## SME Terminology

The following SME-related terms are used in this book:

• SME interface—The security engine in the MSM-18/4 module or fixed slot of a Cisco MDS 9222i fabric switch. Each MSM-18/4 module and MDS 9222i switch has one security engine.

• SME cluster—A network of MDS switches that are configured to provide the SME functionality; each switch includes one or more MSM-18/4 modules and each module includes a security engine. Includes one or more nodes or switches for high availability (HA) and load balancing.

• Fabric—A physical fabric topology in the SAN as seen by DCNM-SAN. There can be multiple VSANs (logical fabrics) within the physical fabric.

• Tape group—A backup environment in the SAN. This consists of all the tape backup servers and the tape libraries that they access.

• Tape device—A tape drive that is configured for encryption.

• Tape volumes—A physical tape cartridge identified by a barcode for a given use.

• Tape volume group—A logical set of tape volumes that are configured for a specific use, for example, a group of tape volumes used to backup a database.

• Disk group—The disks that are grouped functionally to form disk groups.

• Disk—Disk is a LUN. A LUN is a logical unit that is exported to the host by the storage controller.

• IT-NEXUS—Initiator or Target pWWNs that defines a host to target connection.

• SME node—Each switch in the cluster is called an SME node and plays a role in determining if the cluster has a quorum.

• Cisco Key Management Center (CKMC)—A component of DCNM-SAN that stores the encryption keys.

• Master key—An encryption key generated when an SME cluster is created. The master key encrypts the tape volume keys and tape keys and it is required to decrypt those keys in order to retrieve encrypted data.

• Media key—A key that is used for encrypting and authenticating the data on specific tapes.

• Disk key—A key that is used for encrypting and authenticating the data on specific disks.

• SmartCard—A card (approximately the size of a credit card) with a built-in microprocessor and memory used for authentication.

• SME Administrator—An administrator who configures SME. This role includes the Cisco Storage Administrator role where the administrator manages the SME operations and the SME KMC Administrator role where the administrator is responsible for the SME key management operations.

• Storage Administrator —An administrator who manages the SME operations.

• SME KMC Administrator—An administrator who is responsible for the SME key management operations.

• SME Recovery Officer—A data security officer entrusted with smart cards and the associated PINs. Each smart card stores a share of the cluster master key. Recovery officers must present their cards and PINs to recover the key database of a deactivated cluster. A quorum of recovery officers are required to execute this operation.