diff --git a/src/authm_mad/one_auth_mad.rb b/src/authm_mad/one_auth_mad.rb
index 8920e11c6e..2df3f394ef 100755
--- a/src/authm_mad/one_auth_mad.rb
+++ b/src/authm_mad/one_auth_mad.rb
@@ -32,6 +32,8 @@ require 'scripts_common'
 require 'OpenNebulaDriver'
 require 'getoptlong'
 require 'shellwords'
+require 'rexml/document'
+require 'opennebula'
 
 # This is a generic AuthZ/AuthN driver able to manage multiple authentication
 # protocols (simultaneosly). It also supports the definition of custom
@@ -90,15 +92,6 @@ class AuthDriver < OpenNebulaDriver
         end
     end
 
-    # Works the same as log_method but changes the password by '****'.
-    # The last word is the password for authentication.
-    def log_method_no_password(num, secret)
-        lambda {|message, all=true|
-            m=message.gsub(/ #{Regexp.escape(secret)}$/, ' ****')
-            log(num, m, all)
-        }
-    end
-
     # Authenticate a user based in a string of the form user:secret when using the
     # driver secret is protocol:token
     # @param [String] the id for this request, used by OpenNebula core
@@ -125,12 +118,17 @@ class AuthDriver < OpenNebulaDriver
         authN_path = File.join(@local_scripts_path, driver)
 
         command = File.join(authN_path, ACTION[:authN].downcase)
-        command << ' ' << ([user, password, secret].map do |p|
-            Shellwords.escape(p)
-        end.join(' '))
+
+        stdin_xml = OpenNebula::XMLElement.new
+        stdin_xml.initialize_xml('<AUTHN/>', 'AUTHN')
+        stdin_xml.add_element('/AUTHN',
+            'USERNAME'  => user,
+            'PASSWORD'  => password,
+            'SECRET'    => secret)
 
         rc = LocalCommand.run(command,
-            log_method_no_password(request_id, Shellwords.escape(secret)))
+            log_method(request_id),
+            stdin_xml.to_xml)
 
         result, info = get_info_from_execution(rc)
 
@@ -162,9 +160,21 @@ class AuthDriver < OpenNebulaDriver
             send_message(ACTION[:authZ], result, request_id, "-")
         else
             command = @authZ_cmd.clone
-            command << ' ' << user_id << ' ' << requests.join(' ')
 
-            rc = LocalCommand.run(command, log_method(request_id))
+            stdin_xml = OpenNebula::XMLElement.new
+            stdin_xml.initialize_xml('<AUTHZ/>', 'AUTHZ')
+            stdin_xml.add_element('/AUTHZ',
+                'USERNAME'  => user_id,
+                'REQUESTS'  => nil)
+
+            requests.each do |request|
+                stdin_xml.add_element('/AUTHZ/REQUESTS',
+                    'REQUEST' => request)
+            end
+
+            rc = LocalCommand.run(command,
+                log_method(request_id),
+                stdin_xml.to_xml)
 
             result , info = get_info_from_execution(rc)
 
diff --git a/src/authm_mad/remotes/dummy/authenticate b/src/authm_mad/remotes/dummy/authenticate
index ac6355d99e..f517b1a288 100755
--- a/src/authm_mad/remotes/dummy/authenticate
+++ b/src/authm_mad/remotes/dummy/authenticate
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env ruby
 
 # -------------------------------------------------------------------------- #
 # Copyright 2002-2018, OpenNebula Project, OpenNebula Systems                #
@@ -16,11 +16,32 @@
 # limitations under the License.                                             #
 #--------------------------------------------------------------------------- #
 
-# $1 = username
-# $2 = "-" if user is not registered in opennebula
-# $3 = password
-echo core $1 $3
+ONE_LOCATION=ENV["ONE_LOCATION"]
 
+if !ONE_LOCATION
+    RUBY_LIB_LOCATION="/usr/lib/one/ruby"
+    ETC_LOCATION="/etc/one/"
+else
+    RUBY_LIB_LOCATION=ONE_LOCATION+"/lib/ruby"
+    ETC_LOCATION=ONE_LOCATION+"/etc/"
+end
 
+$: << RUBY_LIB_LOCATION
 
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = xml['/AUTHN/USERNAME']
+    pass   = xml['/AUTHN/PASSWORD']
+    secret = xml['/AUTHN/SECRET']
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
+
+puts "core #{user} #{secret}"
diff --git a/src/authm_mad/remotes/ldap/authenticate b/src/authm_mad/remotes/ldap/authenticate
index ed9528ad30..099f92ddb3 100755
--- a/src/authm_mad/remotes/ldap/authenticate
+++ b/src/authm_mad/remotes/ldap/authenticate
@@ -31,6 +31,9 @@ $: << RUBY_LIB_LOCATION
 require 'yaml'
 require 'opennebula/ldap_auth'
 require 'uri'
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
 if defined?(URI::Parser)
     URI_PARSER=URI::Parser.new
@@ -38,9 +41,17 @@ else
     URI_PARSER=URI
 end
 
