Update about-keys-details.md

Author: Ije-oyibo

articles/key-vault/keys/about-keys-details.md

@@ -123,7 +123,10 @@ In addition to the key material, the following attributes may be specified. In a
 There are more read-only attributes that are included in any response that includes key attributes:  
 
 - *created*: IntDate, optional. The *created* attribute indicates when this version of the key was created. The value is null for keys created prior to the addition of this attribute. Its value MUST be a number containing an IntDate value.  
-- *updated*: IntDate, optional. The *updated* attribute indicates when this version of the key was updated. The value is null for keys that were last updated prior to the addition of this attribute. Its value MUST be a number containing an IntDate value.  
+- *updated*: IntDate, optional. The *updated* attribute indicates when this version of the key was updated. The value is null for keys that were last updated prior to the addition of this attribute. Its value MUST be a number containing an IntDate value.
+- *hsmPlatform*: string, optional. The underlying HSM Platform that is protecting a key. A hsmPlatform value of 2 means the key is protected by our latest FIPS 140 Level 3 validated HSM platform. A HsmPlatform value of 1 refers to our previous FIPS 140 Level 2 HSM platform using nCipher HSMs.
+ 
+It’s important to note that keys are bound to the HSM in which they were created. New keys are seamlessly created using the new HSMs and will be stored in the new HSMs. While there is no way to migrate or transfer keys, newly created key versions will automatically be in the new HSMs.
 
 For more information on IntDate and other data types, see [About keys, secrets, and certificates: [Data types](../general/about-keys-secrets-certificates.md#data-types).