The handbook covers the following topics and more:

• What is Mobile Signaling
  An overview of the role that signaling plays in the mobile ecosystem and why this has historically been left out of the cybersecurity conversation.
• The Vulnerability of Signaling Systems
  Mobile signaling, especially the still ubiquitous Signaling System 7 (SS7) protocol, is riddled with vulnerabilities exploited by state-level threat actors in offensive cyber operations worldwide. Today, the exploitation of signaling vulnerabilities involves threats to confidentiality and integrity as well as to availability of data and services across all mobile generations. The comparatively low maturity of recognition, reporting requirements and resourcing addressing signaling undermines cyber resilience and poses a unique threat to national security as victims are uniquely powerless to protect themselves.
• The Need for a High Benchmark
  Basic or so-called baseline security measures are not enough. The key to enhancing signaling security lies in establishing a high, common benchmark for protection. This involves moving beyond static configurations and adopting a proactive, adaptive, and aligned approach to cyber defense.
• Operator Blindspots
  Many operators today lack fit for purpose signaling protection to detect significant incidents. Without mature incident reporting frameworks and the capabilities to support them and make threats visible in the first place, telecoms threat sharing will remain nascent and ultimately ineffective while hostile targeting campaigns and data leakage go undiscovered.