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Ensuring the security of wireless electromagnetic communication remains a significant challenge, particularly in environments with limited resources where traditional encryption methods can be impractical. This work introduces a structured, lightweight framework that integrates a nanoantenna-based transformation pipeline with signal-level encryption and error correction in order to enhance physical-layer security. The methodology begins with signal normalisation and quantisation, followed by Hamming error correction. This is then followed by bitwise XOR encryption using a pseudorandom key stream and spatial scrambling via the Arnold transform. Signal reconstruction after nanoantenna filtering and lightweight encryption achieved high accuracy, with RMSE of 7.69×10−6 and PSNR of 104.27 dB for a Gaussian input. Voice signals also showed strong resilience under distortion. Although the combination of bitwise encryption and the Arnold transform improves obfuscation, the cryptographic strength is limited. These results support the feasibility of the proposed model in low-resource scenarios. Future improvements will focus on secure key generation and hardware implementation.