A content delivery network (CDN) is a distributed infrastructure to deliver digital contents to end users with high performance. CDNs are critical to provide and protect the availability of Internet contents. However, adversaries can not only evade the CDN protection but also weaponize CDN resources to mount more sophisticated attacks. In this paper, we provide the first survey on CDN security. We categorize CDN security challenges per CDN infrastructure components, discuss possible countermeasures and their effectiveness, and delineate future research directions. This paper aims to highlight the state of CDN security and identify important research challenges in this area.

中文翻译：

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内容交付网络安全：调查


内容分发网络 (CDN) 是一种分布式基础设施，用于向最终用户提供高性能的数字内容。 CDN 对于提供和保护互联网内容的可用性至关重要。然而，攻击者不仅可以逃避 CDN 保护，还可以利用 CDN 资源来发动更复杂的攻击。在本文中，我们提供了第一份关于 CDN 安全性的调查。我们对每个 CDN 基础设施组件的 CDN 安全挑战进行分类，讨论可能的对策及其有效性，并描绘未来的研究方向。本文旨在强调 CDN 安全状况并确定该领域的重要研究挑战。