Cursor-based Pagination of SCIM Resources
draft-ietf-scim-cursor-pagination-11

SCIM                                                    M. Peterson, Ed.
Internet-Draft                                                   Entrust
Updates: 7643, 7644 (if approved)                             D. Zollner
Intended status: Standards Track                             Independent
Expires: 16 January 2026                                       A. Sehgal
                                                     Amazon Web Services
                                                            15 July 2025

               Cursor-based Pagination of SCIM Resources
                  draft-ietf-scim-cursor-pagination-11

Abstract

   This document updates RFC7643 and RFC7644 by defining additional SCIM
   (System for Cross-Domain Identity Management) query parameters and
   result attributes to allow use of cursor-based pagination in SCIM
   service providers that are implemented with existing code bases,
   databases, or APIs where cursor-based pagination is already well
   established.

Discussion Venues

   This note is to be removed before publishing as an RFC.

   Discussion of this document takes place on the System for Cross-
   domain Identity Management Working Group mailing list
   (scim@ietf.org), which is archived at
   https://mailarchive.ietf.org/arch/browse/scim/.

   Source for this draft and an issue tracker can be found at
   https://github.com/ietf-scim-wg/draft-ietf-scim-cursor-pagination.

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/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

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   This Internet-Draft will expire on 16 January 2026.

Copyright Notice

   Copyright (c) 2025 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
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   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   3
     1.2.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Query Parameters and Response Attributes  . . . . . . . . . .   4
     2.1.  Pagination errors . . . . . . . . . . . . . . . . . . . .   7
     2.2.  Sorting . . . . . . . . . . . . . . . . . . . . . . . . .   7
     2.3.  Implementing Cursors as the Only Pagination Method  . . .   7
     2.4.  Implementing Both Cursors and Index Pagination  . . . . .   8
   3.  Querying Resources using HTTP POST  . . . . . . . . . . . . .   8
   4.  Service Provider Configuration  . . . . . . . . . . . . . . .   9
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
     5.1.  Threat Model and Security Environment . . . . . . . . . .  11
     5.2.  Confidentiality . . . . . . . . . . . . . . . . . . . . .  12
     5.3.  Availability  . . . . . . . . . . . . . . . . . . . . . .  13
     5.4.  Other Security References . . . . . . . . . . . . . . . .  13
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   7.  Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .  14
   8.  Acknowledgments and Contributions . . . . . . . . . . . . . .  15
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

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1.  Introduction

   The two common patterns for result pagination are index-based
   pagination and cursor-based pagination.  Rather than attempt to
   compare and contrast the advantages and disadvantages of competing
   pagination patterns, this document simply recognizes that SCIM
   (System for Cross-Domain Identity Management) service providers are
   commonly implemented as an interoperability layer on top of already
   existing application codebases, databases, and/or APIs that already
   have a well established pagination pattern.

   Translating from an underlying cursor-based pagination pattern to the
   index-based pagination defined in Section 3.4.2.4 of [RFC7644]
   ultimately requires the SCIM service provider to fully iterate the
   underlying cursor, store the results, and then serve indexed pages
   from the stored results.  This task of "pagination translation"
   increases complexity and memory requirements for implementing a SCIM
   service provider, and may be an impediment to SCIM adoption for some
   applications and identity systems.

   This document defines a simple addition to the SCIM protocol that
   allows SCIM service providers to reuse underlying cursors without
   expensive translation.  Support for cursor-based pagination in SCIM
   encourages broader cross-application identity management
   interoperability by encouraging SCIM service provider implementations
   for applications and identity systems where cursor-based pagination
   is already well-established.

   This document updates RFCs 7643 and 7644 because it adds attributes
   to existing structures from those documents, as described in this
   memo in Section 2.  These changes are invoked when using the "cursor"
   parameter when making SCIM search requests using GET or POST methods.

