There are several Contact Tracing solutions since the outbreak of SARS COVID-19. All these solutions are localized—specific to a country. The Apps supported by these solutions do not interwork with each other. There are no standards to the proximity data collected by these Apps. Once the international travel restrictions are relaxed, this will become an issue. This paper explores this issue, by addressing one of the key requirements of Contact Tracing solutions. All the current solutions use an Identifier, Proximity Identifier (PID), that anonymously represents the user in the proximity data exchanged. The PID used in these applications varies in their structure, management and properties. This paper first identifies the common desirable properties of PID, including some non-obvious ones for its global application. This identification is essential for the design and development of the Contact Tracing solution that can work across boundaries seamlessly. The paper also evaluates representative solutions from two different design classes against these properties.

中文翻译：

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全球社区接触者追踪解决方案

自 SARS COVID-19 爆发以来，有多种接触者追踪解决方案。所有这些解决方案都是本地化的——特定于一个国家。这些解决方案支持的应用程序之间不互通。这些应用程序收集的接近数据没有标准。一旦放宽国际旅行限制，这将成为一个问题。本文通过解决接触者追踪解决方案的关键要求之一来探讨这个问题。所有当前的解决方案都使用一个标识符，接近标识符 (PID)，它匿名地代表用户在所交换的接近数据中。这些应用程序中使用的 PID 在其结构、管理和属性方面各不相同。本文首先确定了 PID 的共同理想特性，包括一些对于其全球应用来说不明显的特性。这种识别对于设计和开发可以跨边界无缝工作的接触者追踪解决方案至关重要。本文还针对这些属性评估了来自两个不同设计类别的代表性解决方案。