rfc9952.original.xml   rfc9952.xml 
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<front> <front>
<title abbrev="CoRE ALPN">ALPN ID Specification for CoAP over DTLS</title> <title abbrev="ALPN ID for CoAP over DTLS">Application-Layer Protocol Negoti
<seriesInfo name="Internet-Draft" value="draft-ietf-core-coap-dtls-alpn-05"/ ation (ALPN) ID for CoAP over DTLS</title>
> <seriesInfo name="RFC" value="9952"/>
<author fullname="Martine Sophie Lenders"> <author fullname="Martine Sophie Lenders">
<organization abbrev="TU Dresden">TUD Dresden University of Technology</or ganization> <organization abbrev="TU Dresden">TUD Dresden University of Technology</or ganization>
<address> <address>
<postal> <postal>
<street>Helmholtzstr. 10</street> <street>Helmholtzstr. 10</street>
<city>Dresden</city> <city>Dresden</city>
<code>D-01069</code> <code>D-01069</code>
<country>Germany</country> <country>Germany</country>
</postal> </postal>
<email>martine.lenders@tu-dresden.de</email> <email>martine.lenders@tu-dresden.de</email>
skipping to change at line 57 skipping to change at line 57
<address> <address>
<postal> <postal>
<street>Helmholtzstr. 10</street> <street>Helmholtzstr. 10</street>
<city>Dresden</city> <city>Dresden</city>
<code>D-01069</code> <code>D-01069</code>
<country>Germany</country> <country>Germany</country>
</postal> </postal>
<email>m.waehlisch@tu-dresden.de</email> <email>m.waehlisch@tu-dresden.de</email>
</address> </address>
</author> </author>
<date year="2025" month="August" day="11"/> <date year="2026" month="March"/>
<area>Web and Internet Transport</area> <area>WIT</area>
<workgroup>Constrained RESTful Environments</workgroup> <workgroup>core</workgroup>
<keyword>CoRE</keyword> <keyword>CoRE</keyword>
<keyword>CoAP</keyword> <keyword>CoAP</keyword>
<keyword>SVCB</keyword> <keyword>SVCB</keyword>
<keyword>DTLS</keyword> <keyword>DTLS</keyword>
<keyword>ALPN</keyword> <keyword>ALPN</keyword>
<abstract> <abstract>
<?line 68?> <?line 87?>
<t>This document specifies an Application-Layer Protocol Negotiation (ALPN) ID f or <t>This document specifies an Application-Layer Protocol Negotiation (ALPN) ID f or
transport-layer-secured Constrained Application Protocol (CoAP) services.</t> Constrained Application Protocol (CoAP) services that are secured by DTLS.</t>
</abstract> </abstract>
<note removeInRFC="true">
<name>About This Document</name>
<t>
The latest revision of this draft can be found at <eref target="https://
core-wg.github.io/coap-dtls-alpn/draft-ietf-core-coap-dtls-alpn.html"/>.
Status information for this document may be found at <eref target="https
://datatracker.ietf.org/doc/draft-ietf-core-coap-dtls-alpn/"/>.
</t>
<t>
Discussion of this document takes place on the
Constrained RESTful Environments Working Group mailing list (<eref targe
t="mailto:core@ietf.org"/>),
which is archived at <eref target="https://mailarchive.ietf.org/arch/bro
wse/core/"/>.
Subscribe at <eref target="https://www.ietf.org/mailman/listinfo/core/"/
>.
</t>
<t>Source for this draft and an issue tracker can be found at
<eref target="https://github.com/core-wg/coap-dtls-alpn"/>.</t>
</note>
</front> </front>
<middle> <middle>
<?line 73?> <?line 122?>
<section anchor="introduction"> <section anchor="introduction">
<name>Introduction</name> <name>Introduction</name>
<t>Application-Layer Protocol Negotiation (ALPN) enables communicating par ties to agree on an application-layer protocol during a Transport Layer Security (TLS) handshake using an ALPN ID <xref target="RFC7301"/>. <t>Application-Layer Protocol Negotiation (ALPN) enables communicating par ties to agree on an application-layer protocol during a Transport Layer Security (TLS) handshake using an ALPN ID <xref target="RFC7301"/>.
This ALPN ID can be discovered for services as part of Service Bindings (SVCB) v This ALPN ID can be discovered for services as part of Service Bindings (SVCBs)
ia the DNS, using SVCB resource records with the "alpn" Service Parameter Keys < via the DNS, using SVCB resource records with the "alpn" Service Parameter Keys
xref target="RFC9460"/>. <xref target="RFC9460"/>.
As an example, applications that use the Constrained Application Protocol (CoAP) As an example, applications that use the Constrained Application Protocol (CoAP)
<xref target="RFC7252"/> can obtain this information as part of the discovery o <xref target="RFC7252"/> can obtain this information as part of the discovery o
f DNS over CoAP (DoC) servers (see <xref section="3.2" sectionFormat="of" target f DNS over CoAP (DoC) servers (see <xref section="3.2" sectionFormat="of" target
="I-D.ietf-core-dns-over-coap"/>) that deploy TLS 1.3 <xref target="RFC8446"/> a ="RFC9953"/>) that deploy TLS 1.3 <xref target="RFC8446"/> as well as Datagram T
s well as Datagram Transport Layer Security (DTLS) 1.2 or 1.3 <xref target="RFC6 ransport Layer Security (DTLS) 1.2 or 1.3 <xref target="RFC6347"/> <xref target=
347"/> <xref target="RFC9147"/> to secure their messages. "RFC9147"/> to secure their messages.
This document specifies an ALPN ID for CoAP services that are secured by transpo This document specifies an ALPN ID for CoAP services that are secured by DTLS.
rt layer security using DTLS.
An ALPN ID for CoAP services secured by TLS has already been specified in <xref target="RFC8323"/>.</t> An ALPN ID for CoAP services secured by TLS has already been specified in <xref target="RFC8323"/>.</t>
</section> </section>
<section anchor="application-layer-protocol-negotiation-alpn-ids"> <section anchor="application-layer-protocol-negotiation-alpn-ids">
<name>Application-Layer Protocol Negotiation (ALPN) IDs</name> <name>Application-Layer Protocol Negotiation (ALPN) IDs</name>
<t>For CoAP over TLS, an ALPN ID was defined as "coap" in <xref target="RF <t>For CoAP over TLS, an ALPN ID is defined as "coap" in <xref target="RFC
C8323"/>. 8323"/>.
As it is not advisable to re-use the same ALPN ID for a different transport laye As it is not advisable to reuse the same ALPN ID for a different transport layer
r, an ALPN for , an ALPN for
CoAP over DTLS is registered in <xref target="iana-coap-alpn"/>.</t> CoAP over DTLS is registered in <xref target="iana"/>.</t>
<t>ALPN ID values have variable length. <t>ALPN ID values have variable length.
For CoAP over DTLS, a short value ("co") is allocated, as this can avoid fragmen tation of Client Hello and Server Hello messages in constrained networks with li nk-layer fragmentation, such as 6LoWPAN <xref target="RFC4944"/>.</t> For CoAP over DTLS, a short value ("co") is allocated, as this can avoid fragmen tation of Client Hello and Server Hello messages in constrained networks with li nk-layer fragmentation, such as 6LoWPAN <xref target="RFC4944"/>.</t>
<t>To discover CoAP services that secure their messages with TLS or DTLS, the ALPN IDs "coap" and "co" can be used, respectively, in <t>To discover CoAP services that secure their messages with TLS or DTLS, the ALPN IDs "coap" and "co" can be used, respectively, in
the same manner as for any other service secured with transport layer security, as the same manner as for any other service secured with TLS, as
described in <xref target="RFC9460"/>. described in <xref target="RFC9460"/>.
