public function decryptEmailToken($t)
	{
		// returns 3 element array, depending on the context, userid will be first,
		// followed by another id (groupid, ticketid, etc) and a timestamp indicating
		// the age of the token if you want to consider expiring it after a certain age

		// strip the unencrypted version and action bytes at the beginning of the token
		$rawtoken = substr($t, 4);

		// Convert from hex to bin
		$encrypted = hex2bin($rawtoken);

		// Do the decryption
		$cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', 'cbc', '');
		mcrypt_generic_init($cipher, $this->_key, $this->_iv);
		$decrypted = mdecrypt_generic($cipher, $encrypted);

		// unpack the original values, no need to strip padding or hash 
		// we'll just unpack what we need
		$arr = unpack("N3", $decrypted);
		return array($arr[1], $arr[2], $arr[3]);
	}