What is S-TMSI

The mobile service was globally popularized with the ease of internet access enabled with the 3rd generation of networks and the broadband wireless speeds enabled with the 4th generation known as the long-term evolution (LTE). LTE became the most popular architecture with around 600 commercially launched networks worldwide. This prompted further advancements for hundreds of gigabits per second speeds and connect tens of billions of devices worldwide. The LTE-advanced and LTE-advanced-pro were introduced as intermediary network enhancements towards the future 5th network generation. For the first time, the 3rd generation partnership project (3GPP) architectures included built-in features for conducting mobile network forensics so investigators can structure and coordinate the investigation with maximum safeguards for the quality of the evidence, users' privacy, and network performance. To fully capitalize on the forensics features, this chapter details all the infrastructural, security, and forensics-related aspects of the modern 3GPP networks.