Secure File Sharing: Build a POC application that allows users to securely share files with end-to-end encryption using Intel SGX. The application could use SGX to protect the confidentiality and integrity of the files, ensuring that only authorized users can access and modify them.

#include <iostream>

#include "Enclave_u.h"
#include "sgx_urts.h"
#include "sgx_uae_service.h"
#include "sgx_ukey_exchange.h"

/* Global EID shared by multiple threads */
sgx_enclave_id_t global_eid = 0;

/* OCall functions */
void ocall_print(const char *str) {
    /* Proxy/Bridge will check the length and null-terminate
     * the input string to prevent buffer overflow.
     */
    printf("%s", str);
}

/* Application entry */
int SGX_CDECL main(int argc, char *argv[]) {
    (void)(argc);
    (void)(argv);

    /* Initialize the enclave */
    if (initialize_enclave() < 0) {
        printf("Enter a character before exit ...\n");
        getchar();
        return -1;
    }

    /* Utilize edger