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
