Techniques are described herein for efficient tunnel management for secured communication between Network Functions (NFs) across different Public Land Mobile Networks (PLMNs) through Security Edge Protection Proxies (SEPPs). A common secured tunnel is created for all the NFs to interact between visited SEPPs (vSEPP) and home SEPPs (hSEPPs). There is a choice to select different authentication methods between different vSEPP-hSEPP pairs.
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Shekhar, Ravi and Ghosh, Ameo, "CREATING A COMMON SECURED TUNNEL FOR NETWORK FUNCTIONS", Technical Disclosure Commons, (October 16, 2018)