1.1.  Notational Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

1.2.  Definitions

   This document uses the terms defined in section 1.2 of [RFC7643]

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2.  Query Parameters and Response Attributes

   The following table describes the URL pagination query parameters for
   requesting cursor-based pagination:

    +===========+=====================================================+
    | Parameter | Description                                         |
    +===========+=====================================================+
    | cursor    | The string value of the nextCursor attribute from a |
    |           | previous result page.  The cursor value MUST be     |
    |           | empty or omitted for the first request of a cursor- |
    |           | paginated query.  This value may only contain       |
    |           | characters from the unreserved characters set       |
    |           | defined in section 2.3 of [RFC3986].                |
    +-----------+-----------------------------------------------------+
    | count     | Specifies the desired maximum number of query       |
    |           | results per page, e.g., 10.  A negative value SHALL |
    |           | be interpreted as "0".  A value of "0" indicates    |
    |           | that no resource results are to be returned except  |
    |           | for "totalResults".  When specified, the service    |
    |           | provider MUST NOT return more although it MAY       |
    |           | return fewer results.  If unspecified, the maximum  |
    |           | number of returned is set by the service provider.  |
    +-----------+-----------------------------------------------------+

                         Table 1: Query Parameters

   The following table describes cursor-based pagination attributes
   returned in a paged query response:

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    +================+================================================+
    | Element        | Description                                    |
    +================+================================================+
    | nextCursor     | A cursor value string that MAY be used in a    |
    |                | subsequent request to obtain the next page of  |
    |                | results.  Service providers supporting cursor- |
    |                | based pagination MUST include nextCursor in    |
    |                | all paged query responses except when          |
    |                | returning the last page. nextCursor MUST be    |
    |                | omitted from a response only to indicate that  |
    |                | there are no more result pages.                |
    +----------------+------------------------------------------------+
    | previousCursor | A cursor value string that MAY be used in a    |
    |                | subsequent request to obtain the previous page |
    |                | of results.  Returning previousCursor is       |
    |                | OPTIONAL.  previousCursor MUST NOT be returned |
    |                | with the first page.                           |
    +----------------+------------------------------------------------+

                        Table 2: Response Attributes

   Cursor values are URL-safe strings that are opaque to the client.  To
   retrieve another result page for a query, the client MUST query the
   same service provider endpoint with all query parameters and values
   being identical to the initial query with the exception of the cursor
   value which SHOULD be set to a nextCursor (or previousCursor) value
   that was returned by the service provider in a previous response.

   For example, to retrieve the first 10 Users with userName starting
   with J, use an empty cursor and set the count to 10:

   GET /Users?filter=userName%20sw%20J&cursor&count=10
   Host: example.com
   Accept: application/scim+json
   Authorization: Bearer U8YJcYYRMjbGeepD

   The SCIM service provider in response to the query above returns
   metadata regarding pagination similar to the following example
   (actual resources removed for brevity):

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   HTTP/1.1 200 OK
   Content-Type: application/scim+json

   {
      "totalResults":100,
      "itemsPerPage":10,
      "nextCursor":"VZUTiyhEQJ94IR",
      "schemas":["urn:ietf:params:scim:api:messages:2.0:ListResponse"],
      "Resources":[{
         ...
      }]
   }

   Given the example above, to request the next page or results, use the
   same query parameters and values except set the cursor to the value
   of nextCursor (VZUTiyhEQJ94IR):

   GET /Users?filter=username%20sw%20J&cursor=VZUTiyhEQJ94IR&count=10
   Host: example.com
   Accept: application/scim+json
   Authorization: Bearer U8YJcYYRMjbGeepD

   The service provider responds with:

   HTTP/1.1 200 OK
   Content-Type: application/scim+json

   {
      "totalResults": 100,
      "itemsPerPage": 10,
      "previousCursor: "ze7L30kMiiLX6x",
      "nextCursor": "YkU3OF86Pz0rGv",
      "schemas": ["urn:ietf:params:scim:api:messages:2.0:ListResponse"],
      "Resources":[{
         ...
      }]
   }

   In the example above, the response includes the optional
   previousCursor indicating that the service provider supports forward
   and reverse traversal of result pages.

   As described in Section 3.4.1 of [RFC7644] service providers should
   return an accurate value for totalResults which is the total number
   of resources for all pages.  Service providers implementing cursor
   pagination that are unable to estimate totalResults MAY choose to
   omit the totalResults attribute.

