- What's New
- Function Overview
- Service Overview
- Billing
- Getting Started
-
User Guide
- Key Management Service
- Cloud Secret Management Service
- Key Pair Service
- Dedicated HSM
- Tag Management
- Auditing Logs
- Activating a Dedicated HSM Instance Using a Shared VPC
- Updating a Resource Share
- Leaving a Resource Share
- Permission Control
-
Best Practices
- Key Management Service
- Cloud Secret Management Service
- General
-
API Reference
- Before You Start
- Calling APIs
- API Overview
-
APIs
-
Key Management APIs
- Key Lifecycle Management
- DEK Management
- Small-Size Data Encryption and Decryption
- Signature and Verification
- Key Tag Management
- Key API Version Query
- Querying Key API Versions
- Key Import Management
- Querying Keys
- Key Grant Management
- Key Rotation Management
- Dedicated Keystore Management
- Signature Verification
- Key Pair Management APIs
- Secret Management APIs
-
Key Management APIs
- Historical APIs
- Application Examples
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
-
FAQs
-
KMS Related
- What Is Key Management Service?
- What Is a Customer Master Key?
- What Is a Default Key?
- What Are the Differences Between a Custom Key and a Default Key?
- What Is a Data Encryption Key?
- Why Cannot I Delete a CMK Immediately?
- Which Cloud Services Can Use KMS for Encryption?
- How Do Huawei Cloud Services Use KMS to Encrypt Data?
- What Are the Benefits of Envelope Encryption?
- Is There a Limit on the Number of Custom Keys That I Can Create on KMS?
- Can I Export a CMK from KMS?
- Can I Decrypt My Data if I Permanently Delete My Custom Key?
- How Do I Use the Online Tool to Encrypt or Decrypt Small Volumes of Data?
- Can I Update CMKs Created by KMS-Generated Key Materials?
- When Should I Use a CMK Created with Imported Key Materials?
- What Should I Do When I Accidentally Delete Key Materials?
- How Are Default Keys Generated?
- What Should I Do If I Do Not Have the Permissions to Perform Operations on KMS?
- Why Can't I Wrap Asymmetric Keys by Using -id-aes256-wrap-pad in OpenSSL?
- Key Algorithms Supported by KMS
- What Should I Do If KMS Failed to Be Requested and Error Code 401 Is Displayed?
- What Is the Relationship Between the Ciphertext and Plaintext Returned by the encrypt-data API?
- CSMS Related
-
KPS Related
- How Do I Create a Key Pair?
- What Are a Private Key Pair and an Account Key Pair?
- How Do I Handle an Import Failure of a Key Pair Created Using PuTTYgen?
- What Should I Do When I Fail to Import a Key Pair Using Internet Explorer 9?
- How Do I Log In to a Linux ECS with a Private Key?
- How Do I Use a Private Key to Obtain the Password to Log In to a Windows ECS?
- How Do I Handle the Failure in Binding a Key Pair?
- How Do I Handle the Failure in Replacing a Key Pair?
- How Do I Handle the Failure in Resetting a Key Pair?
- How Do I Handle the Failure in Unbinding a Key Pair?
- Do I Need to Restart Servers After Replacing Its Key Pair?
- How Do I Enable the Password Login Mode for an ECS?
- How Do I Handle the Failure in Logging In to ECS After Unbinding the Key Pair?
- What Should I Do If My Private Key Is Lost?
- How Do I Convert the Format of a Private Key File?
- Can I Change the Key Pair of a Server?
- Can a Key Pair Be Shared by Multiple Users?
- How Do I Obtain the Public or Private Key File of a Key Pair?
- What Can I Do If an Error Is Reported When an Account Key Is Created or Upgraded for the First Time?
- Will the Account Key Pair Quota Be Occupied After a Private Key Pair Is Upgraded to an Account Key Pair?
-
Dedicated HSM Related
- What Is Dedicated HSM?
- How Does Dedicated HSM Ensure the Security for Key Generation?
- Do Equipment Room Personnel Has the Super Administrator Role to Steal Information by Using a Privileged UKey?
- What HSMs Are Used for Dedicated HSM?
- What APIs Does Dedicated HSM Support?
- How Do I Enable Public Access to a Dedicated HSM Instance?
- Pricing
- General
- Change History
-
KMS Related
- Videos
-
More Documents
- User Guide (ME-Abu Dhabi Region)
- User Guide (Paris and Amsterdam Regions)
-
User Guide (Kuala Lumpur Region)
- Service Overview
-
User Guide
- Key Management Service
- Cloud Secret Management Service
- Auditing Logs
- Permission Control
-
FAQs
-
KMS Related
- What Is Key Management Service?
- What Is a Customer Master Key?
- What Is a Default Key?
- What Are the Differences Between a Custom Key and a Default Key?
- What Is a Data Encryption Key?
- Why Cannot I Delete a CMK Immediately?
- Which Cloud Services Can Use KMS for Encryption?
- How Do Cloud Services Use KMS to Encrypt Data?
- What Are the Benefits of Envelope Encryption?