The discovery of CoAP services that rely on other security mechanisms is out of the scope of this document.</t> The discovery of CoAP services that rely on other security mechanisms is out of the scope of this document.</t>
</section> </section>
<section anchor="security-considerations"> <section anchor="security-considerations">
<name>Security Considerations</name> <name>Security Considerations</name>
<t>Any security considerations on ALPN (see <xref target="RFC7301"/>) and SVCB resource records (see <xref target="RFC9460"/>) also apply to this document .</t> <t>Any security considerations for ALPN (see <xref target="RFC7301"/>) and SVCB resource records (see <xref target="RFC9460"/>) also apply to this documen t.</t>
</section> </section>
<section anchor="iana"> <section anchor="iana">
<name>IANA Considerations</name> <name>IANA Considerations</name>
<t><cref anchor="replace-xxxx">RFC Ed.: throughout this section, please re <t>IANA has added the following entry to the "TLS Application-Layer Protoc
place ol Negotiation (ALPN) Protocol IDs" registry in the "Transport Layer Security (T
RFC-XXXX with the RFC number of this specification and remove this LS) Extensions" registry group.</t>
note.</cref></t> <table anchor="table1">
<t>This document has the following actions for IANA.</t> <name>TLS Application-Layer Protocol Negotiation (ALPN) Protocol IDs Reg
<section anchor="iana-coap-alpn"> istry</name>
<name>TLS ALPN for CoAP</name> <thead>
<t>The following entry has been added to the "TLS Application-Layer Prot <tr>
ocol Negotiation (ALPN) Protocol IDs" registry, which is part of the "Transport <th align="left">Protocol</th>
Layer Security (TLS) Extensions" registry group.</t> <th align="left">Identification Sequence</th>
<ul spacing="normal"> <th align="left">Reference</th>
<li> </tr>
<t>Protocol: CoAP (over DTLS)</t> </thead>
</li> <tbody>
<li> <tr>
<t>Identification sequence: 0x63 0x6f ("co")</t> <td align="left">CoAP (over DTLS)</td>
</li> <td align="left">0x63 0x6f ("co")</td>
<li> <td align="left">
<t>Reference: <xref target="RFC7252"/> and [RFC-XXXX]</t> <xref target="RFC7252"/>, RFC 9952</td>
</li> </tr>
</ul> </tbody>
<t>Note that <xref target="RFC7252"/> does not define the use of the ALP </table>
N TLS extension during the DTLS connection handshake. <t>Note that <xref target="RFC7252"/> does not define the use of the ALPN
This document does not change this behavior, and thus does not establish any rul TLS extension during the DTLS connection handshake.
es like those in <xref section="8.2" sectionFormat="of" target="RFC8323"/>.</t> This document does not change this behavior and thus does not establish any rule
</section> s like those in <xref section="8.2" sectionFormat="of" target="RFC8323"/>.</t>
</section> </section>
</middle> </middle>
<back> <back>
<references anchor="sec-combined-references"> <references anchor="sec-combined-references">
<name>References</name> <name>References</name>
<references anchor="sec-normative-references"> <references anchor="sec-normative-references">
<name>Normative References</name> <name>Normative References</name>
<reference anchor="RFC6347"> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.6
<front> 347.xml"/>
<title>Datagram Transport Layer Security Version 1.2</title> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.7
<author fullname="E. Rescorla" initials="E." surname="Rescorla"/> 252.xml"/>
<author fullname="N. Modadugu" initials="N." surname="Modadugu"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.7
<date month="January" year="2012"/> 301.xml"/>
<abstract> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.9
<t>This document specifies version 1.2 of the Datagram Transport L 147.xml"/>
ayer Security (DTLS) protocol. The DTLS protocol provides communications privacy <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.9
for datagram protocols. The protocol allows client/server applications to commu 460.xml"/>
nicate in a way that is designed to prevent eavesdropping, tampering, or message
forgery. The DTLS protocol is based on the Transport Layer Security (TLS) proto
col and provides equivalent security guarantees. Datagram semantics of the under
lying transport are preserved by the DTLS protocol. This document updates DTLS 1
.0 to work with TLS version 1.2. [STANDARDS-TRACK]</t>
</abstract>
</front>
<seriesInfo name="RFC" value="6347"/>
<seriesInfo name="DOI" value="10.17487/RFC6347"/>
