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Returns usage information about the last successful cryptographic operation performed with a specified KMS key, including the operation type, timestamp, and associated CloudTrail event ID.
The TrackingStartDate in the GetKeyLastUsage response indicates the
date from which KMS began recording cryptographic activity for a given key. Use this
value together with KeyCreationDate to understand the key's usage history:
If the KeyLastUsage response element is present, the key has been used
for a successful cryptographic operation since the TrackingStartDate. The response
includes the operation type, timestamp, and associated CloudTrail event ID.
If the KeyLastUsage response element is empty and KeyCreationDate
is on or after TrackingStartDate, the key has not been used for a successful
cryptographic operation since it was created.
If the KeyLastUsage response element is empty and KeyCreationDate
is before TrackingStartDate, there is no record of the key being used for a
successful cryptographic operation since the TrackingStartDate. However, the
key may have been used before tracking began. To determine whether the key was used
before the TrackingStartDate, examine your past CloudTrail logs.
For multi-Region KMS keys, primary and replica keys track last usage independently. Each key in a multi-Region key set maintains its own usage information.
The ReEncrypt operation uses two keys: a source key for decryption and a destination
key for encryption. Usage information is recorded for both keys independently, each
with the CloudTrail event ID from the respective key owner's account.
Do not use GetKeyLastUsage as the sole indicator when scheduling a key for
deletion. Instead, first disable
the key and monitor CloudTrail for DisabledException entries, as there
could be infrequent workflows that are dependent on the key. By looking for this exception,
you can identify potential dependencies and workload failures before they occur.
Cross-account use: No. You cannot perform this operation on a KMS key in a different Amazon Web Services account.
Required permissions: kms:GetKeyLastUsage (key policy)
Related operations:
Eventual consistency: The KMS API follows an eventual consistency model. For more information, see KMS eventual consistency.
This is an asynchronous operation using the standard naming convention for .NET 4.7.2 or higher.
Namespace: Amazon.KeyManagementService
Assembly: AWSSDK.KeyManagementService.dll
Version: 3.x.y.z
public virtual Task<GetKeyLastUsageResponse> GetKeyLastUsageAsync( GetKeyLastUsageRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the GetKeyLastUsage service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
| Exception | Condition |
|---|---|
| DependencyTimeoutException | The system timed out while trying to fulfill the request. You can retry the request. |
| InvalidArnException | The request was rejected because a specified ARN, or an ARN in a key policy, is not valid. |
| KMSInternalException | The request was rejected because an internal exception occurred. The request can be retried. |
| NotFoundException | The request was rejected because the specified entity or resource could not be found. |
.NET:
Supported in: 8.0 and newer, Core 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.7.2 and newer