- Is There a Limit on the Number of Custom Keys That I Can Create on KMS?
- Can I Export a CMK from KMS?
- Can I Decrypt My Data if I Permanently Delete My Custom Key?
- How Do I Use the Online Tool to Encrypt or Decrypt Small Volumes of Data?
- Can I Update CMKs Created by KMS-Generated Key Materials?
- When Should I Use a CMK Created with Imported Key Materials?
- What Types of Keys Can I Import?
- What Should I Do When I Accidentally Delete Key Materials?
- How Are Default Keys Generated?
- What Should I Do If I Do Not Have the Permissions to Perform Operations on KMS?
- Why Can't I Wrap Asymmetric Keys by Using -id-aes256-wrap-pad in OpenSSL?
- Key Algorithms Supported by KMS
- What Should I Do If KMS Failed to Be Requested and Error Code 401 Is Displayed?
- What Is the Relationship Between the Ciphertext and Plaintext Returned by the encrypt-data API?
- How Does KMS Protect My Keys?
- Credential Related
-
KMS Related
- Change History
-
API Reference (ME-Abu Dhabi Region)
- Before You Start
- Calling APIs
- API Overview
-
APIs
- Creating a CMK
- Enabling a CMK
- Disabling a CMK
- Scheduling the Deletion of a CMK
- Canceling the Scheduled Deletion of a CMK
- Querying the List of CMKs
- Querying the Information About a CMK
- Creating a Random Number
- Creating a DEK
- Creating a Plaintext-Free DEK
- Encrypting a DEK
- Decrypting a DEK
- Querying the Number of Instances
- Querying the Quota of a User
- Changing the Alias of a CMK
- Changing the Description of a CMK
- Encrypting Data
- Decrypting Data
- Obtaining CMK Import Parameters
- Importing CMK Material
- Deleting CMK Material
- Querying CMK Instances
- Querying CMK Tags
- Querying Project Tags
- Adding or Deleting CMK Tags in Batches
- Adding a CMK Tag
- Deleting a CMK Tag
- Permissions Policies and Supported Actions
- Appendix
- Change History
-
API Reference (Paris and Amsterdam Regions)
- Before You Start
- Calling APIs
- API Overview
-
APIs
- Creating a CMK
- Enabling a CMK
- Disabling a CMK
- Scheduling the Deletion of a CMK
- Canceling the Scheduled Deletion of a CMK
- Querying the List of CMKs
- Querying the Information About a CMK
- Creating a Random Number
- Creating a DEK
- Creating a Plaintext-Free DEK
- Encrypting a DEK
- Decrypting a DEK
- Querying the Number of Instances
- Querying the Quota of a User
- Changing the Alias of a CMK
- Changing the Description of a CMK
- Creating a Grant
- Revoking a Grant
- Retiring a Grant
- Querying Grants on a CMK
- Querying Grants That Can Be Retired
- Encrypting Data
- Decrypting Data
- Obtaining CMK Import Parameters
- Importing CMK Material
- Deleting CMK Material
- Enabling Rotation for a CMK
- Changing the Rotation Interval for a CMK
- Disabling Rotation for a CMK
- Querying the Rotation Status of a CMK
- Appendix
- Change History
-
API Reference (Kuala Lumpur Region)
- Before You Start
- Calling APIs
- API Overview
-
APIs
- Creating a CMK
- Enabling a CMK
- Disabling a CMK
- Scheduling the Deletion of a CMK
- Canceling the Scheduled Deletion of a CMK
- Querying the List of CMKs
- Querying the Information About a CMK
- Creating a Random Number
- Creating a DEK
- Creating a Plaintext-Free DEK
- Encrypting a DEK
- Decrypting a DEK
- Querying the Number of Instances
- Querying the Quota of a User
- Changing the Alias of a CMK
- Changing the Description of a CMK
- Creating a Grant
- Revoking a Grant
- Retiring a Grant
- Querying Grants on a CMK
- Querying Grants That Can Be Retired
- Encrypting Data
- Decrypting Data
- Obtaining CMK Import Parameters
- Importing CMK Material
- Deleting CMK Material
- Enabling Rotation for a CMK
- Changing the Rotation Interval for a CMK
- Disabling Rotation for a CMK
- Querying the Rotation Status of a CMK
- Appendix
- Change History
- General Reference
On this page
Show all
Help Center/
Data Encryption Workshop/
User Guide (Kuala Lumpur Region)/
FAQs/
KMS Related/
When Should I Use a CMK Created with Imported Key Materials?
Copied.
When Should I Use a CMK Created with Imported Key Materials?
- If you do not want to use KMS-generated key materials, you can import your own key materials to create a CMK. Such a CMK allows deletion of only the key materials when you do not need it. In addition, when you find that the key materials are mis-deleted, you can import the same materials to the CMK.
- You can also import off-cloud key materials to KMS when you want to use the same keys on and off the cloud. This practice has proved useful when users migrate local encrypted data onto cloud.
Parent topic: KMS Related
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
The system is busy. Please try again later.
For any further questions, feel free to contact us through the chatbot.
Chatbot