Merge pull request #114322 from jlichwa/patch-14

Update about-secrets.md

Author: PRMerger6

articles/key-vault/secrets/about-secrets.md

@@ -23,6 +23,10 @@ For highly sensitive data, clients should consider additional layers of protecti
 
 Key Vault also supports a contentType field for secrets. Clients may specify the content type of a secret to assist in interpreting the secret data when it's retrieved. The maximum length of this field is 255 characters. There are no pre-defined values. The suggested usage is as a hint for interpreting the secret data. For instance, an implementation may store both passwords and certificates as secrets, then use this field to differentiate. There are no predefined values.  
 
+## Encryption
+
+All secrets in your Key Vault are stored encrypted. This encryption is transparent, and requires no action from the user. The Azure Key Vault service encrypts your secrets when you add them, and decrypts them automatically when you read them. The encryption key is unique to each key vault.
+
 ## Secret attributes
 
 In addition to the secret data, the following attributes may be specified: