--- 1/draft-ietf-dtn-bpsec-14.txt	2020-01-16 16:13:55.167725952 -0800
+++ 2/draft-ietf-dtn-bpsec-15.txt	2020-01-16 16:13:55.271728613 -0800
@@ -1,29 +1,31 @@
 
 Delay-Tolerant Networking                                     E. Birrane
 Internet-Draft                                               K. McKeever
 Obsoletes: 6257 (if approved)                                    JHU/APL
 Intended status: Standards Track                        January 16, 2020
 Expires: July 19, 2020
 
                  Bundle Protocol Security Specification
-                        draft-ietf-dtn-bpsec-14
+                        draft-ietf-dtn-bpsec-15
 
 Abstract
 
    This document defines a security protocol providing end to end data
    integrity and confidentiality services for the Bundle Protocol.
 
-   The Internet Research Task Force is advised that this document is an
-   update of the protocol described in [RFC6257], reflecting lessons
-   learned.  The Internet Research Task Force is requested to mark
-   [RFC6257] as obsolete.
+   This document is an update of the protocol described in RFC 6257,
+   reflecting lessons learned.  For this reason it obsoletes RFC 6257,
+   an IRTF-stream document.
+
+   Note to the RFC editor: The Internet Research Task Force is requested
+   to mark RFC6257 as obsolete.
 
 Status of This Memo
 
    This Internet-Draft is submitted in full conformance with the
    provisions of BCP 78 and BCP 79.
 
    Internet-Drafts are working documents of the Internet Engineering
    Task Force (IETF).  Note that other groups may also distribute
    working documents as Internet-Drafts.  The list of current Internet-
    Drafts is at https://datatracker.ietf.org/drafts/current/.
@@ -127,24 +130,26 @@
    transport security mechanisms may not be sufficient.  For example,
    the store-carry-forward nature of the network may require protecting
    data at rest, preventing unauthorized consumption of critical
    resources such as storage space, and operating without regular
    contact with a centralized security oracle (such as a certificate
    authority).
 
    An end-to-end security service is needed that operates in all of the
    environments where the BP operates.
 
-   The Internet Research Task Force is advised that this document is an
-   update of the protocol described in [RFC6257], reflecting lessons
-   learned.  The Internet Research Task Force is requested to mark
-   [RFC6257] as obsolete.
+   This document is an update of the protocol described in RFC 6257,
+   reflecting lessons learned.  For this reason it obsoletes RFC 6257,
+   an IRTF-stream document.
+
+   Note to the RFC editor: The Internet Research Task Force is requested
+   to mark RFC6257 as obsolete.
 
 1.1.  Supported Security Services
 
    BPSec provides end-to-end integrity and confidentiality services for
    BP bundles, as defined in this section.
 
    Integrity services ensure that changes to target data within a bundle
    can be discovered.  Data changes may be caused by processing errors,
    environmental conditions, or intentional manipulation.  In the
    context of BPSec, integrity services apply to plain-text in the