Gazelle/sections/schedule/biweekly/cycle_auth_keys.php

<?php

//------------- Cycle auth keys -----------------------------------------//

$DB->query(
    "
  UPDATE users_info
  SET AuthKey =
    MD5(
      CONCAT(
        AuthKey, RAND(), '".db_string(Users::make_secret())."',
        SHA1(
          CONCAT(
            RAND(), RAND(), '".db_string(Users::make_secret())."'
          )
        )
      )
    );"
);