-user=URI_PARSER.unescape(ARGV[0])
-pass=URI_PARSER.unescape(ARGV[1])
-secret=URI_PARSER.unescape(ARGV[2])
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = URI_PARSER.unescape(xml['/AUTHN/USERNAME'])
+    pass   = URI_PARSER.unescape(xml['/AUTHN/PASSWORD'])
+    secret = URI_PARSER.unescape(xml['/AUTHN/SECRET'])
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
 
 options=YAML.load(File.read(ETC_LOCATION+'/auth/ldap_auth.conf'))
 
diff --git a/src/authm_mad/remotes/plain/authenticate b/src/authm_mad/remotes/plain/authenticate
index bd1fce9340..8d3d4d9012 100755
--- a/src/authm_mad/remotes/plain/authenticate
+++ b/src/authm_mad/remotes/plain/authenticate
@@ -29,10 +29,21 @@ end
 $: << RUBY_LIB_LOCATION
 
 require 'scripts_common'
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
-user   = ARGV[0]
-pass   = ARGV[1]
-secret = ARGV[2]
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = xml['/AUTHN/USERNAME']
+    pass   = xml['/AUTHN/PASSWORD']
+    secret = xml['/AUTHN/SECRET']
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
 
 #OpenNebula.log_debug("Authenticating #{user}, with password #{pass} (#{secret})")
 
diff --git a/src/authm_mad/remotes/server_cipher/authenticate b/src/authm_mad/remotes/server_cipher/authenticate
index 941a59a79d..c06dd66bf2 100755
--- a/src/authm_mad/remotes/server_cipher/authenticate
+++ b/src/authm_mad/remotes/server_cipher/authenticate
@@ -30,10 +30,21 @@ $: << RUBY_LIB_LOCATION
 
 require 'opennebula/server_cipher_auth'
 require 'scripts_common'
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
-user   = ARGV[0] # username as registered in OpenNebula
-pass   = ARGV[1] # password for this user
-secret = ARGV[2] # Base64 encoded secret as obtained from login_token
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = xml['/AUTHN/USERNAME'] # username as registered in OpenNebula
+    pass   = xml['/AUTHN/PASSWORD'] # password for this user
+    secret = xml['/AUTHN/SECRET']   # Base64 encoded secret as obtained from login_token
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
 
 #OpenNebula.log_debug("Authenticating #{user}, with password #{pass} (#{secret})")
 
diff --git a/src/authm_mad/remotes/server_x509/authenticate b/src/authm_mad/remotes/server_x509/authenticate
index 5a6a33b690..e731a9f7c2 100755
--- a/src/authm_mad/remotes/server_x509/authenticate
+++ b/src/authm_mad/remotes/server_x509/authenticate
@@ -30,10 +30,21 @@ $: << RUBY_LIB_LOCATION
 
 require 'opennebula/server_x509_auth'
 require 'scripts_common'
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
-user   = ARGV[0] # username as registered in OpenNebula
-pass   = ARGV[1] # password for this user
-secret = ARGV[2] # Base64 encoded secret as obtained from login_token
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = xml['/AUTHN/USERNAME'] # username as registered in OpenNebula
+    pass   = xml['/AUTHN/PASSWORD'] # password for this user
+    secret = xml['/AUTHN/SECRET']   # Base64 encoded secret as obtained from login_token
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
 
 #OpenNebula.log_debug("Authenticating #{user}, with password #{pass} (#{secret})")
 
diff --git a/src/authm_mad/remotes/ssh/authenticate b/src/authm_mad/remotes/ssh/authenticate
index 5c4548c4df..d80013fb6c 100755
--- a/src/authm_mad/remotes/ssh/authenticate
+++ b/src/authm_mad/remotes/ssh/authenticate
@@ -30,10 +30,21 @@ $: << RUBY_LIB_LOCATION
 
 require 'opennebula/ssh_auth'
 require 'scripts_common'
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
-user   = ARGV[0]
-pass   = ARGV[1]
-secret = ARGV[2]
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = xml['/AUTHN/USERNAME']
+    pass   = xml['/AUTHN/PASSWORD']
+    secret = xml['/AUTHN/SECRET']
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
 
 #OpenNebula.log_debug("Authenticating #{user}, with password #{pass} (#{secret})")
 begin
diff --git a/src/authm_mad/remotes/x509/authenticate b/src/authm_mad/remotes/x509/authenticate
index 584252399a..5fffe376a1 100755
--- a/src/authm_mad/remotes/x509/authenticate
+++ b/src/authm_mad/remotes/x509/authenticate
@@ -30,10 +30,21 @@ $: << RUBY_LIB_LOCATION
 
 require 'opennebula/x509_auth'
 require 'scripts_common'
+require 'rexml/document'
+require 'opennebula/error'
+require 'opennebula/xml_utils'
 
-user   = ARGV[0] # username as registered in OpenNebula
-pass   = ARGV[1] # DN registered for this user
-secret = ARGV[2] # Base64 encoded text and certificate chain text:cert_0:cert_1:..., certs in pem format
+begin
+    xml = OpenNebula::XMLElement.new
+    xml.initialize_xml(STDIN.read, 'AUTHN')
+
+    user   = xml['/AUTHN/USERNAME'] # username as registered in OpenNebula
+    pass   = xml['/AUTHN/PASSWORD'] # DN registered for this user
+    secret = xml['/AUTHN/SECRET']   # Base64 encoded text and certificate chain text:cert_0:cert_1:..., certs in pem format
+rescue
+    STDERR.puts "Invalid XML input"
+    exit(-1)
+end
 
 #OpenNebula.log_debug("Authenticating #{user}, with password #{pass} (#{secret})")