diff --git a/phpseclib/Crypt/Common/SymmetricKey.php b/phpseclib/Crypt/Common/SymmetricKey.php
index 532a1b3e..6069e979 100644
--- a/phpseclib/Crypt/Common/SymmetricKey.php
+++ b/phpseclib/Crypt/Common/SymmetricKey.php
@@ -382,7 +382,7 @@ abstract class SymmetricKey
      * @var string
      * @access private
      */
-    protected $password_default_salt = 'phpseclib/salt';
+    private $password_default_salt = 'phpseclib/salt';
 
     /**
      * The name of the performance-optimized callback function
@@ -1898,7 +1898,7 @@ abstract class SymmetricKey
      * @access private
      * @internal Could, but not must, extend by the child Crypt_* class
      */
-    protected function setupMcrypt()
+    private function setupMcrypt()
     {
         $this->clearBuffers();
         $this->enchanged = $this->dechanged = true;
diff --git a/phpseclib/Crypt/RC2.php b/phpseclib/Crypt/RC2.php
index 9f6a266b..8854be51 100644
--- a/phpseclib/Crypt/RC2.php
+++ b/phpseclib/Crypt/RC2.php
@@ -534,21 +534,6 @@ class RC2 extends BlockCipher
         return pack('vvvv', $r0, $r1, $r2, $r3);
     }
 
-    /**
-     * Setup the \phpseclib\Crypt\Common\SymmetricKey::ENGINE_MCRYPT $engine
-     *
-     * @see \phpseclib\Crypt\Common\SymmetricKey::setupMcrypt()
-     * @access private
-     */
-    protected function setupMcrypt()
-    {
-        if (!isset($this->key)) {
-            $this->setKey('');
-        }
-
-        parent::setupMcrypt();
-    }
-
     /**
      * Creates the key schedule
      *
diff --git a/phpseclib/Crypt/Rijndael.php b/phpseclib/Crypt/Rijndael.php
index 5ffa3bc3..6159da9a 100644
--- a/phpseclib/Crypt/Rijndael.php
+++ b/phpseclib/Crypt/Rijndael.php
@@ -81,16 +81,6 @@ class Rijndael extends BlockCipher
      */
     protected $cipher_name_mcrypt = 'rijndael-128';
 
-    /**
-     * The default salt used by setPassword()
-     *
-     * @see \phpseclib\Crypt\Common\SymmetricKey::password_default_salt
-     * @see \phpseclib\Crypt\Common\SymmetricKey::setPassword()
-     * @var string
-     * @access private
-     */
-    protected $password_default_salt = 'phpseclib';
-
     /**
      * The Key Schedule
      *
diff --git a/phpseclib/Crypt/TripleDES.php b/phpseclib/Crypt/TripleDES.php
index 0a73c41c..b597d29d 100644
--- a/phpseclib/Crypt/TripleDES.php
+++ b/phpseclib/Crypt/TripleDES.php
@@ -68,16 +68,6 @@ class TripleDES extends DES
      */
     protected $key_length = 24;
 
-    /**
-     * The default salt used by setPassword()
-     *
-     * @see \phpseclib\Crypt\Common\SymmetricKey::password_default_salt
-     * @see \phpseclib\Crypt\Common\SymmetricKey::setPassword()
-     * @var string
-     * @access private
-     */
-    protected $password_default_salt = 'phpseclib';
-
     /**
      * The mcrypt specific name of the cipher
      *