Internet of Things (IoT) and cloud computing are separate emerging paradigms, which are both an indispensable part of numerous ubiquitous devices that are connected to our life via the Internet. Their enactment and effectiveness are presumed to be more and more pervasive, making them essential ingredients of the Future Internet. Cloud data broadcast system is a novel framework where the advancement of both cloud and IoT is merged and becomes an enabler of a vast number of application scenarios. A data broadcast system with simultaneous individual messaging, aka broadcast encryption with personalized messages (BEPM), outsources not only a common encrypted message to a group of consumers but also encrypted personalized messages to individual consumers of the cloud server. Currently available BEPM are not secure against social engineering attacks, which means information of subscribed consumers is available to enemies. In this article, we present a new cloud data broadcast paradigm, called anonymous cloud data broadcast system with simultaneous individual messaging, in which anonymity of subscribed consumers is a primary concern. Furthermore, we extend our study of anonymization to develop the first traceable cloud data broadcast system with simultaneous individual messaging that concatenates two mutually orthogonal functionalities, namely consumer’s anonymity and traitor consumers traceability, in a unified manner. In particular, security and performance analysis explicates that both the designs are very cost-effective as consumer’s secret-key size is constant that fulfills the goals of achieving low overhead and computational cost for resource-constrained IoT devices.

物联网（IoT）和云计算是独立出现的范例，它们都是通过互联网连接到我们生活中的众多无处不在的设备中不可或缺的一部分。据推测，它们的制定和有效性越来越普遍，使其成为未来互联网的重要组成部分。云数据广播系统是一种新颖的框架，其中云和物联网的发展融为一体，并成为众多应用场景的推动者。具有同步个人消息传递的数据广播系统，又名带有个性化消息的广播加密（BEPM），不仅将通用的加密消息外包给一组使用者，而且还将加密的个性化消息外包给云服务器的各个使用者。当前可用的BEPM不能抵御社会工程攻击，这意味着敌人可以获取订阅的消费者的信息。在本文中，我们提出了一种新的云数据广播范例，称为具有同时个人消息传递的匿名云数据广播系统，其中已订阅消费者的匿名性是一个主要问题。此外，我们扩展了对匿名化的研究，以开发第一个具有可同步的个人消息传递的可跟踪云数据广播系统，该消息传递以统一的方式将两个相互正交的功能（即消费者的匿名性和叛徒消费者的可追溯性）连接在一起。尤其是，