C# 등록 코드의 인스턴스 코드 생성

 
  
string t = DateTime.Now.Ticks.ToString(); 
  
 
  
            t = DESKey.DESEncrypt(t, DESKey.DesKeyStr); 
  
            string[] strid = new string[t.Length];// 
  
            for (int i = 0; i < t.Length; i++)//        
  
            { 
  
                strid[i] = t.Substring(i, 1); 
  
            } 
  
            string s = ""; 
  
            Random rdid = new Random(); 
  
            for (int i = 0; i < 9; i++)//                     
  
            { 
  
                s += strid[rdid.Next(0, strid.Length)]; 
  
            } 
  
 
 

 
  
class DESKey 
  
    { 
  
        public const string DesKeyStr = "BLUE2013"; 
   
  
        #region DES  
        /// 

        /// DES  
        /// 

        ///         
        ///        
        public static string DESEncrypt(string pToEncrypt, string DesKeyStr)
        {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
                des.Key = ASCIIEncoding.ASCII.GetBytes(DesKeyStr);
                des.IV = ASCIIEncoding.ASCII.GetBytes(DesKeyStr);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                StringBuilder ret = new StringBuilder();
                foreach (byte b in ms.ToArray())
                {
                    ret.AppendFormat("{0:X2}", b);
                }
                ret.ToString();
                return ret.ToString();
            }
            catch
            {

                return "";
            }
 
  

        }
        #endregion
 
  
        #region DES  
        /// 

        /// DES  
        /// 

        ///        
        ///        
        public static string DESDecrypt(string pToDecrypt, string DesKeyStr)
        {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
 
  
                byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
                for (int x = 0; x < pToDecrypt.Length / 2; x++)
                {
                    int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                    inputByteArray[x] = (byte)i;
                }
 
  
                des.Key = ASCIIEncoding.ASCII.GetBytes(DesKeyStr);
                des.IV = ASCIIEncoding.ASCII.GetBytes(DesKeyStr);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
 
  
                StringBuilder ret = new StringBuilder();
 
  
                return System.Text.Encoding.Default.GetString(ms.ToArray());
            }
            catch
            {

                return "";
            }
        }
        #endregion
 
  
 
 
  
    }