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Removable storage devices have become widely accepted as tools that bring down
costs while increasing employee mobility and productivity. They allow employees
to easily and efficiently transport data between computers, allowing them to
remain productive wherever they are working.
As storage devices such as USB thumb drives, iPods, and Blackberrys are small
and seemingly innocuous, one rarely considers the security implications at hand.
However, their physical size and large storage capacity can make them an enormous
threat. For example, if a thumb drive containing business data is lost or stolen,
there could be severe consequences. In seconds, a rogue user can access proprietary
files and potentially expose a business to a massive data breach. These acts
can be referred to as "thumbsucking" -- the intentional or unintentional
use of a portable storage device to download confidential data from a network
endpoint. Lost and stolen equipment, including these removable storage devices,
is one of the top causes of data breaches and the process of identifying the
source of the breach, notifying impacted stakeholders, and preventing future
breaches have been costing organizations millions of dollars.
The Verizon Business RISK Team recently published an analysis of four years
(2004-2008) of security breaches and found 85 percent of those breaches are
opportunistic -- meaning, few hackers are proactively looking for missteps and
vulnerabilities, but they will take full advantage if one leaves an endpoint
device containing confidential data in a taxi or at an airport gate. Additionally,
some of the most common sources of data breaches are employees, including those
unaware of security practices or driven by malicious intent. In tandem with
these statistics, Verizon also discovered that 87 percent of the 230 million
compromised records researched in these four years could have been prevented
had the proper controls been in place.
While statutory and regulatory requirements can vary, organizations should
nonetheless be diligent when granting employees use of these devices, since
the simple concepts of "least privilege" and basic auditing practices
could prevent potential data breaches.
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