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AWS cli documentation change

Service: cli · 2026-06-07 · Documentation low

File: cli/latest/reference/payment-cryptography/start-key-usage.md

Summary

Updated AWS CLI version references from 2.34.61 to 2.34.63 and added documentation for HMAC key KCV computation method

Security assessment

Version change is routine. Added HMAC KCV documentation explains security validation for cryptographic keys, but shows no evidence of addressing a specific vulnerability.

Diff

diff --git a/cli/latest/reference/payment-cryptography/start-key-usage.md b/cli/latest/reference/payment-cryptography/start-key-usage.md
index 62d68f40f..e90ccc4cd 100644
--- a//cli/latest/reference/payment-cryptography/start-key-usage.md
+++ b//cli/latest/reference/payment-cryptography/start-key-usage.md
@@ -15 +15 @@
-  * [AWS CLI 2.34.61 Command Reference](../../index.html) »
+  * [AWS CLI 2.34.63 Command Reference](../../index.html) »
@@ -428 +428 @@ Key -> (structure)
->> For TDES keys, the KCV is computed by encrypting 8 bytes, each with value of zero, with the key to be checked and retaining the 3 highest order bytes of the encrypted result. For AES keys, the KCV is computed using a CMAC algorithm where the input data is 16 bytes of zero and retaining the 3 highest order bytes of the encrypted result.
+>> For TDES keys, the KCV is computed by encrypting 8 bytes, each with value of zero, with the key to be checked and retaining the 3 highest order bytes of the encrypted result. For AES keys, the KCV is computed using a CMAC algorithm where the input data is 16 bytes of zero and retaining the 3 highest order bytes of the encrypted result. For HMAC keys, the KCV is computed using the hash selected at key creation on a zero-length message, taking the leftmost 3 bytes.
@@ -649 +649 @@ Key -> (structure)
-  * [AWS CLI 2.34.61 Command Reference](../../index.html) »
+  * [AWS CLI 2.34.63 Command Reference](../../index.html) »