[PCI DSS 3.0] [PCI DSS 3.0] 3.1 Keep cardholder data storage to a minimum by implementing data retention and disposal policies,

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3.1 Keep cardholder data storage to a
minimum by implementing data retention
and disposal policies, procedures and
processes that include at least the
following for all cardholder data (CHD)
storage:
 Limiting data storage amount and
retention time to that which is
required for legal, regulatory, and
business requirements
 Processes for secure deletion of data
when no longer needed
 Specific retention requirements for
cardholder data
 A quarterly process for identifying
and securely deleting stored
cardholder data that exceeds defined
retention.

3.1.a Examine the data retention and disposal policies,
procedures and processes to verify they include at least the
following:
 Legal, regulatory, and business requirements for data
retention, including
 Specific requirements for retention of cardholder data (for
example, cardholder data needs to be held for X period for
Y business reasons).
 Secure deletion of cardholder data when no longer needed
for legal, regulatory, or business reasons
 Coverage for all storage of cardholder data
 A quarterly process for identifying and securely deleting
stored cardholder data that exceeds defined retention
requirements.
3.1.b Interview personnel to verify that:
 All locations of stored cardholder data are included in the
data retention and disposal processes.
 Either a quarterly automatic or manual process is in place to
identify and securely delete stored cardholder data.
 The quarterly automatic or manual process is performed for
all locations of cardholder data.
3.1.c For a sample of system components that store cardholder data:
 Examine files and system records to verify that the data stored does not exceed the requirements defined in the data retention policy
 Observe the deletion mechanism to verify data is deleted securely.

A formal data retention policy identifies what data
needs to be retained, and where that data resides
so it can be securely destroyed or deleted as
soon as it is no longer needed.
The only cardholder data that may be stored after
authorization is the primary account number or
PAN (rendered unreadable), expiration date,
cardholder name, and service code.
Understanding where cardholder data is located
is necessary so it can be properly retained or
disposed of when no longer needed. In order to
define appropriate retention requirements, an
entity first needs to understand their own
business needs as well as any legal or regulatory
obligations that apply to their industry, and/or that
apply to the type of data being retained.

Identifying and deleting stored data that has
exceeded its specified retention period prevents
unnecessary retention of data that is no longer
needed. This process may be automated or
manual or a combination of both. For example, a
programmatic procedure (automatic or manual) to
locate and remove data and/or a manual review
of data storage areas could be performed.

Implementing secure deletion methods ensure
that the data cannot be retrieved when it is no
longer needed.

Remember, if you don't need it, don't store it!
 
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