Merge pull request #77 from cose-wg/achamayou-patch-14

Update COSE_Encrypt scope and future considerations

Author: OR13

draft-ietf-cose-hash-envelope.md

@@ -184,6 +184,8 @@ Note that when using a pre-hash algorithm, the algorithm MUST be registered in t
 ## COSE_Encrypt
 
 Only COSE_Sign/COSE_Sign1 and COSE_Mac/COSE_Mac0 are in scope for this document. COSE_Encrypt/COSE_Encrypt0 is out of the scope of this document.
+At the time of publishing, there is no known use case for COSE_Encrypt/COSE_Encrypt0.
+It may be covered by a future extension, which would address whether the hash function is applied before or after encryption, and clarify privacy considerations.
 
 ## Payload Verification