diff --git a/dotnet/IEC61850forCSharp/AcseAuthenticationParameter.cs b/dotnet/IEC61850forCSharp/AcseAuthenticationParameter.cs
index 1e5496b6..a0502fbe 100644
--- a/dotnet/IEC61850forCSharp/AcseAuthenticationParameter.cs
+++ b/dotnet/IEC61850forCSharp/AcseAuthenticationParameter.cs
@@ -61,6 +61,12 @@ namespace IEC61850
         [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
         static extern int AcseAuthenticationParameter_getAuthMechanism(IntPtr self);
 
+        [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+        static extern IntPtr AcseAuthenticationParameter_getPassword(IntPtr self);
+
+        [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+        static extern int AcseAuthenticationParameter_getPasswordLength(IntPtr self);
+
         private IntPtr self = IntPtr.Zero;
 
         public AcseAuthenticationParameter()
@@ -87,6 +93,21 @@ namespace IEC61850
         {
             return (AcseAuthenticationMechanism)AcseAuthenticationParameter_getAuthMechanism(self);
         }
+
+        public string GetPassword()
+        {
+            IntPtr password = AcseAuthenticationParameter_getPassword(self);
+
+            if (password != IntPtr.Zero)
+                return Marshal.PtrToStringAnsi(password);
+            else
+                return null;
+        }
+
+        public int GetPasswordLenght()
+        {
+            return AcseAuthenticationParameter_getPasswordLength(self);
+        }
     }
 
     public class IsoApplicationReference
diff --git a/dotnet/server_example_access_control/Program.cs b/dotnet/server_example_access_control/Program.cs
index ac67dbef..fd4919fc 100644
--- a/dotnet/server_example_access_control/Program.cs
+++ b/dotnet/server_example_access_control/Program.cs
@@ -347,18 +347,41 @@ namespace server_access_control
             
             bool clientAuthenticator (object parameter, AcseAuthenticationParameter authParameter, object securityToken, IsoApplicationReference isoApplicationReference)
             {
+                List<string> passwords = parameter as List<string>;
                 Console.WriteLine("ACSE Authenticator:\n");
 
                 IEC61850.AcseAuthenticationMechanism acseAuthenticationMechanism = authParameter.GetAuthMechanism();
 
                 if (acseAuthenticationMechanism == IEC61850.AcseAuthenticationMechanism.ACSE_AUTH_PASSWORD)
                 {
-
+                    int passwordLenght = authParameter.GetPasswordLenght();
+                    string password = authParameter.GetPassword();
+                    if (passwordLenght == passwords.First().Length)
+                    {
+                        if (password == passwords.First())
+                        {
+                            securityToken = passwords.First();
+                            return true;
+                        }
+                    }
+                    else if (passwordLenght == passwords[1].Length)
+                    {
+                        if (password == passwords[1])
+                        {
+                            securityToken = passwords[1];
+                            return true;
+                        }
+                    }
                 }
+
                 return false;
             }
 
-            iedServer.SetAuthenticator(clientAuthenticator, null);
+            List<string> passwords = new List<string>();
+            passwords.Add("user1@testpw");
+            passwords.Add("user2@testpw");
+
+            iedServer.SetAuthenticator(clientAuthenticator, passwords);
 
             iedServer.Start(102);
 
diff --git a/src/mms/inc/iso_connection_parameters.h b/src/mms/inc/iso_connection_parameters.h
index af5a3db0..32f5b854 100644
--- a/src/mms/inc/iso_connection_parameters.h
+++ b/src/mms/inc/iso_connection_parameters.h
@@ -97,6 +97,12 @@ AcseAuthenticationParameter_getAuthMechanism(AcseAuthenticationParameter self);
 LIB61850_API void
 AcseAuthenticationParameter_setPassword(AcseAuthenticationParameter self, char* password);
 
+LIB61850_API const char*
+AcseAuthenticationParameter_getPassword(AcseAuthenticationParameter self);
+
+LIB61850_API int
+AcseAuthenticationParameter_getPasswordLength(AcseAuthenticationParameter self);
+
 
 /**
  * \brief Callback function to authenticate a client
diff --git a/src/mms/iso_common/iso_connection_parameters.c b/src/mms/iso_common/iso_connection_parameters.c
index 2478db6e..04c8997d 100644
--- a/src/mms/iso_common/iso_connection_parameters.c
+++ b/src/mms/iso_common/iso_connection_parameters.c
@@ -57,6 +57,30 @@ AcseAuthenticationParameter_setPassword(AcseAuthenticationParameter self, char*
     self->value.password.passwordLength = strlen(password);
 }
 
+const char*
+AcseAuthenticationParameter_getPassword(AcseAuthenticationParameter self)
+{
+    if (self == NULL)
+        return NULL;
+
+    if (self->mechanism != ACSE_AUTH_PASSWORD)
+        return NULL;
+
+    return (char*)self->value.password.octetString;
+}
+
+int
+AcseAuthenticationParameter_getPasswordLength(AcseAuthenticationParameter self)
+{
+    if (self == NULL)
+        return 0;
+
+    if (self->mechanism != ACSE_AUTH_PASSWORD)
+        return 0;
+
+    return self->value.password.passwordLength;
+}
+
 void
 AcseAuthenticationParameter_setAuthMechanism(AcseAuthenticationParameter self, AcseAuthenticationMechanism mechanism)
 {