The increasing incorporation of wireless sensor networks into the Internet of Things (IoT) has revealed substantial security obstacles. This research paper examines the crucial field of IoT security and introduces a novel cryptographic solution to improve the reliability of wireless sensor networks. The proposed hybrid method of ELGamal + AES (EL-AES) as an innovative approach that synergistically combines the advantages of ELGamal and AES encryption techniques to protect IoT data. The presented study aims to assess the effectiveness of E-AES in enhancing security by comparing it to two commonly used cryptographic techniques Elliptic Curve Cryptography (ECC) and Advanced Encryption Standard (AES). This paper thoroughly examines the capabilities of these cryptographic approaches by conducting a comprehensive assessment using six key evaluation parameters: Throughput, Latency, Resource Utilization, Response Time, Efficiency, and Load Handling.  The findings of the work indicate that the EL-AES method surpasses both ECC and AES in all evaluation parameters, highlighting its superior capability in ensuring IoT security. The EL-AES algorithm provides both enhanced security and impressive efficiency, making it a highly promising cryptographic solution for IoT applications that require strong data protection while operating under limited resources. This study adds to the current discussion on IoT security and establishes the EL-AES method as a reliable cryptographic solution for safeguarding wireless sensor networks in the growing IoT environment.