</reference>
<reference anchor="RFC7252">
<front>
<title>The Constrained Application Protocol (CoAP)</title>
<author fullname="Z. Shelby" initials="Z." surname="Shelby"/>
<author fullname="K. Hartke" initials="K." surname="Hartke"/>
<author fullname="C. Bormann" initials="C." surname="Bormann"/>
<date month="June" year="2014"/>
<abstract>
<t>The Constrained Application Protocol (CoAP) is a specialized we
b transfer protocol for use with constrained nodes and constrained (e.g., low-po
wer, lossy) networks. The nodes often have 8-bit microcontrollers with small amo
unts of ROM and RAM, while constrained networks such as IPv6 over Low-Power Wire
less Personal Area Networks (6LoWPANs) often have high packet error rates and a
typical throughput of 10s of kbit/s. The protocol is designed for machine- to-ma
chine (M2M) applications such as smart energy and building automation.</t>
<t>CoAP provides a request/response interaction model between appl
ication endpoints, supports built-in discovery of services and resources, and in
cludes key concepts of the Web such as URIs and Internet media types. CoAP is de
signed to easily interface with HTTP for integration with the Web while meeting
specialized requirements such as multicast support, very low overhead, and simpl
icity for constrained environments.</t>
</abstract>
</front>
<seriesInfo name="RFC" value="7252"/>
<seriesInfo name="DOI" value="10.17487/RFC7252"/>
</reference>
<reference anchor="RFC7301">
<front>
<title>Transport Layer Security (TLS) Application-Layer Protocol Neg
otiation Extension</title>
<author fullname="S. Friedl" initials="S." surname="Friedl"/>
<author fullname="A. Popov" initials="A." surname="Popov"/>
<author fullname="A. Langley" initials="A." surname="Langley"/>
<author fullname="E. Stephan" initials="E." surname="Stephan"/>
<date month="July" year="2014"/>
<abstract>
<t>This document describes a Transport Layer Security (TLS) extens
ion for application-layer protocol negotiation within the TLS handshake. For ins
tances in which multiple application protocols are supported on the same TCP or
UDP port, this extension allows the application layer to negotiate which protoco
l will be used within the TLS connection.</t>
</abstract>
</front>
<seriesInfo name="RFC" value="7301"/>
<seriesInfo name="DOI" value="10.17487/RFC7301"/>
</reference>
<reference anchor="RFC9147">
<front>
<title>The Datagram Transport Layer Security (DTLS) Protocol Version
1.3</title>
<author fullname="E. Rescorla" initials="E." surname="Rescorla"/>
<author fullname="H. Tschofenig" initials="H." surname="Tschofenig"/
>
<author fullname="N. Modadugu" initials="N." surname="Modadugu"/>
<date month="April" year="2022"/>
<abstract>
<t>This document specifies version 1.3 of the Datagram Transport L
ayer Security (DTLS) protocol. DTLS 1.3 allows client/server applications to com
municate over the Internet in a way that is designed to prevent eavesdropping, t
ampering, and message forgery.</t>
<t>The DTLS 1.3 protocol is based on the Transport Layer Security
(TLS) 1.3 protocol and provides equivalent security guarantees with the exceptio
n of order protection / non-replayability. Datagram semantics of the underlying
transport are preserved by the DTLS protocol.</t>
<t>This document obsoletes RFC 6347.</t>
</abstract>
</front>
<seriesInfo name="RFC" value="9147"/>
<seriesInfo name="DOI" value="10.17487/RFC9147"/>
</reference>
<reference anchor="RFC9460">
<front>
<title>Service Binding and Parameter Specification via the DNS (SVCB
and HTTPS Resource Records)</title>
<author fullname="B. Schwartz" initials="B." surname="Schwartz"/>
<author fullname="M. Bishop" initials="M." surname="Bishop"/>
<author fullname="E. Nygren" initials="E." surname="Nygren"/>
<date month="November" year="2023"/>
<abstract>
<t>This document specifies the "SVCB" ("Service Binding") and "HTT
PS" DNS resource record (RR) types to facilitate the lookup of information neede
d to make connections to network services, such as for HTTP origins. SVCB record
s allow a service to be provided from multiple alternative endpoints, each with
associated parameters (such as transport protocol configuration), and are extens
ible to support future uses (such as keys for encrypting the TLS ClientHello). T
hey also enable aliasing of apex domains, which is not possible with CNAME. The
HTTPS RR is a variation of SVCB for use with HTTP (see RFC 9110, "HTTP Semantics
"). By providing more information to the client before it attempts to establish
a connection, these records offer potential benefits to both performance and pri
vacy.</t>
</abstract>
</front>
<seriesInfo name="RFC" value="9460"/>
<seriesInfo name="DOI" value="10.17487/RFC9460"/>
</reference>
</references> </references>
<references anchor="sec-informative-references"> <references anchor="sec-informative-references">
<name>Informative References</name> <name>Informative References</name>
<reference anchor="RFC8323"> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8
<front> 323.xml"/>
<title>CoAP (Constrained Application Protocol) over TCP, TLS, and We <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8
bSockets</title> 446.xml"/>
<author fullname="C. Bormann" initials="C." surname="Bormann"/>
<author fullname="S. Lemay" initials="S." surname="Lemay"/> <!-- [I-D.ietf-core-dns-over-coap] - RFC 9953
<author fullname="H. Tschofenig" initials="H." surname="Tschofenig"/ draft-ietf-core-dns-over-coap-20
> Companion document (C554)
<author fullname="K. Hartke" initials="K." surname="Hartke"/> -->
<author fullname="B. Silverajan" initials="B." surname="Silverajan"/ <reference anchor="RFC9953" target="https://www.rfc-editor.org/info/rfc9
> 953">
<author fullname="B. Raymor" initials="B." role="editor" surname="Ra
ymor"/>
<date month="February" year="2018"/>
<abstract>
<t>The Constrained Application Protocol (CoAP), although inspired
by HTTP, was designed to use UDP instead of TCP. The message layer of CoAP over
UDP includes support for reliable delivery, simple congestion control, and flow
control.</t>
<t>Some environments benefit from the availability of CoAP carried
over reliable transports such as TCP or Transport Layer Security (TLS). This do
cument outlines the changes required to use CoAP over TCP, TLS, and WebSockets t
ransports. It also formally updates RFC 7641 for use with these transports and R
FC 7959 to enable the use of larger messages over a reliable transport.</t>
</abstract>
</front>
<seriesInfo name="RFC" value="8323"/>
<seriesInfo name="DOI" value="10.17487/RFC8323"/>
</reference>
<reference anchor="RFC8446">
<front>
<title>The Transport Layer Security (TLS) Protocol Version 1.3</titl
e>
<author fullname="E. Rescorla" initials="E." surname="Rescorla"/>
<date month="August" year="2018"/>
<abstract>
<t>This document specifies version 1.3 of the Transport Layer Secu
rity (TLS) protocol. TLS allows client/server applications to communicate over t
he Internet in a way that is designed to prevent eavesdropping, tampering, and m
essage forgery.</t>
<t>This document updates RFCs 5705 and 6066, and obsoletes RFCs 50
77, 5246, and 6961. This document also specifies new requirements for TLS 1.2 im
plementations.</t>
</abstract>
</front>
<seriesInfo name="RFC" value="8446"/>
<seriesInfo name="DOI" value="10.17487/RFC8446"/>
</reference>
<reference anchor="I-D.ietf-core-dns-over-coap">
<front> <front>
<title>DNS over CoAP (DoC)</title> <title>DNS over CoAP (DoC)</title>
<author fullname="Martine Sophie Lenders" initials="M. S." surname=" <author fullname="Martine Sophie Lenders">
Lenders"> <organization/>
<organization>TUD Dresden University of Technology</organization>
</author> </author>
<author fullname="Christian Amsüss" initials="C." surname="Amsüss"> <author fullname="Christian Amsüss">
</author> <organization/>
<author fullname="Cenk Gündoğan" initials="C." surname="Gündoğan">
<organization>NeuralAgent GmbH</organization>
</author> </author>
<author fullname="Thomas C. Schmidt" initials="T. C." surname="Schmi <author fullname="Cenk Gündoğan">
dt"> <organization/>
<organization>HAW Hamburg</organization>
</author> </author>
<author fullname="Matthias Wählisch" initials="M." surname="Wählisch <author fullname="Thomas C. Schmidt">
"> <organization/>
<organization>TUD Dresden University of Technology &amp; Barkhause
n Institut</organization>
</author> </author>
<date day="24" month="July" year="2025"/> <author fullname="Matthias Wählisch">
<abstract> <organization/>
<t> This document defines a protocol for exchanging DNS messages </author>
over the <date year="2026" month="March"/>
Constrained Application Protocol (CoAP). These CoAP messages can be
protected by (D)TLS-Secured CoAP (CoAPS) or Object Security for
Constrained RESTful Environments (OSCORE) to provide encrypted DNS
message exchange for constrained devices in the Internet of Things
(IoT).
