add Pilz.Cryptography

Pilz.Cryptography/ICrypter.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Pilz.Cryptography
+{
+    public interface ICrypter
+    {
+        string Encrypt(string plainValue);
+        string Decrypt(string encryptedValue);
+    }
+}