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Disk Encryption User Guide

OceanStor Dorado V3 Series V300R001

This document is applicable to OceanStor Dorado5000 V3, Dorado6000 V3 and Dorado18000 V3. This document 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

OceanStor Dorado V3 series storage systems support the disk encryption function that provides secure storage services without impacting storage performance.

The disk encryption function has the following characteristics:

  • 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 KMIP protocol 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.

The management of keys is an important factor in realizing the disk encryption feature. OceanStor Dorado V3 series storage systems support internal and external key management.

NOTE:

The internal key management is only applicable to V300R001C21 and later versions.

  • Internal key management is a method that uses system databases to store information about keys.
  • External key management is a method that uses third-party external key management servers to store information about keys.

    Table 1-1 shows the external third-party key management servers supported by the storage system.

Table 1-1 List of 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 is a kind of server that has passed FIPS certification and provides key storage and management functions. The server can be connected to storage systems and provide interfaces and functions required by the KMIP protocol. Therefore, the storage system 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 transfer from one method to the other, you need to delete original services and create self-encrypting disk domains. Otherwise, the disk encryption feature cannot take effect.

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Updated: 2018-11-01

Document ID: EDOC1000159246

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