This paper investigates the physical layer security of active reconfigurable intelligent surface (ARIS)-assisted non-orthogonal multiple access (NOMA) networks in the presence of external and internal eavesdroppers. The authors derive closed-form expressions for secrecy outage probability (SOP) and secrecy throughput under both imperfect and perfect successive interference cancellation (ipSIC and pSIC) scenarios. They analyze the secrecy diversity orders of legitimate users at high signal-to-noise ratios and demonstrate that ARIS-assisted NOMA networks outperform PRIS-NOMA and ARIS/PRIS-assisted orthogonal multiple access (OMA) networks in terms of secrecy performance. The results show that the SOP of ARIS-NOMA networks is higher than that of PRIS-NOMA and OMA networks, and that the secrecy throughput of ARIS-NOMA networks is superior to that of PRIS-NOMA and OMA networks. The study also reveals that the balance between thermal noise and residual interference at ARIS does not necessarily improve the SOP, and that the secrecy throughput of ARIS-NOMA networks is more robust against residual interference than that of PRIS-NOMA networks. The authors propose an ARIS-NOMA secure communication framework with on-off control scheme to manage phase shifts and evaluate the secrecy performance of the network. The results show that the proposed framework achieves better secrecy performance than traditional relay schemes and that the secrecy diversity order of users is affected by residual interference from ipSIC. The study also highlights the importance of considering both external and internal eavesdropping scenarios in the design of secure communication systems. The authors conclude that ARIS-NOMA networks offer significant improvements in secrecy performance compared to PRIS-NOMA and OMA networks, and that the on-off control scheme is an effective method for managing phase shifts in ARIS-assisted communication systems.This paper investigates the physical layer security of active reconfigurable intelligent surface (ARIS)-assisted non-orthogonal multiple access (NOMA) networks in the presence of external and internal eavesdroppers. The authors derive closed-form expressions for secrecy outage probability (SOP) and secrecy throughput under both imperfect and perfect successive interference cancellation (ipSIC and pSIC) scenarios. They analyze the secrecy diversity orders of legitimate users at high signal-to-noise ratios and demonstrate that ARIS-assisted NOMA networks outperform PRIS-NOMA and ARIS/PRIS-assisted orthogonal multiple access (OMA) networks in terms of secrecy performance. The results show that the SOP of ARIS-NOMA networks is higher than that of PRIS-NOMA and OMA networks, and that the secrecy throughput of ARIS-NOMA networks is superior to that of PRIS-NOMA and OMA networks. The study also reveals that the balance between thermal noise and residual interference at ARIS does not necessarily improve the SOP, and that the secrecy throughput of ARIS-NOMA networks is more robust against residual interference than that of PRIS-NOMA networks. The authors propose an ARIS-NOMA secure communication framework with on-off control scheme to manage phase shifts and evaluate the secrecy performance of the network. The results show that the proposed framework achieves better secrecy performance than traditional relay schemes and that the secrecy diversity order of users is affected by residual interference from ipSIC. The study also highlights the importance of considering both external and internal eavesdropping scenarios in the design of secure communication systems. The authors conclude that ARIS-NOMA networks offer significant improvements in secrecy performance compared to PRIS-NOMA and OMA networks, and that the on-off control scheme is an effective method for managing phase shifts in ARIS-assisted communication systems.