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2.1.  Pagination errors

   If a service provider encounters invalid pagination query parameters
   (invalid cursor value, count value, etc), or other error conditions,
   the service provider SHOULD return the appropriate HTTP response
   status code and detailed JSON error response as defined in
   Section 3.12 of [RFC7644].

   For HTTP status code 400 (Bad Request) responses, the following
   detail error types are defined.  These error types extend the list of
   error types defined in section 3.12 of [RFC7644], Table 9: SCIM
   Detail Error Keyword Values.

   +===============+==================================+===============+
   | scimType      | Description                      | Applicability |
   +===============+==================================+===============+
   | invalidCursor | Cursor value is invalid.  Cursor | GET (Section  |
   |               | value SHOULD be empty to request | 3.4.2 of      |
   |               | the first page and set to the    | [RFC7644])    |
   |               | nextCursor or previousCursor     |               |
   |               | value for subsequent queries.    |               |
   +---------------+----------------------------------+---------------+
   | expiredCursor | Cursor has expired.  Do not wait | GET (Section  |
   |               | longer than service provider's   | 3.4.2 of      |
   |               | cursorTimeout to request         | [RFC7644])    |
   |               | additional pages.                |               |
   +---------------+----------------------------------+---------------+
   | invalidCount  | Count value is invalid.  Count   | GET (Section  |
   |               | value must be between 0 and      | 3.4.2 of      |
   |               | service provider's maxPageSize   | [RFC7644])    |
   |               | and must value identical count   |               |
   |               | of the initial query.            |               |
   +---------------+----------------------------------+---------------+

                        Table 3: Pagination Errors

2.2.  Sorting

   If sorting is implemented as described Section 3.4.2.3 of [RFC7644],
   then cursor-paged results should be sorted.

2.3.  Implementing Cursors as the Only Pagination Method

   A service provider MAY require cursor-based pagination to retrieve
   all results for a query by including a nextCursor value in the
   response even when the query does not include the cursor parameter.

   For example:

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   GET /Users
   Host: example.com
   Accept: application/scim+json

   The service provider may respond to the above query with a page
   containing defaultPageSize results and a nextCursor value as shown in
   the below example (Resources omitted for brevity):

   HTTP/1.1 200 OK
   Content-Type: application/scim+json

   {
      "totalResults": 5000,
      "itemsPerPage": 100,
      "nextCursor": "HPq72Pax3JUaNa",
      "schemas": ["urn:ietf:params:scim:api:messages:2.0:ListResponse"],
      "Resources": [{
         ...
      }]
   }

2.4.  Implementing Both Cursors and Index Pagination

   When a service provider supports both index-based and cursor-based
   pagination, clients can use the 'startIndex' or 'cursor' query
   parameters to request a specific method.  Additionally, service
   providers supporting both pagination methods MUST choose a default
   pagination method to use when responding to requests that have not
   specified a pagination query parameter.

   Implementers of SCIM service providers that previously supported only
   index-based pagination and are adding support for cursor-based
   pagination should use index as the default pagination method to avoid
   incompatibility with clients that expect index-based pagination
   behaviors when no pagination query parameters are specified.

   SCIM clients can query the service provider configuration (Section 4)
   endpoint to determine if index-based, cursor-based or both types of
   pagination are supported and which of these is the default.

3.  Querying Resources using HTTP POST

   Section 3.4.3 of [RFC7644] defines how clients may execute queries
   without passing parameters on the URL by using the POST verb combined
   with the /.search path extension execute.  When posting to /.search,
   the client would pass the parameters defined in Section 2 in the body
   of the POST request.  For example:

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  POST /User/.search
  Host: example.com
  Accept: application/scim+json
  Authorization: Bearer U8YJcYYRMjbGeepD

  {
     "schemas": ["urn:ietf:params:scim:api:messages:2.0:SearchRequest"],
     "attributes": ["displayName", "userName"],
     "filter": "displayName sw \"smith\"",
     "cursor": "",
     "count": 10
  }

