怎样生成目标电脑不变的唯一机器码

cpu编号和硬盘编号 在网吧,这两项所有的电脑取出来都是一摸一样的.

网卡MAC地址,这个地址是可以通过注册表修改的,并且重装系统等情况就会改变.

该怎么获取唯一不变的机器码?是否有其他好的方法?

cpu编号和硬盘编号， 这两个怎么可能是一样的， 理论上全球唯一的

就是同时装的机器，cpu编号和硬盘编号就是一样的。

验证这个，编码的确不好弄。

不过简单一些就用这两个也可以。不知道楼主做的东西是什么。

楼主用加密狗不。硬件加密就可以。 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Management;
using System.Security.Cryptography;

 /// <summary>
        /// 读取CPU机器码
        /// </summary>
        /// <returns></returns>
        public static string Get_Cpu_Id()
        {
            string cpuInfo = " ";
            using (ManagementClass cimobject = new ManagementClass("Win32_Processor"))
            {
                ManagementObjectCollection moc = cimobject.GetInstances();

                foreach (ManagementObject mo in moc)
                {
                    cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
                    mo.Dispose();
                }
            }
            return cpuInfo.ToString();
        }
        /// <summary>
        /// 读取硬盘机器码
        /// </summary>
        /// <returns></returns>
        public static string Get_HardDisk_Id()
        {
            string HDid = " ";
            using (ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive"))
            {
                ManagementObjectCollection moc1 = cimobject1.GetInstances();
                foreach (ManagementObject mo in moc1)
                {
                    HDid = (string)mo.Properties["Model"].Value;
                    mo.Dispose();
                }
            }
            return HDid.ToString();
        }
        /// <summary>
        /// 读取网卡机器码
        /// </summary>
        /// <returns></returns>
        public static string Get_NetworkCard_Id()
        {
            string MoAddress = " ";
            using (ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration"))
            {
                ManagementObjectCollection moc2 = mc.GetInstances();
                foreach (ManagementObject mo in moc2)
                {
                    if ((bool)mo["IPEnabled"] == true)
                        MoAddress = mo["MacAddress"].ToString();
                    mo.Dispose();
                }
            }
            return MoAddress.ToString();
        }