TY - JOUR TI - Thinking Out of the Blocks: Holochain for Distributed Security in IoT Healthcare Y1 - 2022/03/30/ SP - 37064 PB - IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC N1 - CC BY - IEEE is not the copyright holder of this material. Please follow the instructions via https://creativecommons.org/licenses/by/4.0/ to obtain full-text articles and stipulations in the API documentation. KW - Holochain KW - blockchain KW - security KW - IoT KW - healthcare technology ID - discovery10147534 A1 - Zaman, Shakila A1 - Khandaker, Muhammad RA A1 - Khan, Risala T A1 - Tariq, Faisal A1 - Wong, Kai-Kit UR - https://doi.org/10.1109/ACCESS.2022.3163580 VL - 10 JF - IEEE Access AV - public N2 - The Internet-of-Things (IoT) is an emerging technology that connects and integrates a massive number of smart physical devices with virtual objects operating in diverse platforms through the internet. Due to massive size and physical spread of many applications such as smart healthcare, IoT is increasingly implemented in distributed setting. This distributed nature of implementation of the entities connected to the IoT networks are exposed to an unprecedented level of privacy and security threats. This is particularly severe for IoT healthcare system as it involves huge volume of sensitive and personal data. Although blockchain has posed to be the solution in this scenario thanks to its inherent distributed ledger technology (DLT), it suffers from a major drawback of rapidly increasing storage and computation requirements with the increase in network size which makes its implementation impractical. This paper proposes a holochain-based security and privacy-preserving framework for IoT healthcare systems that overcomes the scalability challenge and is particularly suited for resource constrained IoT scenarios. Through thorough analysis and performance results, we have demonstrated that the holochain based IoT healthcare solution outperforms blockchain based solution in terms of resource requirements while ensuring appropriate level of privacy and security. EP - 37081 ER -