   Which would return a result containing a nextCursor value which may
   be used by the client in a subsequent call to return the next page of
   resources:

   HTTP/1.1 200 OK
   Content-Type: application/scim+json

   {
      "totalResults": 100,
      "itemsPerPage": 10,
      "nextCursor": "VZUTiyhEQJ94IR",
      "schemas": ["urn:ietf:params:scim:api:messages:2.0:ListResponse"],
      "Resources": [{
         ...
      }]
   }

4.  Service Provider Configuration

   The /ServiceProviderConfig resource defined in Section 4 of [RFC7644]
   facilitates discovery of SCIM service provider features.  A SCIM
   service provider implementing cursor-based pagination SHOULD include
   the following additional attribute in JSON document returned by the
   /ServiceProviderConfig endpoint:

   pagination  A complex type that indicates pagination configuration
      options.  OPTIONAL.  The following sub-attributes are defined:

      cursor  A Boolean value specifying support of cursor-based
         pagination.  REQUIRED.

      index  A Boolean value specifying support of index-based
         pagination.  REQUIRED.

      defaultPaginationMethod  A string value specifying the type of

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         pagination that the service provider defaults to when the
         client has not specified which method it wishes to use.
         Possible values are "cursor" and "index".  OPTIONAL.

      defaultPageSize  Positive integer value specifying the default
         number of results returned in a page when a count is not
         specified in the query.  OPTIONAL.

      maxPageSize  Positive integer specifying the maximum number of
         results returned in a page regardless of what is specified for
         the count in a query.  The maximum number of results returned
         may be further restricted by other criteria.  OPTIONAL.

      cursorTimeout  Positive integer specifying the minimum number of
         seconds that a cursor is valid between page requests.  Clients
         waiting too long between cursor pagination requests may receive
         an invalid cursor error response.  No value being specified may
         mean that there is no cursor timeout or that the cursor timeout
         is not a static duration.  OPTIONAL.

   Service providers may choose not to advertise Service Provider
   Configuration information regarding default pagination method, page
   size or cursor validity.  Clients MUST NOT interpret the lack of
   published Service Provider Configuration values to mean that no
   defaults or limits on page sizes or cursor lifetimes exist, or that
   there is no default pagination method.  Service providers may choose
   not to publish values for the pagination sub-attributes for many
   reasons.  Examples include:

   *  Service providers containing multiple resource types may have
      different values set for each resource type.

   *  Default and maximum page size may be determined by factors besides
      or in addition to the number of resources returned, such as the
      size of each resource on the page.

   Before using cursor-based pagination, a SCIM client MAY fetch the
   Service Provider Configuration document from the SCIM service
   provider and verify that cursor-based pagination is supported.

   For example:

   GET /ServiceProviderConfig
   Host: example.com
   Accept: application/scim+json

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   A service provider supporting both cursor-based pagination and index-
   based pagination would return a document similar to the following
   (full ServiceProviderConfig schema defined in Section 5 of [RFC7643]
   has been omitted for brevity):

   HTTP/1.1 200 OK
   Content-Type: application/scim+json

   {
      "schemas": [
         "urn:ietf:params:scim:schemas:core:2.0:ServiceProviderConfig"],
         ...

      "pagination": {
         "cursor": true,
         "index": true,
         "defaultPaginationMethod": "cursor",
         "defaultPageSize": 100,
         "maxPageSize": 250,
         "cursorTimeout": 3600
      },

      ...
   }

5.  Security Considerations

   This section elaborates on the security considerations associated
   with the implementation of cursor pagination in SCIM.  This document
   is under the same security and privacy considerations of those
   described in [RFC7644].  It is imperative that implementers
   additionally consider the following security aspects to safeguard
   against both deliberate attacks and inadvertent misuse that may
   compromise the system's security posture.

5.1.  Threat Model and Security Environment

   The threat landscape is characterized by two primary types of actors:

   1.  Unauthenticated and Authenticated Malicious Actors: These
       individuals or entities represent a malevolent threat.  Their
       objectives include unauthorized access to data, alteration, or
       deletion through cursor-enabled queries.  They may also seek to
       deplete service provider resources deliberately, aiming to cause
       a denial-of-service state, thereby reducing service availability.

