private string EncryptMYKEYID(string ValidationKey) { DateTime now = DateTime.Now; string strTgl = string.Empty; string cpuID = string.Empty; if (ValidationKey == string.Empty) { try { GetInfo cpuInfo = new GetInfo(); cpuID = cpuInfo.GetCPUId(); } catch { MessageBox.Show("Error Get Encryption Keys", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); return(""); } } strTgl = now.Year.ToString("0000") + now.Month.ToString("00") + now.Day.ToString("00"); System.Text.StringBuilder strEncrypt = new System.Text.StringBuilder(); char myCodeDecrypt; int[] SecretCode = new int[] { 7, 10, 5, 14, 20, 3, 11, 9, 25 }; string strResult = string.Empty; for (int i = 0, idxPjg = strTgl.Length, idxCode = 0, pjgIdxCode = 9; i < idxPjg; i++) { myCodeDecrypt = (char)((int)((char)strTgl[i]) + SecretCode[idxCode++]); if (idxCode >= pjgIdxCode) { idxCode = 0; } strEncrypt.Append(myCodeDecrypt); } for (int i = 0, idxPjg = cpuID.Length, idxCode = 0, pjgIdxCode = 9; i < idxPjg; i++) { myCodeDecrypt = (char)((int)((char)cpuID[i]) + SecretCode[idxCode++]); if (idxCode >= pjgIdxCode) { idxCode = 0; } strEncrypt.Append(myCodeDecrypt); } strResult = strEncrypt.ToString(); return(strResult); }