[PCI DSS 3.0] 3.5.3 Store cryptographic keys in the fewest possible locations.

3.5.3 Store cryptographic keys in the fewest possible locations.

3.5.3 Examine key storage locations and observe processes to verify that keys are stored in the fewest possible locations.

Storing cryptographic keys in the fewest locations helps an organization to keep track and monitor all key locations, and minimizes the potential for keys to be exposed to unauthorized parties.