| NO_LEVEL | 0 | No security level is set for the KV store. |
| S0 | 1 | The KV store security level is public.|
| S1 | 2 | The KV store security level is low. If data leakage occurs, minor impact will be caused on the database. For example, a KV store that contains system data such as wallpapers.|
| S2 | 3 | The KV store security level is medium. If data leakage occurs, moderate impact will be caused on the database. For example, a KV store that contains information created by users or call records, such as audio or video clips.|
| S3 | 5 | The KV store security level is high. If data leakage occurs, major impact will be caused on the database. For example, a KV store that contains information such as user fitness, health, and location data.|
| S4 | 6 | The KV store security level is critical. If data leakage occurs, severe impact will be caused on the database. For example, a KV store that contains information such as authentication credentials and financial data.|
| NO_LEVEL | 0 | No security level is set for the KV store.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.DistributedKVStore |
| S0 | 1 | The KV store security level is public.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core |
| S1 | 2 | The KV store security level is low. If data leakage occurs, minor impact will be caused on the database. For example, a KV store that contains system data such as wallpapers.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core |
| S2 | 3 | The KV store security level is medium. If data leakage occurs, moderate impact will be caused on the database. For example, a KV store that contains information created by users or call records, such as audio or video clips.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core |
| S3 | 5 | The KV store security level is high. If data leakage occurs, major impact will be caused on the database. For example, a KV store that contains information such as user fitness, health, and location data.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core |
| S4 | 6 | The KV store security level is critical. If data leakage occurs, severe impact will be caused on the database. For example, a KV store that contains information such as authentication credentials and financial data.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core |
## Constants
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@@ -2086,7 +2085,7 @@ Adds a KV pair of the specified type to this KV store. This API uses an asynchro
| key | string | Yes |Key of the KV pair to add. It cannot be empty, and the length cannot exceed [MAX_KEY_LENGTH](#constants). |
| value | Uint8Array \| string \| number \| boolean | Yes |Value of the KV pair to add. The value type can be Uint8Array, number, string, or boolean. A value of the Uint8Array or string type cannot exceed [MAX_VALUE_LENGTH](#constants). |
| callback | AsyncCallback<void> | Yes |Callback used to return the result. |
| callback | AsyncCallback<void> | Yes |Callback invoked to return the result. |
**Example**
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@@ -2159,7 +2158,7 @@ Deletes a KV pair from this KV store. This API uses an asynchronous callback to
| enabled |boolean | Yes |Whether to enable data synchronization. The value **true** means to enable data synchronization, and **false** means the opposite. |
| callback |AsyncCallback<void> | Yes |Callback used to return the result. |
| callback |AsyncCallback<void> | Yes |Callback invoked to return the result. |
**Example**
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@@ -2814,7 +2813,7 @@ Sets the data synchronization range. This API uses an asynchronous callback to r
