At the same time, organizations, particularly those in highly
regulated sectors, find themselves subject to increasing amounts
of pressure from auditors, regulators and customers to safeguard
data storage from loss, theft and inappropriate access. The
Payment Card Industry (PCI) Data Security Standard, which
requires all payment card information to be encrypted, is one
example of such regulation. When considering encryption,
remember that it can be applied to data in-flight or data at-
rest. Data in-flight refers to information encrypted when in
transit from one point to another, for example over the local-
area network (LAN) or wide-area network (WAN). Encryption of
data at-rest occurs when information is stored on media such as
disk or tape. Storage encryption is concerned with data at-rest
rather than encryption of data in-flight, which is provided at
the network layer and comes embedded in hardware from vendors
such as Brocade and Cisco Systems. There are several ways to
enable storage encryption: - Through