QUESTION: 31 Exam Topic: Implement Azure security questions

You develop a REST API. You implement a user delegation SAS token to communicate with Azure Blob storage.

The token is compromised.
You need to revoke the token.

What are two possible ways to achieve this goal? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.

Revoke the delegation key.
Delete the stored access policy.
Regenerate the account key.
Remove the role assignment for the security principle.

Answer(s): A,B

Explanation:

A: Revoke a user delegation SAS
To revoke a user delegation SAS from the Azure CLI, call the az storage account revoke-delegation-keys command. This command revokes all of the user delegation keys associated with the specified storage account. Any shared access signatures associated with those keys are invalidated.

B: To revoke a stored access policy, you can either delete it, or rename it by changing the signed identifier. Changing the signed identifier breaks the associations between any existing signatures and the stored access policy. Deleting or renaming the stored access policy immediately effects all of the shared access signatures associated with it.

Reference:

https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/storage/blobs/storage-blob-user-delegation-sas-create-cli.md
https://docs.microsoft.com/en-us/rest/api/storageservices/define-stored-access-policy#modifying-or-revoking-a-stored-access-policy

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QUESTION: 32 Exam Topic: Implement Azure security questions

DRAG DROP (Drag & Drop is not supported)
You are developing an Azure-hosted application that must use an on-premises hardware security module (HSM) key.

The key must be transferred to your existing Azure Key Vault by using the Bring Your Own Key (BYOK) process.

You need to securely transfer the key to Azure Key Vault.

Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

See Explanation section for answer.

Answer(s): A

Explanation:

To perform a key transfer, a user performs following steps:
-Generate KEK.
-Retrieve the public key of the KEK.
-Using HSM vendor provided BYOK tool - Import the KEK into the target HSM and exports the Target Key protected by the KEK.
-Import the protected Target Key to Azure Key Vault.

Step 1: Generate a Key Exchange Key (KEK).

Step 2: Retrieve the Key Exchange Key (KEK) public key.

Step 3: Generate a key transfer blob file by using the HSM vendor-provided tool.
Generate key transfer blob using HSM vendor provided BYOK tool

Step 4: Run the az keyvault key import command
Upload key transfer blob to import HSM-key.
Customer will transfer the Key Transfer Blob (".byok" file) to an online workstation and then run a az keyvault key import command to import this blob as a new HSM-backed key into Key Vault.

To import an RSA key use this command:
az keyvault key import

Reference:

https://docs.microsoft.com/en-us/azure/key-vault/keys/byok-specification

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QUESTION: 33 Exam Topic: Implement Azure security questions

You develop and deploy an Azure Logic app that calls an Azure Function app. The Azure Function app includes an OpenAPI (Swagger) definition and uses an Azure Blob storage account. All resources are secured by using Azure Active Directory (Azure AD).

The Azure Logic app must securely access the Azure Blob storage account. Azure AD resources must remain if the Azure Logic app is deleted.

You need to secure the Azure Logic app.
What should you do?

Create a user-assigned managed identity and assign role-based access controls.
Create an Azure AD custom role and assign the role to the Azure Blob storage account.
Create an Azure Key Vault and issue a client certificate.
Create a system-assigned managed identity and issue a client certificate.
Create an Azure AD custom role and assign role-based access controls.

Answer(s): A

Explanation:

To give a managed identity access to an Azure resource, you need to add a role to the target resource for that identity.

Note: To easily authenticate access to other resources that are protected by Azure Active Directory (Azure AD) without having to sign in and provide credentials or secrets, your logic app can use a managed identity (formerly known as Managed Service Identity or MSI). Azure manages this identity for you and helps secure your credentials because you don't have to provide or rotate secrets.

If you set up your logic app to use the system-assigned identity or a manually created, user-assigned identity, the function in your logic app can also use that same identity for authentication.

Reference:

https://docs.microsoft.com/en-us/azure/logic-apps/create-managed-service-identity
https://docs.microsoft.com/en-us/azure/api-management/api-management-howto-mutual-certificates-for-clients

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QUESTION: 34 Exam Topic: Implement Azure security questions

HOTSPOT (Drag & Drop is not supported)
You are developing an application that uses a premium block blob storage account. You are optimizing costs by automating Azure Blob Storage access tiers.

You apply the following policy rules to the storage account. You must determine the implications of applying the rules to the data. (Line numbers are included for reference only.)

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

See Explanation section for answer.

Answer(s): A

Explanation:

Box 1: Yes

Box 2: Yes

Box 3: Yes

Box 4: Yes

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QUESTION: 31 Exam Topic: Implement Azure security questions

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