diff --git a/ArchiSteamFarm/CryptoHelper.cs b/ArchiSteamFarm/CryptoHelper.cs
index bea0f6bae..5cdefd08e 100644
--- a/ArchiSteamFarm/CryptoHelper.cs
+++ b/ArchiSteamFarm/CryptoHelper.cs
@@ -34,7 +34,16 @@ namespace ArchiSteamFarm {
 			ProtectedDataForCurrentUser
 		}
 
-		private static readonly byte[] EncryptionKey = Encoding.UTF8.GetBytes("ArchiSteamFarm");
+		private static byte[] EncryptionKey = Encoding.UTF8.GetBytes("ArchiSteamFarm");
+
+		internal static void SetEncryptionKey(string key) {
+			if (string.IsNullOrEmpty(key)) {
+				Logging.LogNullError(nameof(key));
+				return;
+			}
+
+			EncryptionKey = Encoding.UTF8.GetBytes(key);
+		}
 
 		internal static string Encrypt(ECryptoMethod cryptoMethod, string decrypted) {
 			if (string.IsNullOrEmpty(decrypted)) {
@@ -84,9 +93,9 @@ namespace ArchiSteamFarm {
 					key = sha256.ComputeHash(EncryptionKey);
 				}
 
-				byte[] data = Encoding.UTF8.GetBytes(decrypted);
-				byte[] encrypted = SteamKit2.CryptoHelper.SymmetricEncrypt(data, key);
-				return Convert.ToBase64String(encrypted);
+				byte[] encryptedData = Encoding.UTF8.GetBytes(decrypted);
+				encryptedData = SteamKit2.CryptoHelper.SymmetricEncrypt(encryptedData, key);
+				return Convert.ToBase64String(encryptedData);
 			} catch (Exception e) {
 				Logging.LogGenericException(e);
 				return null;
@@ -105,9 +114,9 @@ namespace ArchiSteamFarm {
 					key = sha256.ComputeHash(EncryptionKey);
 				}
 
-				byte[] data = Convert.FromBase64String(encrypted);
-				byte[] decrypted = SteamKit2.CryptoHelper.SymmetricDecrypt(data, key);
-				return Encoding.UTF8.GetString(decrypted);
+				byte[] decryptedData = Convert.FromBase64String(encrypted);
+				decryptedData = SteamKit2.CryptoHelper.SymmetricDecrypt(decryptedData, key);
+				return Encoding.UTF8.GetString(decryptedData);
 			} catch (Exception e) {
 				Logging.LogGenericException(e);
 				return null;
diff --git a/ArchiSteamFarm/Program.cs b/ArchiSteamFarm/Program.cs
index 5010842fe..97458fa32 100644
--- a/ArchiSteamFarm/Program.cs
+++ b/ArchiSteamFarm/Program.cs
@@ -406,13 +406,20 @@ namespace ArchiSteamFarm {
 						break;
 					default:
 						if (arg.StartsWith("--", StringComparison.Ordinal)) {
-							Logging.LogGenericWarning("Unrecognized parameter: " + arg);
-							continue;
+							if (arg.StartsWith("--cryptkey=", StringComparison.Ordinal)) {
+								if (arg.Length > 11) {
+									CryptoHelper.SetEncryptionKey(arg.Substring(11));
+								}
+							} else {
+								Logging.LogGenericWarning("Unrecognized parameter: " + arg);
+							}
+
+							break;
 						}
 
 						if (Mode != EMode.Client) {
 							Logging.LogGenericWarning("Ignoring command because --client wasn't specified: " + arg);
-							continue;
+							break;
 						}
 
 						Logging.LogGenericInfo("Command sent: " + arg);