Basic encryption on Silverstripe

Info

*****************
*The Data Object*
*****************
<?php

class TheData extends DataObject  {
 
  public static $db = array(
    'Name' => 'Varchar',
    'SecretData' => 'Varchar'
  );
  public static $has_many = array(
   
  );
  public static $searchable_fields = array(
	   'Name'
  );
  public static $summary_fields = array(
    'Name' => 'Name',
    
  );
  public static $default_sort = "ID";

  function getCMSFields() { 
    $fields = parent::getCMSFields();
    return $fields; 
  }
 
  public function decryptedInfo($toDecrypt) {
    $key = '10$b1cf626001';
    return rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($toDecrypt), MCRYPT_MODE_CBC, md5(md5($key))), "\0");
  }

  public function encryptInfo($password) {
      $key = '10$b1cf626001';
      return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $password, MCRYPT_MODE_CBC, md5(md5($key))));
  }
  function ELink($action = 'editsecret'){
    $cp = DataObject::get_one('TheDataPage');
    if(!$action) $action = 'editsecret';
    return Controller::join_links($cp->Link(), "$action/" . $this->ID);
  }

}


*********************
*The controller page*
*********************
<?php

class TheDataPage extends Page {
   private static $db = array(
   );
   private static $has_one = array(
   );
 
}

class TheDataPage_Controller extends Page_Controller {

	public static $allowed_actions = array(
		'AddData', 'doAddData', 'encryptInfo', ' decryptedInfo', 'EditData', 'doEditData', 'editsecret'
	);
	public function init() {
		parent::init();
		
	}
	function getsecrets() {
		return TheData::get();
	}
	public function decryptedInfo($toDecrypt) {
    	$key = '10$b1cf626001';
    	return rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($toDecrypt), MCRYPT_MODE_CBC, md5(md5($key))), "\0");
  	}
  	public function encryptInfo($password) {
      	$key = '10$b1cf626001';
      	return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $password, MCRYPT_MODE_CBC, md5(md5($key))));
  	}
  	function editsecret() {
		return $this->renderWith(array('TheDataPage','Page'));
	}
	public function AddData() {
		$form = Form::create(
	    	$this,
	    	"AddData",
		    FieldList::create(
		      		LiteralField::create("LiteralField","<legend>Add Data</legend>" ),
			    	LiteralField::create("LiteralField","<div class='row'>" ),
						LiteralField::create("LiteralField","<div class='large-12 medium-12 columns'>" ),
							TextField::create('SecretData', 'Add Secret Data'),
						LiteralField::create("LiteralField","</div>" ),
					LiteralField::create("LiteralField","</div>" ) //end
			),
	    	FieldList::create(
	    		FormAction::create("doAddData")->setTitle("Add Data")->addExtraClass('button tiny right')
	    	)
		);
		return $form;
	}
	function doAddData($data, $form){
		$submission  = new TheData();
		$form->saveInto($submission );
		$submission->Name = $submission->SecretData;
		$submission->SecretData = self::encryptInfo($submission->SecretData);
		$submission ->write();
		Controller::curr()->redirectback(); 
	}
	public function EditData() {
		$thesecret = '';
		$Params = $this->getURLParams();
		if(is_numeric($Params['ID']) && $secrets = TheData::get()->filter(array(
			'ID' => $Params['ID']
		))->First())
		if($secrets){
			$thesecret = self::decryptedInfo($secrets->SecretData);
		}
		$form = Form::create(
	    	$this,
	    	"EditData",
		    FieldList::create(
	      		LiteralField::create("LiteralField","<legend>Edit Data</legend>" ),
		    	LiteralField::create("LiteralField","<div class='row'>" ),
		    		HiddenField::create('ID', 'aID'),
					LiteralField::create("LiteralField","<div class='large-12 medium-12 columns'>" ),
						TextField::create("SecretDataEnc")->setTitle("Secrets")
							->setValue($thesecret),
					LiteralField::create("LiteralField","</div>" ),
				LiteralField::create("LiteralField","</div>" ) //end
			),
	    	FieldList::create(
	    		FormAction::create("doEditData")->setTitle("Edit Data")->addExtraClass('button tiny right')
	    	)
		);
		$Params = $this->getURLParams();
		if(is_numeric($Params['ID']) && $secrets = TheData::get()->filter(array(
			'ID' => $Params['ID']
		))->First())
		$form->loadDataFrom($secrets->data());
		return $form;
	}
	function doEditData($data, $form){
		$theID = $_POST["ID"];
		$submission =  TheData::get()->byID($theID);
		$form->saveInto($submission );
		$submission->Name = $submission->SecretDataEnc;
		$submission->SecretData = self::encryptInfo($submission->SecretDataEnc);
		$submission ->write();
		Controller::curr()->redirectback(); 
	}


}

*******************
*The Display Page *
*******************

<div class="large-12 medium-12 columns">
	<article>
		<h2>The Data</h2>
		<table class="full-width">
            <thead>
                <tr>
                    <th>ID</th>
                    <th>Copied Data</th>
                    <th>Secret Data</th>
                    <th>Actions</th>

                </tr>
            </thead>
           	<tbody>
			<% if $getsecrets %>
               	<% loop $getsecrets %>
	                <tr>
                        <td>$ID</td> 
                        <td >$Name</td>
                        <td>$SecretData</td>
                        <td><a href="$ELink">edit</a>
                    </tr>
	            <% end_loop %>
			<% else %>
				<tr>
					<td colspan="7"><p>No results</p></td>
				</tr>
            <% end_if %>
            </tbody>
        </table>
        <% if $Action = 'index' %>
			$AddData
		<% else %>
		<% if $Action = 'editsecret' %>
			$EditData
		<% end_if %>
		<% end_if %>
		
	</article>
</div>