Gsma Fs.38

SIP environments are notoriously vulnerable to flooding attacks. Malicious actors can overwhelm Call Session Control Functions (CSCF) with a barrage of spoofed INVITE or REGISTER requests. This depletes the network's processing capacity, dropping legitimate user calls and taking down entire regional voice services. 2. Fraud and Monetary Exploitation

Historically, voice networks relied on specialized legacy protocols like SS7. However, modern mobile and converged architectures—including , Voice over New Radio (VoNR / 5G Voice) , and Rich Communication Services (RCS) —rely entirely on SIP. By mapping real-world threat vectors to specific technical defenses, FS.38 serves as the global blueprint for securing modern IP Multimedia Subsystem (IMS) cores, SIP trunks, and network interconnections. The Evolutionary Shift: Why SIP Security Requires FS.38 gsma fs.38

By aligning security controls with the risk class, FS.38 provides a pragmatic path for manufacturers. A Class A temperature logger does not require the same hardware crypto-accelerator as a Class C connected vehicle. This risk-based stratification ensures that security is proportional to cost—a critical factor in IoT’s price-sensitive markets. By mapping real-world threat vectors to specific technical

The GSMA FS.38 specification offers several benefits to network operators, equipment manufacturers, and the wider industry: 2. Fraud and Monetary Exploitation Historically

The potential applications of FS.38 are vast and diverse: