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AWS cli medium security documentation change

Service: cli · 2026-06-04 · Security-related medium

File: cli/latest/reference/elasticache/complete-migration.md

Summary

Added documentation for StorageEncryptionType, Durability, and EffectiveDurability fields. Updated AtRestEncryptionEnabled behavior and default values.

Security assessment

The changes clarify encryption behaviors (including SSE-KMS support) and durability settings which are critical for data security and integrity. Specifically documents how to verify effective encryption state and resolves previous ambiguity about when encryption is enabled.

Diff

diff --git a/cli/latest/reference/elasticache/complete-migration.md b/cli/latest/reference/elasticache/complete-migration.md
index fe50aedbb..cd358201c 100644
--- a//cli/latest/reference/elasticache/complete-migration.md
+++ b//cli/latest/reference/elasticache/complete-migration.md
@@ -15 +15 @@
-  * [AWS CLI 2.34.57 Command Reference](../../index.html) »
+  * [AWS CLI 2.34.61 Command Reference](../../index.html) »
@@ -583 +583 @@ ReplicationGroup -> (structure)
->> A flag that enables encryption at-rest when set to `true` .
+>> A flag that enables encryption at-rest on the cluster when set to `true` . In some cases, encryption at-rest may be enabled even when this value is false. Use `StorageEncryptionType` to view the effective encryption state of a cluster.
@@ -585 +585 @@ ReplicationGroup -> (structure)
->> You cannot modify the value of `AtRestEncryptionEnabled` after the cluster is created. To enable encryption at-rest on a cluster you must set `AtRestEncryptionEnabled` to `true` when you create a cluster.
+>> You cannot modify the value of `AtRestEncryptionEnabled` after the cluster is created.
@@ -587,3 +587 @@ ReplicationGroup -> (structure)
->>> **Required:** Only available when creating a replication group in an Amazon VPC using Redis OSS version `3.2.6` , `4.x` or later.
->> 
->> Default: `false`
+>> Default: `true` when using Valkey, `false` when using Redis OSS
@@ -599,0 +598,12 @@ ReplicationGroup -> (structure)
+> 
+> StorageEncryptionType -> (string)
+>
+>> Indicates the type of encryption for data stored at rest in the replication group. The value is `none` if at-rest encryption is not enabled, `sse-elasticache` if an ElastiCache service-managed key is used, or `sse-kms` if a customer-managed KMS key is used.
+>> 
+>> Possible values:
+>> 
+>>   * `none`
+>>   * `sse-elasticache`
+>>   * `sse-kms`
+>> 
+
@@ -764,0 +775,25 @@ ReplicationGroup -> (structure)
+> 
+> Durability -> (string)
+>
+>> The durability setting of the replication group. For more information, see [Durability](http://docs.aws.amazon.com/AmazonElastiCache/latest/dg/Durability.html) .
+>> 
+>> Possible values:
+>> 
+>>   * `default`
+>>   * `async`
+>>   * `sync`
+>>   * `disabled`
+>> 
+
+> 
+> EffectiveDurability -> (string)
+>
+>> The effective durability of the replication group. When `Durability` is set to `default` , the service resolves the actual durability based on the engine version, cluster mode, and other parameters. This field reflects the resolved value. For more information, see [Configuring Durability](http://docs.aws.amazon.com/AmazonElastiCache/latest/dg/ConfiguringDurability.html) .
+>> 
+>> Possible values:
+>> 
+>>   * `async`
+>>   * `sync`
+>>   * `disabled`
+>> 
+
@@ -776 +811 @@ ReplicationGroup -> (structure)
-  * [AWS CLI 2.34.57 Command Reference](../../index.html) »
+  * [AWS CLI 2.34.61 Command Reference](../../index.html) »