在客户端认证的过程中，我们总要获取客户机的唯一识别信息，曾经以为MAC地址是不会变的，但是现在各种改，特别是使用无线上网卡，MAC地址插一次变一次，所以这样使用MAC就没有什么意义了，怎么办，又开始求助Google，最后找到一个折中的方案
原理通过获取主板、处理器、BIOS、mac、显卡、硬盘等的ID生成唯一识别码
建议1、使用那些不经常更换的模块来生成识别码。
2、如果经常更换MAC，显卡，硬盘，则不要使用这些ID。
3、确保使用static变量在整个应用来保存唯一识别码。
实现注意引用System.Management
using System; using System.Management; using System.Security.Cryptography; using System.Security; using System.Collections; using System.Text; namespace Security { /// <summary> /// Generates a 16 byte Unique Identification code of a computer /// Example: 4876-8DB5-EE85-69D3-FE52-8CF7-395D-2EA9 /// </summary> public class FingerPrint { private static string fingerPrint = string.Empty; public static string Value() { if (string.IsNullOrEmpty(fingerPrint)) { fingerPrint = GetHash("CPU >> " + cpuId() + "\nBIOS >> " + biosId() + "\nBASE >> " + baseId() //+"\nDISK >> "+ diskId() + "\nVIDEO >> " + videoId() +"\nMAC >> "+ macId() ); } return fingerPrint; } private static string GetHash(string s) { MD5 sec = new MD5CryptoServiceProvider(); ASCIIEncoding enc = new ASCIIEncoding(); byte[] bt = enc.GetBytes(s); return GetHexString(sec.ComputeHash(bt)); } private static string GetHexString(byte[] bt) { string s = string.Empty; for (int i = 0; i < bt.Length; i++) { byte b = bt[i]; int n, n1, n2; n = (int)b; n1 = n & 15; n2 = (n >> 4) & 15; if (n2 > 9) s += ((char)(n2 - 10 + (int)\'A\')).ToString(); else s += n2.ToString(); if (n1 > 9) s += ((char)(n1 - 10 + (int)\'A\')).ToString(); else s += n1.ToString(); if ((i + 1) != bt.Length && (i + 1) % 2 == 0) s += "-"; } return s; } #region Original Device ID Getting Code //Return a hardware identifier private static string identifier (string wmiClass, string wmiProperty, string wmiMustBeTrue) { string result = ""; System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass); System.Management.ManagementObjectCollection moc = mc.GetInstances(); foreach (System.Management.ManagementObject mo in moc) { if (mo[wmiMustBeTrue].ToString() == "True") { //Only get the first one if (result == "") { try { result = mo[wmiProperty].ToString(); break; } catch { } } } } return result; } //Return a hardware identifier private static string identifier(string wmiClass, string wmiProperty) { string result = ""; System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass); System.Management.ManagementObjectCollection moc = mc.GetInstances(); foreach (System.Management.ManagementObject mo in moc) { //Only get the first one if (result == "") { try { result = mo[wmiProperty].ToString(); break; } catch { } } } return result; } private static string cpuId() { //Uses first CPU identifier available in order of preference //Don\'t get all identifiers, as it is very time consuming string retVal = identifier("Win32_Processor", "UniqueId"); if (retVal == "") //If no UniqueID, use ProcessorID { retVal = identifier("Win32_Processor", "ProcessorId"); if (retVal == "") //If no ProcessorId, use Name { retVal = identifier("Win32_Processor", "Name"); if (retVal == "") //If no Name, use Manufacturer { retVal = identifier("Win32_Processor", "Manufacturer"); } //Add clock speed for extra security retVal += identifier("Win32_Processor", "MaxClockSpeed"); } } return retVal; } //BIOS Identifier private static string biosId() { return identifier("Win32_BIOS", "Manufacturer") + identifier("Win32_BIOS", "SMBIOSBIOSVersion") + identifier("Win32_BIOS", "IdentificationCode") + identifier("Win32_BIOS", "SerialNumber") + identifier("Win32_BIOS", "ReleaseDate") + identifier("Win32_BIOS", "Version"); } //Main physical hard drive ID private static string diskId() { return identifier("Win32_DiskDrive", "Model") + identifier("Win32_DiskDrive", "Manufacturer") + identifier("Win32_DiskDrive", "Signature") + identifier("Win32_DiskDrive", "TotalHeads"); } //Motherboard ID private static string baseId() { return identifier("Win32_BaseBoard", "Model") + identifier("Win32_BaseBoard", "Manufacturer") + identifier("Win32_BaseBoard", "Name") + identifier("Win32_BaseBoard", "SerialNumber"); } //Primary video controller ID private static string videoId() { return identifier("Win32_VideoController", "DriverVersion") + identifier("Win32_VideoController", "Name"); } //First enabled network card ID private static string macId() { return identifier("Win32_NetworkAdapterConfiguration", "MACAddress", "IPEnabled"); } #endregion } }