The adoption of Network-on-Chip (NoC) as the backbone for Multiprocessor System-on-Chip (MPSoC) communications is becoming increasingly common due to its scalability. Nevertheless, the vulnerability of these systems to security exploits, particularly from third-party components that may be embedded with Hardware Trojans (HTs), poses a significant threat. These Hardware Trojanss (HTss) can facilitate unauthorized eavesdropping and data extraction, compromising sensitive information. Our work introduces Embedded Security Accelerator (ESA) that encrypt and authenticate outgoing traffic from Processing Elements (PEs) to network routers of the Networks-on-Chip (NoCs), using the lightweight crypto algorithm PRINCE enhancing data integrity and confidentiality against network-based attacks. This approach ensures secure data transmission and minimizes the risks associated with Hardware Trojans (HTs) with manageable costs regarding FPGA resources and acceptable power increase.