Cyber-Ark, the digital vaulting and data encryption specialist, has warned companies to protect their data following news that the 'Cult of the Dead Cow' hacking group has released Goolag Scan, a hacking utility overlay for Google.

"Advanced Google searching has been known about in security circles for some time, but it has been a highly specialised and technical topic that is definitely not for nonprogrammers," said Calum Macleod, CyberArk's European director.

"What Goolag Scan does is to allow even a novice to scan Google for interesting and normally hidden Web-based data, using more than 1,500 customised Google search routines," he added.

Data which can be revealed by the Windows-based application reportedly includes passwords on application servers, credit card numbers and allied databases held on Web-accessible portals, company email records and audit logs, and a variety of other company confidential information.

"A lot of companies protect their Web-based and internet gateway - accessible data using ID and password systems, but the actual data pages are often unprotected. Even though the pages are not indexed in the standard sense, Goolag Scan can prise the data out into the open and allow standard keyword searching on those pages," said Mr Macleod.