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   2.  Authenticated Benign Users: This category includes legitimate
       users who, due to confusion or a lack of understanding,
       inadvertently engage in actions that consume service provider
       resources excessively.  Such actions, while not ill-intended, can
       lead to unintended denial of service by overwhelming the service
       provider's capacity.

5.2.  Confidentiality

   To ensure that confidential data remains appropriately secured:

   *  Implementers MUST ensure that pagination through results sets is
      strictly confined to the data that the actor's current identity
      has been authorized to access.  This holds true even in cases
      where the actor has obtained a cursor pertaining to a result set
      that was generated by a different actor.

   *  Authorization checks MUST be continuously applied as an actor
      navigates through the result set associated with a cursor.  Under
      no circumstances should possession of a cursor be interpreted as
      granting any supplementary access privileges to the actor.

   *  When possible, service providers SHOULD invalidate all cursors
      corresponding to an actor immediately following a change in
      permissions.  This ensures that any queries executed post-
      permission change, utilizing old cursors, will be denied.  As an
      alternative approach, service provider may opt to retain the
      existing cursors but must ensure that any metadata tied to the
      result set, such as record counts, is updated to reflect the new
      permissions accurately.

   *  In alignment with Section 2, cursor values are URL-Safe strings
      that are opaque to clients.  Server providers should obfuscate
      cursors values to prevent clients from interpreting cursors or
      forging new cursors.  Service providers should be able to easily
      detect forged cursor values and immediately return an
      invalidCursor as described in Section 2.1

   *  The service provider MUST handle error scenarios without exposing
      sensitive data.  For instance, if an actor attempts to access a
      page of results outside their authorized scope, or if a request is
      made for a non-existent page, the service provider should respond
      with identical error messages, so as not to disclose any details
      of the underlying data or the nature of the authorization failure.
      It is acceptable, however, for the service provider to log
      different messages to a log accessible by administrators or other
      authorized personnel.

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5.3.  Availability

   The concern for availability primarily stems from the potential for
   Denial of Service (DoS) attacks.  If the service provider elects to
   retain substantial data or metadata for each cursor, numerous initial
   queries that allocate cursors could strain and eventually exhaust
   service provider resources.  Such an attack could be orchestrated by
   an attacker with malicious intent or could occur unintentionally as a
   result of client testing or bugs.

   To mitigate risks, the following strategies are recommended for
   service providers:

   *  Clients should authenticate to retrieve large result sets.
      Anonymous queries yielding numerous results, may return an HTTP
      status code 400 (Bad Request) with the error type "tooMany," as
      outlined in [RFC7644] section 3.12.

   *  Implement rate limiting to control the volume and cadence of
      cursor requests.  This approach should adhere to established
      standards for rate limiting, details of which can be found in
      [RFC6585].

   *  Allow administrator of the service provider to set a ceiling on
      the number of cursors permissible at any given time or to specify
      a maxPageSize value.  Guidance on configuring such values should
      be documented in the implementation administrator/installation
      guide.

   *  Cursor invalidation mechanisms (including mechanisms triggered by
      permissions changes) must be designed to be resource-efficient to
      prevent them from being exploited for DoS attacks.

5.4.  Other Security References

   Using URIs to describe and locate resources has its own set of
   security considerations discussed in Section 7 of [RFC3986].
   Implementations should also refer to [BCP195] and [RFC9110] for
   additional security considerations that are relevant for underlying
   TLS and HTTP protocols.

6.  IANA Considerations

   This specification requests IANA to amends the SCIM Server-Related
   Schema URIs registry established by [RFC7643].

   For the urn:ietf:params:scim:api:messages:2.0:ListResponse, add
   Section 2 of this document to the References column.

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   For the urn:ietf:params:scim:api:messages:2.0:SearchRequest, add
   Section 2 of this document to the References column.

   For the urn:ietf:params:scim:schemas:core:2.0:ServiceProviderConfig,
   add Section 4 of this document to the References column.

