Multi-Agent Systems can support e-Healthcare applications for improving quality of life of citizens. In this direction, we propose a healthcare system architecture named smart healthcare city. First, we divide a given city into various zones and then we propose a zonal level three-layered system architecture. Further, for effectiveness we introduce a Multi-Agent System (MAS) in this three-layered architecture. Protecting sensitive health information of citizens is a major security concern. Group key agreement (GKA) is the corner stone for securely sharing the healthcare data among the healthcare stakeholders of the city. For establishing GKA, many efficient cryptosystems are available in the classical field. However, they are yet dependent on the supposition that some computational problems are infeasible. In light of quantum mechanics, a new field emerges to share a secret key among two or more members. The unbreakable and highly secure features of key agreement based on fundamental laws of physics allow us to propose a Quantum GKA (QGKA) technique based on renowned Quantum Diffie–Hellman (QDH). In this, a node acts as a Group Controller (GC) and forms 2-party groups with remaining nodes, establishing a QDH-style shared key per each two-party. It then joins these keys into a single group key by means of a XOR-operation, acting as a usual group node. Furthermore, we extend the QGKA to Dynamic QGKA (DQGKA) by adding join and leave protocol. Our protocol performance was compared with existing QGKA protocols in terms of Qubit efficiency (QE), unitary operation (UO), unitary operation efficiency (UOE), key consistency check (KCC), security against participants attack (SAP) and satisfactory results were obtained. The security analysis of the proposed technique is based on unconditional security of QDH. Moreover, it is secured against internal and external attack. In this way, e-healthcare Multi-Agent System can be robust against future quantum-based attacks.

中文翻译：

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Quantum Diffie-Hellman扩展了针对智能城市中电子医疗多代理系统的Dynamic Quantum Group关键协议。

Multi-Agent系统可以支持电子医疗保健应用程序，以改善公民的生活质量。在这个方向上，我们提出了一个名为智能医疗城市的医疗系统架构。首先，我们将给定的城市划分为不同的区域，然后提出区域级的三层系统架构。此外，为了提高效率，我们在此三层体系结构中引入了多代理系统（MAS）。保护公民的敏感健康信息是主要的安全问题。组密钥协议（GKA）是在城市的医疗保健利益相关方之间安全共享医疗保健数据的基石。为了建立GKA，在传统领域中可以使用许多有效的密码系统。但是，它们仍然依赖于某些计算问题不可行的假设。根据量子力学，一个新的领域应运而生，可以在两个或更多成员之间共享密钥。基于物理基本定律的关键协议的牢不可破且高度安全的特性使我们能够基于著名的量子Diffie-Hellman（QDH）提出一种量子GKA（QGKA）技术。在这种情况下，节点充当组控制器（GC），并与其余节点组成2方组，从而为每个两方建立QDH风格的共享密钥。然后，它通过XOR操作将这些密钥合并为单个组密钥，用作通常的组节点。此外，我们通过添加加入和离开协议将QGKA扩展为动态QGKA（DQGKA）。我们在Qubit效率（QE），统一操作（UO），统一操作效率（UOE），密钥一致性检查（KCC），获得了针对参与者攻击的安全性（SAP），并获得了令人满意的结果。该技术的安全性分析基于QDH的无条件安全性。而且，它可以抵御内部和外部攻击。这样，电子医疗保健多代理系统可以抵抗未来基于量子的攻击。