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This application discloses a method, apparatus, and medium for implementing secure socket communication within the operating system kernel, belonging to the field of computer systems and network communication technology. This method registers a new secure socket type at the socket layer of the operating system kernel and associates it with a customized set of operation functions. Applications only need to create sockets of this type and inject cryptographic parameters through standard system calls to establish a connection, thereby obtaining transparent, end-to-end automatic encrypted communication capabilities. During transmission, data is encrypted in kernel mode by calling the native crypto subsystem API through a rewritten send function and an authentication tag is attached. During reception, the rewritten receive function automatically performs decryption and integrity verification. This scheme avoids reliance on large external security libraries, improves security and performance, and decentralizes encryption / decryption, resource management, and other processes to the kernel mode, providing upper-layer applications with easy-to-use, lightweight, high-performance, and highly secure kernel-level transparent secure communication.