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Disk Encryption User Guide

OceanStor V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5300F V5, 5500 V5, 5500F V5, 5600 V5, 5600F V5, 5800 V5, 5800F V5, 6800 V5, 6800F V5, 18500 V5, 18500F V5, 18800 V5, and 18800F V5. It introduces how to install and configure key management servers connected to the storage systems that use self-encrypting disks.
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Overview

Overview

The OceanStor V5 storage systems support disk encryption, which provides secure storage services without impacting storage performance.

The disk encryption function has the following characteristics:

  • The storage performance is not affected. The encryption/decryption rate reaches the disk interface's limit speed. Therefore, during data protection, no additional delay is caused.
  • Data in all disks is encrypted transparently without affecting other features such as mirroring, snapshot, deduplication, and compression.
  • Automatic key life cycle management and the Key Management Interoperability Protocol (KMIP) are supported, ensuring the openness of key management systems.

When you enable disk encryption, the storage system activates the AutoLock function on self-encrypting drives (SEDs) and uses the authentication keys (AKs) allocated by the key management server. SED access is protected by the AutoLock function and only the storage system itself can access its SEDs. When the storage system accesses an SED, it acquires an AK from the key management server. If the AK is consistent with the SED's, the SED decrypts the data encryption key (DEK) for data encryption/decryption. If the AKs do not match, all read and write operations will fail.

Key management is critical for disk encryption. The OceanStor V5 storage systems support internal and external key management.

  • Internal key management stores keys in the storage system's database.
  • External key management stores keys on third-party external key management servers.
Table 1-1 shows the external third-party key management servers supported by the storage system.
Table 1-1 External third-party key management servers

Name

Vendor

Reference Link

keyAuthority

Thales

Configuring and Managing the Key Management Server (keyAuthority)

keySecure

SafeNet

Configuring and Managing the Key Management Server (KeySecure)

NOTE:

The key management server has passed FIPS certification and provides key storage and management functions. The server can be connected to storage systems to provide interfaces and functions required by the KMIP protocol. The storage systems can invoke these interfaces to create, update, destroy, and query keys required by the disk encryption service.

Table 1-2 shows the comparison between internal and external key management.

Table 1-2 Comparison between internal and external key management

Management Mode

Whether the Third-Party External Key Management Server Is Used

Cost

Whether the Management of Multiple Devices' Keys Is Supported

Internal key management

No

Low

No

External key management

Yes

High

Yes

You cannot use internal and external key management at the same time. When you change from one method to the other, you must delete original services and re-create self-encrypting disk domains. Otherwise, disk encryption cannot take effect.

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Updated: 2019-07-11

Document ID: EDOC1000181504

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