polynomial based access control techniques. Security analysis shows that our proposed scheme can achieve desirable security requirements, i.e., forward security, backward security, and key independence. In addition, detailed performance evaluation also indicates our proposed scheme is efficient in comparison with previously reported schemes.