</t>
</abstract>
</front>
<seriesInfo name="Internet-Draft" value="draft-ietf-core-dns-over-coap
-17"/>
</reference>
<reference anchor="RFC4944">
<front>
<title>Transmission of IPv6 Packets over IEEE 802.15.4 Networks</tit
le>
<author fullname="G. Montenegro" initials="G." surname="Montenegro"/
>
<author fullname="N. Kushalnagar" initials="N." surname="Kushalnagar
"/>
<author fullname="J. Hui" initials="J." surname="Hui"/>
<author fullname="D. Culler" initials="D." surname="Culler"/>
<date month="September" year="2007"/>
<abstract>
<t>This document describes the frame format for transmission of IP
v6 packets and the method of forming IPv6 link-local addresses and statelessly a
utoconfigured addresses on IEEE 802.15.4 networks. Additional specifications inc
lude a simple header compression scheme using shared context and provisions for
packet delivery in IEEE 802.15.4 meshes. [STANDARDS-TRACK]</t>
</abstract>
</front> </front>
<seriesInfo name="RFC" value="4944"/> <seriesInfo name="RFC" value="9953"/>
<seriesInfo name="DOI" value="10.17487/RFC4944"/> <seriesInfo name="DOI" value="10.17487/RFC9953"/>
</reference> </reference>
<xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.4 944.xml"/>
</references> </references>
</references> </references>
<?line 123?> <?line 162?>
<section anchor="change-log"> <section numbered="false" anchor="acknowledgments">
<name>Change Log</name>
<section anchor="since-draft-ietf-core-coap-dtls-alpn-04">
<name>Since <eref target="https://datatracker.ietf.org/doc/draft-ietf-co
re-coap-dtls-alpn/04/">draft-ietf-core-coap-dtls-alpn-04</eref></name>
<ul spacing="normal">
<li>
<t>Address Deb Cooley's IESG ballot COMMENT</t>
</li>
</ul>
</section>
<section anchor="since-draft-ietf-core-coap-dtls-alpn-03">
<name>Since <eref target="https://datatracker.ietf.org/doc/draft-ietf-co
re-coap-dtls-alpn/03/">draft-ietf-core-coap-dtls-alpn-03</eref></name>
<ul spacing="normal">
<li>
<t>Make DTLS references normative</t>
</li>
</ul>
</section>
<section anchor="since-draft-ietf-core-coap-dtls-alpn-02">
<name>Since <eref target="https://datatracker.ietf.org/doc/draft-ietf-co
re-coap-dtls-alpn/02/">draft-ietf-core-coap-dtls-alpn-02</eref></name>
<ul spacing="normal">
<li>
<t>Address shepherd review</t>
</li>
</ul>
</section>
<section anchor="since-draft-ietf-core-coap-dtls-alpn-01">
<name>Since <eref target="https://datatracker.ietf.org/doc/draft-ietf-co
re-coap-dtls-alpn/01/">draft-ietf-core-coap-dtls-alpn-01</eref></name>
<ul spacing="normal">
<li>
<t>Address review by Esko Dijk</t>
</li>
<li>
<t>Address review by Marco Tiloca</t>
</li>
</ul>
</section>
<section anchor="since-draft-ietf-core-coap-dtls-alpn-00">
<name>Since <eref target="https://datatracker.ietf.org/doc/draft-ietf-co
re-coap-dtls-alpn/00/">draft-ietf-core-coap-dtls-alpn-00</eref></name>
<ul spacing="normal">
<li>
<t>Fix ALPN ID for CoAP over TLS</t>
</li>
<li>
<t>Change intended status to Informational</t>
</li>
</ul>
</section>
</section>
<section numbered="false" anchor="acknowledgments">
<name>Acknowledgments</name> <name>Acknowledgments</name>
<t>We like to thank Rich Salz for the expert review on the "co" ALPN ID al <t>We would like to thank <contact fullname="Rich Salz"/> for the expert r
location. eview on the "co" ALPN ID allocation.
We also like to thank Mohamed Boucadair and Ben Schwartz for their early review We would also like to thank <contact fullname="Mohamed Boucadair"/> and <contact
before WG adoption fullname="Ben Schwartz"/> for their early reviews before WG adoption
of this draft and Esko Dijk, Thomas Fossati, and Marco Tiloca for their feedback of this specification and <contact fullname="Esko Dijk"/>, <contact fullname="Th
and comments.</t> omas Fossati"/>, and <contact fullname="Marco Tiloca"/> for their feedback and c
omments.</t>
<t>This work was supported in parts by the German Federal Ministry of Rese
arch, Technology, and Space (BMFTR) under the grant numbers 16KIS1386K (TU Dresd
en) and 16KIS1387 (HAW Hamburg) within the research project PIVOT and under the
grant numbers 16KIS1694K (TU Dresden) and 16KIS1695 (HAW Hamburg) within the res
earch project C-ray4edge.</t>
</section> </section>
</back> </back>
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