The Internet-of-Things (IoT) is an imminent and corporal technology that enables the connectivity of smart physical devices with virtual objects contriving in distinct platforms with the help of the internet. The IoT is under massive experimentation to operate in a distributed manner, making it favourable to be utilized in the healthcare ecosystem. However, un- der the IoT healthcare ecosystem (IoT-HS), the nodes of the IoT networks are unveiled to an aberrant level of security threats. Regulating an adequate volume of sensitive and personal data, IoT-HS undergoes various security challenges for which a distributed mechanism to address such concerns plays a vital role. Although Blockchain, having a distributed ledger, is integral to solving security concerns in IoT-HSs, it undergoes major problems, including massive storage and computational requirements. Also, Holochain, which has low computational and memory requirements, lacks authentication distribution availability. Therefore, this paper proposes a hybrid Holochain and Blockchain-based privacy perseverance and security framework for IoT-HSs that combines the benefits Holochain and Blockchain provide, overcoming the computational, memory, and authentication challenges. This framework is more suited for IoT scenarios where resource needs to be optimally utilized. Comprehensive security and performance analysis is conducted to demonstrate the suitability and effectiveness of the proposed hybrid security approach for IoT-HSs in contrast to the Blockchain-only or Holochain-only based approaches.

翻译：物联网（IoT）是一种新兴的具体化技术，借助互联网实现不同平台上智能物理设备与虚拟对象的互联。该技术正被大规模实验以推行分布式运作模式，使其适用于医疗生态系统。然而，在物联网医疗生态系统（IoT-HS）中，物联网网络节点面临异常级别的安全威胁。由于需处理大量敏感和个人数据，IoT-HS面临诸多安全挑战，而分布式机制对解决这些问题至关重要。尽管具有分布式账本的区块链在解决IoT-HS安全问题上不可或缺，但其存在存储和计算需求庞大的主要问题。同时，计算与内存需求较低的Holochain则缺乏身份验证分发能力。因此，本文提出一种基于Holochain与区块链混合的隐私保护与安全框架，该框架融合两者优势，克服计算、内存和身份验证挑战，更适合需要优化资源利用率的物联网场景。通过全面的安全性与性能分析，证明所提混合安全方法相较于纯区块链或纯Holochain方法在IoT-HS中的适用性与有效性。