### Motivation and Contributions  
To the best of our knowledge, the security performance analysis of the hybrid FSO/RF system with MRC scheme has not yet been fully investigated when FSO link eavesdropping is considered, and few studies have been found on the ECC of hybrid FSO/RF parallel transmission systems. Because the hybrid FSO/RF parallel transmission system uses two different communication links for information transmission at the same time, the hybrid system is more vulnerable to malicious eavesdropping than the traditional only RF communication or only FSO communication. At present, research on the communication performance and security performance of the hybrid FSO/RF system is relatively independent, and no analysis has been made on the impact of the ECC on the security performance of the system. A comprehensive and systematic analysis of the communication performance and security performance of the hybrid FSO/RF system is of great significance to theoretical analysis and engineering practice. In this work, from the perspective of the overall performance analysis of the hybrid FSO/RF system, we take an interest in the communication performance and security performance analysis of the hybrid system with atmospheric turbulence and pointing errors. First of all, the probability density function (PDF) and cumulative distribution function (CDF) of the signal-to-noise ratio (SNR) at the receiver of the FSO link with the Malaga distribution, and the PDF and CDF of the SNR at the receiver of the RF link subject to the \(\alpha-\mu\) distribution are given. Then, the PDF and CDF of the SNR at the receiver of the hybrid FSO/RF parallel system based on the MRC scheme are derived. Next, the new expressions of the communication performance parameters such as BER, OP, and ECC of the hybrid system and the only FSO system are derived. Moreover, the new expressions of the security performance parameters such as the SOP and the SPSC of the hybrid system in the case of FSO link eavesdropping and RF link eavesdropping are derived, respectively. Finally, numerical results, which demonstrate the communication performance and security performance of the FSO/RF system with atmospheric turbulence and pointing errors, are presented. Table 1 compares the existing work of the hybrid FSO/RF system with the main research contents of this paper in detail. Our main contributions in this work are pointed out as follows:  
* We first obtain the PDF and CDF of the SNR at the receiver of the hybrid FSO/RF parallel system with the MRC scheme and pointing errors. * Through the analysis of communication performance, the new expressions of communication performance parameters such as the BER, OP, and ECC of the hybrid system and the only FSO system are derived. These expressions are novel compared to the existing works as the hybrid FSO/RF model with Malaga turbulence and \(\alpha-\mu\) fading is not reported in the existing hybrid FSO/RF literature, and the ECC of the hybrid system is also rarely reported. * Through the analysis of the security performance, the new expressions of the security performance parameters of the hybrid system, such as the SOP and SPSC, are derived, respectively, in the case of the FSO link eavesdropping or the RF link eavesdropping. These expressions are novel compared to the existing works as the effect of FSO link eavesdropping is not reported in the existing hybrid FSO/RF with MRC technique literature. * Through the method of system simulation, we not only compare and analyze the communication performance and security performance of the hybrid system by different turbulence intensity and pointing errors, but also compare and analyze the SOP and SPSC of the hybrid system with FSO link eavesdropping and RF link eavesdropping. In addition, the security performance of the system is explained by using the analysis conclusion of the ECC, which has not been seen in previous work.