diff --git a/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl b/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl
index ff710f1..75990da 100644
--- a/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl
+++ b/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl
@@ -335,7 +335,7 @@
      *     UdsCerts,
      *     DiceCertChain,
      *     SignedData<[
-     *         challenge: bstr .size (32..64), ; Provided by the method parameters
+     *         challenge: bstr .size (16..64), ; Provided by the method parameters
      *         bstr .cbor T,
      *     ]>,
      * ]
diff --git a/security/rkp/aidl/android/hardware/security/keymint/ProtectedData.aidl b/security/rkp/aidl/android/hardware/security/keymint/ProtectedData.aidl
index 3f699bc..bfe8417 100644
--- a/security/rkp/aidl/android/hardware/security/keymint/ProtectedData.aidl
+++ b/security/rkp/aidl/android/hardware/security/keymint/ProtectedData.aidl
@@ -134,7 +134,7 @@
      *     ]
      *
      *     SignedMacAad = [
-     *         challenge : bstr .size (32..64),   ; Size between 32 - 64
+     *         challenge : bstr .size (16..64),   ; Size between 16 - 64
      *                                            ; bytes inclusive
      *         VerifiedDeviceInfo,
      *         tag: bstr                 ; This is the tag from COSE_Mac0 of