Network transportation channels especially hidden, covert, and secure channels can be built using many encoding schemes such as gray code, turbo code, fountain code, etc. To achieve high security, these encoding schemes are validated numerous times to diagnose and eradicate the limitations. The analysis results showed that these encoding schemes have certain performance issues when applied for mobile communication in fifth-generation (5G). These individual codes suffer from the problem that the inter-leavers are only single dimensional array and do not provide optimal encoding/decoding performance leading to high complexity. Some codes suffer limitations due to non-weighted bit positions and limited throughputs because of the multiple channel transmission and high-effective guard bands between the channels. Considering the limitations of the individual encoders, this paper introduces a hybrid encoding scheme to overcome the performance limitations of the existing models and provide highly secured. This proposed model combines the turbo and fountain codes (TFC) to form the hybrid TFC encoder that assigns weights to bit positions and improve the optimal encoding/decoding performance with higher throughput and less complexity. The experiments are conducted to evaluate the performance and the results showed that the proposed TFC encoding method improves the robustness and security better than the existing covert timing channels. The proposed encoding scheme performed a BER enhancements (about 12%–30%) via baseline encoders, scoring high channel capacity maximizing to (0.75 Mbps), validated via MATLAB-based simulation in the Voice over Long Term Evolution (VoLTE) environment.