7.  Change Log

   RFC Editor: Please remove this section in the release version of the
   document.

   -08

   *  Fix several typos and wording consistencies

   *  Add reference to RFC7644 in Security Considerations

   *  Adjust indenting and wording to clarify the definition of the
      pagination attribute in serviceProviderConfig

   *  Reference RFC section 2.3 (not section 2.2) for unreserved
      characters

   *  Reference section RFC 7644 3.4.3 (not section 3.4.2.4 ) for POST
      query

   *  Added updates 7644, 7643

   *  Changed IANA considerations to add sections of this document to
      References column of SCIM Schema URIs for Data Resources impacted
      by this document

   -07

   *  Minor grammar change

   *  Add informative reference to BCP195 and RFC9110

   -05

   *  Various updates in response to WG/IETF Last Call feedback

   -04

   *  Added IANA Considerations section

   *  Added Security Considerations section

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   *  Added Backwards Compatibility Considerations section

   -03

   *  Minor grammatical/typo fixes, rename + changes to maxPageSize SCP
      definition

   -02

   *  Typos/semantics, acknowledgements, expansion of cursorTimeout SCP
      definition

   -01

   *  Updated after Httpdir review.

   -00

   *  Adopted by SCIM WG.

8.  Acknowledgments and Contributions

   The authors would like to acknowledge the contribution of Paul Lanzi
   (IDenovate) in leading the writing of security considerations
   section.

   The authors would also like to acknowledge the following individuals
   who provided valuable feedback while reviewing the document:

   *  Aaron Parecki - Okta

   *  David Brossard - Axiomatics

   *  Dean H.  Saxe - Independent

   *  Pamela Dingle - Microsoft

9.  References

9.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/rfc/rfc2119>.

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   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifier (URI): Generic Syntax", STD 66,
              RFC 3986, DOI 10.17487/RFC3986, January 2005,
              <https://www.rfc-editor.org/rfc/rfc3986>.

   [RFC6585]  Nottingham, M. and R. Fielding, "Additional HTTP Status
              Codes", RFC 6585, DOI 10.17487/RFC6585, April 2012,
              <https://www.rfc-editor.org/rfc/rfc6585>.

   [RFC7643]  Hunt, P., Ed., Grizzle, K., Wahlstroem, E., and C.
              Mortimore, "System for Cross-domain Identity Management:
              Core Schema", RFC 7643, DOI 10.17487/RFC7643, September
              2015, <https://www.rfc-editor.org/rfc/rfc7643>.

   [RFC7644]  Hunt, P., Ed., Grizzle, K., Ansari, M., Wahlstroem, E.,
              and C. Mortimore, "System for Cross-domain Identity
              Management: Protocol", RFC 7644, DOI 10.17487/RFC7644,
              September 2015, <https://www.rfc-editor.org/rfc/rfc7644>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.

9.2.  Informative References

   [BCP195]   Best Current Practice 195,
              <https://www.rfc-editor.org/info/bcp195>.
              At the time of writing, this BCP comprises the following:

              Moriarty, K. and S. Farrell, "Deprecating TLS 1.0 and TLS
              1.1", BCP 195, RFC 8996, DOI 10.17487/RFC8996, March 2021,
              <https://www.rfc-editor.org/info/rfc8996>.

              Sheffer, Y., Saint-Andre, P., and T. Fossati,
              "Recommendations for Secure Use of Transport Layer
              Security (TLS) and Datagram Transport Layer Security
              (DTLS)", BCP 195, RFC 9325, DOI 10.17487/RFC9325, November
              2022, <https://www.rfc-editor.org/info/rfc9325>.

   [RFC9110]  Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,
              Ed., "HTTP Semantics", STD 97, RFC 9110,
              DOI 10.17487/RFC9110, June 2022,
              <https://www.rfc-editor.org/rfc/rfc9110>.

Authors' Addresses

   Matt Peterson (editor)
   Entrust

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   Email: matt.peterson@entrust.com

   Danny Zollner
   Independent
   Email: danny@zollnerd.com

   Anjali Sehgal
   Amazon Web Services
   Email: anjalisg@amazon.com

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